subject:(Carbon Fiber Reinforced Polymer)

Kansas State University

1. Curnutt, Austin. Research on the mechanics of CFRP composite lap joints.

Degree: MS, Department of Architectural Engineering, 2017, Kansas State University

URL: http://hdl.handle.net/2097/38191

► For this thesis, research was performed on CFRP bonded composite lap-joints with one and two continuous laminas through the lap. Composite wraps used to retrofit… (more)

Subjects/Keywords: CFRP; Lap-joint; Carbon fiber reinforced polymer

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APA (6^th Edition):

Curnutt, A. (2017). Research on the mechanics of CFRP composite lap joints. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/38191

Chicago Manual of Style (16^th Edition):

Curnutt, Austin. “Research on the mechanics of CFRP composite lap joints.” 2017. Masters Thesis, Kansas State University. Accessed March 07, 2021. http://hdl.handle.net/2097/38191.

MLA Handbook (7^th Edition):

Curnutt, Austin. “Research on the mechanics of CFRP composite lap joints.” 2017. Web. 07 Mar 2021.

Vancouver:

Curnutt A. Research on the mechanics of CFRP composite lap joints. [Internet] [Masters thesis]. Kansas State University; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2097/38191.

Council of Science Editors:

Curnutt A. Research on the mechanics of CFRP composite lap joints. [Masters Thesis]. Kansas State University; 2017. Available from: http://hdl.handle.net/2097/38191

Anna University

2. Mathai, Jessy. Performance of retrofitted reinforced concrete columns subjected to cyclic loading.

Degree: Civil Engineering, 2013, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/10090

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Most of the Indian buildings are vulnerable to seismic action due to improper reinforcement detailing within the beam-column joints. The reinforced concrete frames without seismic… (more)

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Most of the Indian buildings are vulnerable to seismic action due to improper reinforcement detailing within the beam-column joints. The reinforced concrete frames without seismic provision are often characterized by an unsatisfactory structural behaviour due to low available ductility and lack of strength which in turn induces global failure mechanism. Hence it is very much essential to retrofit the vulnerable building to cope up for the next damaging earthquake. In the present work, experimental and analytical investigations have been carried out to study the structural behaviour of columns strengthened by Glass Fiber Reinforced Polymer (GFRP), Carbon Fibre Reinforced Polymer (CFRP), Reinforced Concrete jacketing (RC), Steel plate, Steel strip, Corrugated steel jacketing and Ferro cement jacketing of beam -column joint. The entire study was divided into 5 distinct phases. In the first phase, the performance of Reinforced Concrete columns subjected to cyclic loading is studied to determine the desirable percentage of longitudinal reinforcement. In the second phase, six experiments were conducted to find out the effectiveness of using Fibre reinforced polymer jackets for enhancing the seismic shear strength and ductility of column. In the third phase, nine experiments were conducted to find out the effectiveness of using Reinforced concrete jacketing. In the fourth phase, seven experiments were conducted to find out the effectiveness of using steel plate, steel strip and corrugated steel jacketing of column for enhancing the seismic shear strength and ductility. In the fifth phase, four experiments were conducted to find out the effectiveness of Ferro cement jacketing of column for enhancing the seismic shear strength and ductility. Comparison of load carrying capacity, energy dissipation capacity and ductility of the specimens retrofitted with CFRP, GFRP, RC, Steel and Ferro cement jacketing were made.

Appendices p. 126-137, References p. 138-144, List of publications p. 145-146

Advisors/Committee Members: Jaya K P.

Subjects/Keywords: Indian buildings; Glass Fiber Reinforced Polymer; Carbon Fibre Reinforced Polymer; Reinforced Concrete

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APA (6^th Edition):

Mathai, J. (2013). Performance of retrofitted reinforced concrete columns subjected to cyclic loading. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/10090

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mathai, Jessy. “Performance of retrofitted reinforced concrete columns subjected to cyclic loading.” 2013. Thesis, Anna University. Accessed March 07, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/10090.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mathai, Jessy. “Performance of retrofitted reinforced concrete columns subjected to cyclic loading.” 2013. Web. 07 Mar 2021.

Vancouver:

Mathai J. Performance of retrofitted reinforced concrete columns subjected to cyclic loading. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Mar 07]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/10090.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mathai J. Performance of retrofitted reinforced concrete columns subjected to cyclic loading. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/10090

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

3. Paul theophilus rajakumar I. Online monitoring of drilling carbon fiber reinforced polymeric nanocomposite laminates using acoustic emission technique;.

Degree: Carbon fiber reinforced polymeric nanocomposite laminates using acoustic emission technique, 2014, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/17559

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The broad area of this research is machining of Polymer Matrix newlineComposite (PMC). Composite materials can be defined as materials newlineconsisting of two or more… (more)

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The broad area of this research is machining of Polymer Matrix newlineComposite (PMC). Composite materials can be defined as materials newlineconsisting of two or more constituents that are combined at the macroscopic newlinelevel and are not soluble in each other. Composites are composed of two newlinephases, namely matrix and reinforcement. PMCs have a matrix which is made newlineof a thermoset or a thermoplastic polymeric resin. The most common types of newlinereinforcement used for PMC are strong and brittle fibers incorporated into a newlinesoft and ductile polymeric matrix. Hence PMCs are generally referred to as newlineFiber Reinforced Plastics (FRP). FRP composites have been steadily replacing metals as choice newlineengineering materials for various applications because of their very high newlinespecific strength and stiffness. Among all the FRPs, Carbon Fiber Reinforced newlinePlastic (CFRP) is much sought after material because of its light weight, very newlinehigh strength and high stiffness. Recently, polymeric nanocomposites have newlinefound greater application in the area of aerospace and defence sectors. In FRP composite laminates, when nano particles are dispersed in newlinethe polymer matrix, the composite may be referred to as nanocomposite or newlinehybrid composite. CFRP nanocomposites are the hybrid of CFRP composites newlinein which the reinforcement has at least one of its dimensions in the nanometer newlinerange. These nanocomposites show great promise not only in terms of superior mechanical properties, but also in terms of superior thermal, newlineelectrical, optical, and other properties. In general, there are two types of nano newlinereinforcements, namely Carbon Nano Fibers (CNF) and Carbon Nano Tubes newline(CNT) which are used in the matrix of the CFRP nanocomposites. Even newlinethough the FRP components are mostly produced near net shape, machining is newlinefrequently required in order to bring the component into dimensional newlinerequirements and prepare it for assembly. Out of all the machining operations, drilling is the most frequently newlineemployed operation for FRP composite laminates owing to the need for newlinejoining structures.

References p.160-170

Advisors/Committee Members: Hariharan P.

Subjects/Keywords: Carbon Fiber Reinforced Plastic; Carbon Nano Fibers; Carbon Nano Tubes; Fiber Reinforced Plastics; Mechanical Engineering; Polymer Matrix Composite

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APA (6^th Edition):

I, P. t. r. (2014). Online monitoring of drilling carbon fiber reinforced polymeric nanocomposite laminates using acoustic emission technique;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17559

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

I, Paul theophilus rajakumar. “Online monitoring of drilling carbon fiber reinforced polymeric nanocomposite laminates using acoustic emission technique;.” 2014. Thesis, Anna University. Accessed March 07, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/17559.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

I, Paul theophilus rajakumar. “Online monitoring of drilling carbon fiber reinforced polymeric nanocomposite laminates using acoustic emission technique;.” 2014. Web. 07 Mar 2021.

Vancouver:

I Ptr. Online monitoring of drilling carbon fiber reinforced polymeric nanocomposite laminates using acoustic emission technique;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Mar 07]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17559.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

I Ptr. Online monitoring of drilling carbon fiber reinforced polymeric nanocomposite laminates using acoustic emission technique;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17559

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Stony Brook University

4. Huang, Chong. Surface Damage Detection of CFRP Laminates Using Inverse Analysis .

Degree: 2009, Stony Brook University

URL: http://hdl.handle.net/1951/52232

Subjects/Keywords: Carbon fiber reinforced polymer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Huang, C. (2009). Surface Damage Detection of CFRP Laminates Using Inverse Analysis . (Thesis). Stony Brook University. Retrieved from http://hdl.handle.net/1951/52232

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Huang, Chong. “Surface Damage Detection of CFRP Laminates Using Inverse Analysis .” 2009. Thesis, Stony Brook University. Accessed March 07, 2021. http://hdl.handle.net/1951/52232.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Huang, Chong. “Surface Damage Detection of CFRP Laminates Using Inverse Analysis .” 2009. Web. 07 Mar 2021.

Vancouver:

Huang C. Surface Damage Detection of CFRP Laminates Using Inverse Analysis . [Internet] [Thesis]. Stony Brook University; 2009. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1951/52232.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Huang C. Surface Damage Detection of CFRP Laminates Using Inverse Analysis . [Thesis]. Stony Brook University; 2009. Available from: http://hdl.handle.net/1951/52232

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

5. Ren, Baiyang. ADHESIVE BOND INSPECTION FOR COMPOSITES WITH ULTRASONIC GUIDED WAVES .

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/12592

► Composite materials are increasingly used in aerospace industries as primary structure because of their low weight, high strength and stiffness, as well as resistance to… (more)

▼ Composite materials are increasingly used in aerospace industries as primary structure because of their low weight, high strength and stiffness, as well as resistance to corrosion. Adhesively bonded joints are one of the best options for joining composite materials. However, adhesive bonds are subject to damage such as adhesive defects, e.g. disbonds, and cohesive defects, e.g. porosity. Ultrasonic guided wave techniques are regarded as promising methods for bond condition inspection. Ultrasonic guided waves can travel long distances without too much attenuation. The large number of propagating modes that correspond to different displacement distributions provides the possibility to characterize different types of defects. Adhesive defects are the focus of this thesis. The objective of this thesis is to extend recent research on inspection of isotropic adhesive bonds to composite adhesive bonds. The mode conversion that occurs at waveguide transitions will be studied. Analysis methods that are similar to those used with isotropic materials are employed and their performance will be evaluated. The similarities and differences when selecting effective modes for inspection of isotropic and anisotropic materials will be studied. Challenges associated with inspection of bonded region can be summarized as finding a mode sensitive to adhesive defects and successfully exciting that mode. Mode selection takes both of these aspects into consideration. A simplified skin-stringer system is considered. Both skin and stringer are carbon fiber reinforced polymer with a [0/45/90/-45]S2 stacking sequence. Dispersion analysis is conducted on skin and bonded region waveguides. A wave structure based method gives the candidate modes and frequencies that are sensitive to adhesive defects. Wave structure matching and the normal mode expansion method are utilized to study the mode conversion at waveguide transitions. Mode selection is carried out based on the requirements of sensitivity and excitability. Further optimization is necessary for practical reasons. The attenuation and skewing propagation direction could affect the inspection considerably. The choices for mode selection have been further narrowed down by choosing modes in the low frequency range and having small skew angles. Finite element simulation performed to demonstrate the excitation of an effective mode shows that the resultant displacement field in the bonded region satisfies the requirement of having a large in-plane displacement at the interface. Experiments have been conducted on the adhesively bonded skin-stringer with artificial defects. Defects are simulated by inserting Teflon film between the skin and the adhesive layer. Experimental results show that the effective modes have good sensitivity to the adhesive defects while another mode that is expected to have poor sensitivity to the defect does not show the capability to detect the defects. One optimal mode detected bonds in terms of frequency content. The other optimal mode could distinguish the good bond… Advisors/Committee Members: Clifford Jesse Lissenden Iii, Thesis Advisor/Co-Advisor, Clifford Jesse Lissenden Iii, Thesis Advisor/Co-Advisor.

Subjects/Keywords: ultrasonic guided wave; nondestructive evaluation; adhesive bond; carbon-fiber-reinforced polymer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ren, B. (2011). ADHESIVE BOND INSPECTION FOR COMPOSITES WITH ULTRASONIC GUIDED WAVES . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12592

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ren, Baiyang. “ADHESIVE BOND INSPECTION FOR COMPOSITES WITH ULTRASONIC GUIDED WAVES .” 2011. Thesis, Penn State University. Accessed March 07, 2021. https://submit-etda.libraries.psu.edu/catalog/12592.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ren, Baiyang. “ADHESIVE BOND INSPECTION FOR COMPOSITES WITH ULTRASONIC GUIDED WAVES .” 2011. Web. 07 Mar 2021.

Vancouver:

Ren B. ADHESIVE BOND INSPECTION FOR COMPOSITES WITH ULTRASONIC GUIDED WAVES . [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Mar 07]. Available from: https://submit-etda.libraries.psu.edu/catalog/12592.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ren B. ADHESIVE BOND INSPECTION FOR COMPOSITES WITH ULTRASONIC GUIDED WAVES . [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12592

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Miami

6. Ozcoban, Ezgi. Comparison of Reinforced Concrete Bridge and Fiber Reinforced Polymer Bridge Using Life Cycle Assessment.

Degree: MS, Civil, Architectural and Environmental Engineering (Engineering), 2017, University of Miami

URL: https://scholarlyrepository.miami.edu/oa_theses/674

► Life Cycle Assessment (LCA) is an important tool assessing environmental impacts of the entire life cycle of a product or service. It provides an… (more)

Subjects/Keywords: Life Cycle Assessment; Fiber Reinforced Polymer; Carbon Emission; Embodied Energy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ozcoban, E. (2017). Comparison of Reinforced Concrete Bridge and Fiber Reinforced Polymer Bridge Using Life Cycle Assessment. (Thesis). University of Miami. Retrieved from https://scholarlyrepository.miami.edu/oa_theses/674

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ozcoban, Ezgi. “Comparison of Reinforced Concrete Bridge and Fiber Reinforced Polymer Bridge Using Life Cycle Assessment.” 2017. Thesis, University of Miami. Accessed March 07, 2021. https://scholarlyrepository.miami.edu/oa_theses/674.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ozcoban, Ezgi. “Comparison of Reinforced Concrete Bridge and Fiber Reinforced Polymer Bridge Using Life Cycle Assessment.” 2017. Web. 07 Mar 2021.

Vancouver:

Ozcoban E. Comparison of Reinforced Concrete Bridge and Fiber Reinforced Polymer Bridge Using Life Cycle Assessment. [Internet] [Thesis]. University of Miami; 2017. [cited 2021 Mar 07]. Available from: https://scholarlyrepository.miami.edu/oa_theses/674.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ozcoban E. Comparison of Reinforced Concrete Bridge and Fiber Reinforced Polymer Bridge Using Life Cycle Assessment. [Thesis]. University of Miami; 2017. Available from: https://scholarlyrepository.miami.edu/oa_theses/674

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona

7. Rivers, Roger Troy. Experimental Testing of CFRP Splays Bonded to Uniaxial Fabric .

Degree: 2014, University of Arizona

URL: http://hdl.handle.net/10150/321612

► The use of fiber reinforced polymers (FRP's) for structural repair or retrofit has increased significantly in the last decade, with adoption for civil infrastructure occurring… (more)

Subjects/Keywords: Carbon Fiber Reinforced Polymer; CFRP; Dowel; Splay; Tension; Civil Engineering; Anchor

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rivers, R. T. (2014). Experimental Testing of CFRP Splays Bonded to Uniaxial Fabric . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/321612

Chicago Manual of Style (16^th Edition):

Rivers, Roger Troy. “Experimental Testing of CFRP Splays Bonded to Uniaxial Fabric .” 2014. Masters Thesis, University of Arizona. Accessed March 07, 2021. http://hdl.handle.net/10150/321612.

MLA Handbook (7^th Edition):

Rivers, Roger Troy. “Experimental Testing of CFRP Splays Bonded to Uniaxial Fabric .” 2014. Web. 07 Mar 2021.

Vancouver:

Rivers RT. Experimental Testing of CFRP Splays Bonded to Uniaxial Fabric . [Internet] [Masters thesis]. University of Arizona; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10150/321612.

Council of Science Editors:

Rivers RT. Experimental Testing of CFRP Splays Bonded to Uniaxial Fabric . [Masters Thesis]. University of Arizona; 2014. Available from: http://hdl.handle.net/10150/321612

KTH

8. Yussuf, Yusuf Abdi. FRP:s användning inom brokonstruktioner.

Degree: Building Technology and Design, 2019, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259362

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I dagsläget är de flesta broar i Sverige tillverkade med betong eller stål. Dessa broar är många gånger förknippade med stora kostnader som ofta… (more)

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I dagsläget är de flesta broar i Sverige tillverkade med betong eller stål. Dessa broar är många gånger förknippade med stora kostnader som ofta beror på underhåll och reparation. FRP, som står för Fiber Reinforced Polymer, är ett relativt nytt material i bärande stommar men är ett väl etablerat material i förstärkningssammanhang. I Europa och i synnerhet Nederländerna finns det flertal broar byggda i FRP. Men på grund av brist på normer och regelverk att luta sig emot sker det sällan någon form av brokonstruktion med FRP i Sverige. Detta examensarbete syftar till att undersöka befintliga normer och studera hur materialet FRP används vid förstärkning och konstruktion av broar. Vidare syftar även arbetet till att undersöka egenskaperna hos FRP som byggmaterial och jämföra det med konventionella material som stål och betong. FRP, också benämnd fiberkomposit, är ett kompositmaterial som kan sammanställas på flera olika sätt. Genom olika material som kombineras och olika tillverkningsprocesser som används kan man på så sätt ge individuell utformning till materialet för dess användning. Fördelarna med FRP är många, men i allmänhet har det god styrka, god beständighet samtidigt som det har en låg vikt. Detta resulterar i att inom brokonstruktion så ger det strukturen en minskad egenvikt, vilket i sin tur underlättar en mängd olika saker. Detta arbete visar på att FRP-material har fördelaktiga egenskaper och kan i vissa situationer vara mer gynnsamt att använda än stål eller betong. Dock som tidigare påpekat saknas det specifika Eurokoder för detta material. Däremot är vi säkra på att introduktionen av en ny Eurokod samt med uppmuntran från myndigheter kommer användningen av FRP inom brokonstruktion utan tvekan öka.

At present, most bridges in Sweden are made with concrete or steel. These bridges are often associated with high costs, which often depend on maintenance and repair. FRP, which stands for Fiber Reinforced Polymer, is a relatively new material in load-bearing structures but is a well- established material in the context of reinforcement. In Europe and in particular the Netherlands, there are several bridges built in FRP. But due to a lack of norms and regulations to lean against, there is rarely any kind of FRP bridge construction in Sweden. The aim of this thesis is to examine existing norms and study how the material FRP is used in the reinforcement and construction of bridges. Furthermore, this thesis also aims to investigate the properties of FRP as building material and compare it with conventional materials such as steel and concrete. FRP, also called fiber-composite, is a composite material that can be assembled in several different ways. Through various materials that are combined and different manufacturing processes used, one can thus provide individual designs for the material. The benefits of FRP are many, but generally it has good strength, good durability while having a low weight. This results in that within bridge construction, it gives the structure a reduced self-weight, which in…

Subjects/Keywords: FRP; fiber-reinforced polymer; glass fiber; carbon fiber; aramid fiber; structural fiber composites; composites; CFRP; GFRP; FRP; fiber reinforced polymer; glass fiber; carbon fiber; aramid fiber; structural fiber composites; composites; CFRP; GFRP; Infrastructure Engineering; Infrastrukturteknik

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yussuf, Y. A. (2019). FRP:s användning inom brokonstruktioner. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259362

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yussuf, Yusuf Abdi. “FRP:s användning inom brokonstruktioner.” 2019. Thesis, KTH. Accessed March 07, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259362.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yussuf, Yusuf Abdi. “FRP:s användning inom brokonstruktioner.” 2019. Web. 07 Mar 2021.

Vancouver:

Yussuf YA. FRP:s användning inom brokonstruktioner. [Internet] [Thesis]. KTH; 2019. [cited 2021 Mar 07]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259362.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yussuf YA. FRP:s användning inom brokonstruktioner. [Thesis]. KTH; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259362

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University

9. Sabapathy Y K. Experimental and analytical study on GFRP reinforced concrete deep beams.

Degree: Civil Engineering, 2013, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/10080

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Corrosion of steel in reinforced concrete structures is one of the biggest challenges faced by the civil construction industry today. In reinforced concrete structures, corrosion… (more)

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Corrosion of steel in reinforced concrete structures is one of the biggest challenges faced by the civil construction industry today. In reinforced concrete structures, corrosion of steel reinforcement due to harsh environmental conditions considerably reduces the durability and life span of these structures. To overcome this corrosion problem, many new techniques have been tried and found to be either expensive or ineffective. Fiber Reinforced Polymer (FRP) materials in the form of solid bars has been successfully tried as a substitute for steel reinforcement in concrete structures. Considerable research has been carried out to study the flexural and shear behaviour of FRP reinforced slender concrete beams. However, very little effort has been taken to study the behaviour of Reinforced Concrete (RC) deep beams reinforced with FRP rebars. This work is an attempt to study the shear behaviour of RC deep beams reinforced with Glass Fiber Reinforced Polymer (GFRP) web reinforcement. The thirteen deep beams were cast with and without GFRP web reinforcement and were tested in this work. The testing was done in two stages - in the first stage, i.e. in Series-I, nine deep beams were tested with a shear span to effective depth ratio of 0.72 and the results showed a substantial increase in the ultimate shear load carrying capacity for deep beams reinforced with GFRP web reinforcement when compared to those without web reinforcement. Considering this significant increase, four more deep beams were cast in the second stage i.e. Series-II and were tested with a shear span to effective depth ratio of 1.08. Finally, after analysis of the experimental results, a design equation was formulated to predict the shear carrying capacity of GFRP web reinforced deep beams. The results obtained by using this equation were found to be acceptable and so, this equation may be adopted for predicting the shear load capacity of deep beams reinforced with GFRP web reinforcement and loaded within a small shear span to depth ratio.

Appendices p. 184-198, References p.199-204, List of publications p. 205

Advisors/Committee Members: Nagamani K.

Subjects/Keywords: Reinforced concrete; Glass fiber reinforced polymer; Fiber reinforced polymer; Civil Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

K, S. Y. (2013). Experimental and analytical study on GFRP reinforced concrete deep beams. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/10080

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

K, Sabapathy Y. “Experimental and analytical study on GFRP reinforced concrete deep beams.” 2013. Thesis, Anna University. Accessed March 07, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/10080.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

K, Sabapathy Y. “Experimental and analytical study on GFRP reinforced concrete deep beams.” 2013. Web. 07 Mar 2021.

Vancouver:

K SY. Experimental and analytical study on GFRP reinforced concrete deep beams. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Mar 07]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/10080.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

K SY. Experimental and analytical study on GFRP reinforced concrete deep beams. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/10080

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toledo

10. Paneru, Nav Raj. Carbon Fiber Reinforced Polymer (CFRP) Tendons in Bridges.

Degree: MS, Civil Engineering, 2018, University of Toledo

URL: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544741841522648

► Carbon fiber reinforced polymer (CFRP) reinforcement has been studied as an alternative to steel reinforcement due to steel's high susceptibility to corrosion in bridge girders.… (more)

▼ Carbon fiber reinforced polymer (CFRP) reinforcement has been studied as an alternative to steel reinforcement due to steel's high susceptibility to corrosion in bridge girders. The use of deicing salts on roads during extreme cold is the primary cause of the corrosive environment due to salt percolation through cracks. This research manifests the flexural behavior of carbon fiber polymer reinforced beams in prestressed and non-prestressed conditions as well as the variation of the behavior from conventional steel reinforced beams including the design procedure of a prestressed CFRP box section beam through a case study.Unlike steel, CFRP has different stress versus strain relationship - linear without a definite yield point. A review of literature is done regarding the history, properties, applications, and researches in this field. A comparative study is done between the behavior of CFRP reinforced beams using previously tested rectangular and decked bulb T-beams. The study also focuses on the field of application, guidelines, and provisions in different parts of the world, design procedure, characteristics and weaknesses of the material, handling of CFRP in the field, and its design.The application of CFRP as the main reinforcement is scarce because of its brittleness and limited research. However, the strength and lightness make this material ideal for use in the construction industry. It is important that these beams have adequate ductility to prevent sudden failure. Ductility of similar types of beams with conventional and CFRP materials are studied and compared through deformability index. Several methods of calculating ductility are discussed and an ACI method is selected to find the ductility of each beam and a comparative study is done. The behavior of prestressed CFRP tendon is examined when it is used as an alternative to the conventional steel tendon through a case study relating different provisions of code through the design of a prestressed CFRP box section beam over the Ottawa river. Advisors/Committee Members: Nims, Douglas (Committee Chair).

Subjects/Keywords: Civil Engineering; CFRP; CFCC; Prestressed CFRP; Tendons; Strands; Carbon Fiber Reinforced Polymer; FRP; GFRP; AFRP; Bridge Design; Carbon Fiber Reinforced Polymer Tendons in Bridges

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APA (6^th Edition):

Paneru, N. R. (2018). Carbon Fiber Reinforced Polymer (CFRP) Tendons in Bridges. (Masters Thesis). University of Toledo. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544741841522648

Chicago Manual of Style (16^th Edition):

Paneru, Nav Raj. “Carbon Fiber Reinforced Polymer (CFRP) Tendons in Bridges.” 2018. Masters Thesis, University of Toledo. Accessed March 07, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544741841522648.

MLA Handbook (7^th Edition):

Paneru, Nav Raj. “Carbon Fiber Reinforced Polymer (CFRP) Tendons in Bridges.” 2018. Web. 07 Mar 2021.

Vancouver:

Paneru NR. Carbon Fiber Reinforced Polymer (CFRP) Tendons in Bridges. [Internet] [Masters thesis]. University of Toledo; 2018. [cited 2021 Mar 07]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544741841522648.

Council of Science Editors:

Paneru NR. Carbon Fiber Reinforced Polymer (CFRP) Tendons in Bridges. [Masters Thesis]. University of Toledo; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544741841522648

University of Houston

11. Sahin, Mehmet Ugur. BOND BEHAVIOR BETWEEN STEEL AND HIGH MODULUS CFRP PLATES AT MODERATLEY ELEVATED TEMPERATURES.

Degree: MSin Civil Engineering, Civil Engineering, 2014, University of Houston

URL: http://hdl.handle.net/10657/1647

► This thesis presents the findings of a research study that was conducted to assess the effect of moderately elevated temperatures, up to 50 °C, on… (more)

Subjects/Keywords: High modulus carbon fiber reinforced polymer; Steel structures; Moderately elevated temperatures; Bond

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APA (6^th Edition):

Sahin, M. U. (2014). BOND BEHAVIOR BETWEEN STEEL AND HIGH MODULUS CFRP PLATES AT MODERATLEY ELEVATED TEMPERATURES. (Masters Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/1647

Chicago Manual of Style (16^th Edition):

Sahin, Mehmet Ugur. “BOND BEHAVIOR BETWEEN STEEL AND HIGH MODULUS CFRP PLATES AT MODERATLEY ELEVATED TEMPERATURES.” 2014. Masters Thesis, University of Houston. Accessed March 07, 2021. http://hdl.handle.net/10657/1647.

MLA Handbook (7^th Edition):

Sahin, Mehmet Ugur. “BOND BEHAVIOR BETWEEN STEEL AND HIGH MODULUS CFRP PLATES AT MODERATLEY ELEVATED TEMPERATURES.” 2014. Web. 07 Mar 2021.

Vancouver:

Sahin MU. BOND BEHAVIOR BETWEEN STEEL AND HIGH MODULUS CFRP PLATES AT MODERATLEY ELEVATED TEMPERATURES. [Internet] [Masters thesis]. University of Houston; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10657/1647.

Council of Science Editors:

Sahin MU. BOND BEHAVIOR BETWEEN STEEL AND HIGH MODULUS CFRP PLATES AT MODERATLEY ELEVATED TEMPERATURES. [Masters Thesis]. University of Houston; 2014. Available from: http://hdl.handle.net/10657/1647

University of New Mexico

12. Aboubakr, Sherif. Epoxy-clay nanocomposite for carbon fiber reinforced polymer applications.

Degree: Civil Engineering, 2013, University of New Mexico

URL: http://hdl.handle.net/1928/23165

► Carbon fiber reinforced polymer (CFRP) composites have been utilized in rehabilitation and strengthening of civil infrastructure, and fabrication of aerospace, automotive and marine structural components.… (more)

▼ Carbon fiber reinforced polymer (CFRP) composites have been utilized in rehabilitation and strengthening of civil infrastructure, and fabrication of aerospace, automotive and marine structural components. This is attributed to the high strength-to-weight ratio and durability of CFRP. However, for strengthening using externally bonded CFRP laminates, creep of epoxy adhesive at the CFRP interface can result in off-loading of the CFRP and inefficient structural strengthening. When the CFRP strengthened structure is subjected to sustained loads, creep of epoxy should be carefully considered and controlled. Moreover, utilization of CFRP in fabrication of such structural components is rapidly demanding the enhancement of the structural properties of CFRP composites. Since CFRP structural properties depend on both the fiber and matrix properties, enhancement in the properties of the matrix yields relative improvement of the structural properties of the CFRP composite. Moreover epoxy resin systems incorporating nanoclay (epoxy-clay nanocomposite) have recently been reported to generally display significant improvements in structural properties over neat epoxy. This research examines the possible control of creep of epoxy using nanoclay. A multi-scale investigation of creep behavior of the epoxy-clay nanocomposite was conducted including macrocreep behavior at the CFRP-steel interface by using double lap shear testing, followed by investigation of the nanocreep of an epoxy-clay nanocomposite using nanoindentation. In addition, a hybrid CFRP composite incorporating an epoxy-clay nanocomposite (NC-CFRP) was fabricated. The experiments showed nanoclay to have a significant effect on epoxy creep, and tensile, in-plane shear, and flexural properties of NC-CFRP. Moreover, nanoclay was proven to improve low-velocity impact responses as well as limit damage evolution. Microstructural, thermal and mechanical characterizations of the epoxy-clay nanocomposite were performed to explain the observed effects. Microstructural characterization included scanning electron microscope (SEM), X-ray diffraction (XRD), transmission electron microscope (TEM), and nuclear magnetic resonance (NMR) measurements. Thermal characterization involved thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) measurements. These measurements showed that intercalated and exfoliated nanoclay platelets have significantly different effects. Advisors/Committee Members: Reda Taha, Mahmoud, Maji, Arup, Lin-Shen, Y.

Subjects/Keywords: Epoxy-clay nanocomposite; Carbon fiber reinforced polymer (CFRP) composites; Microstructural characterizations; Creep; Nanoindentation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aboubakr, S. (2013). Epoxy-clay nanocomposite for carbon fiber reinforced polymer applications. (Masters Thesis). University of New Mexico. Retrieved from http://hdl.handle.net/1928/23165

Chicago Manual of Style (16^th Edition):

Aboubakr, Sherif. “Epoxy-clay nanocomposite for carbon fiber reinforced polymer applications.” 2013. Masters Thesis, University of New Mexico. Accessed March 07, 2021. http://hdl.handle.net/1928/23165.

MLA Handbook (7^th Edition):

Aboubakr, Sherif. “Epoxy-clay nanocomposite for carbon fiber reinforced polymer applications.” 2013. Web. 07 Mar 2021.

Vancouver:

Aboubakr S. Epoxy-clay nanocomposite for carbon fiber reinforced polymer applications. [Internet] [Masters thesis]. University of New Mexico; 2013. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1928/23165.

Council of Science Editors:

Aboubakr S. Epoxy-clay nanocomposite for carbon fiber reinforced polymer applications. [Masters Thesis]. University of New Mexico; 2013. Available from: http://hdl.handle.net/1928/23165

Penn State University

13. Pei, Shenli. Data-driven learning and modeling of carbon fiber reinforced polymer composites.

Degree: 2020, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/18059sbp5278

► Carbon-fiber-reinforced polymer (CFRP) composites are being widely used as lightweight and high strength material in aerospace and automotive industries, owing to their high specific modulus,… (more)

▼ Carbon-fiber-reinforced polymer (CFRP) composites are being widely used as lightweight and high strength material in aerospace and automotive industries, owing to their high specific modulus, high specific strength, and good corrosion and fatigue resistance. The material performance of CFRP composites highly depends on the material manufacturing process and the inherent internal microstructure. Therefore, this dissertation attempts to unveil the underlying process-structure and structure-property relations by integrating data science and informatics with microstructure characterization. Specifically, this dissertation focuses on developing analytical approaches for CFRP composites from X-ray computed tomography (XCT) images, a nondestructive testing, and three key research topics were identified. These topics include a) developing a 3D microstructure characterization approach for non-uniformly oriented CFRP composites, b) establishing physics-based features to quantify the spatiotemporal progression of tensile fractures in CFRP composites, and c) comprehending the process-structure-property (P-S-P) relations of fused filament fabricated CFRP composite through developing image-based analytical methods that quantitatively examines the microstructure variations and its effect on the tensile property. For the first research topic, a 3D microstructure analysis framework was developed to quantitatively analyze fiber morphology (e.g. fiber curvature, orientation, and length distribution) for non-uniformly orientated fiber systems using micro-XCT (µXCT) images. For this purpose, numerical image processing techniques and iterative local fiber-tracking approaches were developed to extract individual fibers from congested fiber systems, and statistical distribution of the fiber morphology was formulated using tensor representation. The derived statistics were integrated with the physics-based Halpin-Tsai model and laminate analogy to estimate the material modulus. The fidelity of the characterization was validated through experimental results for injection molded short and long CFRP composites, which provided a valid alternative for finite element analysis. For the second research topic, the spatiotemporal characterization of the fracture behavior of CFRP composites was established through the implementation of in-situ µXCT. The fracture features were automatically extracted from the 3D µXCT image using the image processing techniques, and physics-based features were developed to quantitatively measure the progression of failure behavior. The proposed characterization approach was implemented on sheet molding compound and injection molded CFRP composites, where the spatiotemporal characterization of fracture behavior was quantified and visualized. It provided insights into the microscale failure mechanism, and the validity of the proposed characterization approach was confirmed by the strain field calculation using a volumetric digital image correlation. For the third research topic, a P-S-P approach was proposed to unveil… Advisors/Committee Members: Hui Yang, Dissertation Advisor/Co-Advisor, Hui Yang, Committee Chair/Co-Chair, Soundar Kumara, Committee Member, Timothy W. Simpson, Outside Member, Danielle Zeng, Special Member, Jingjing Li, Committee Chair/Co-Chair, Jingjing Li, Dissertation Advisor/Co-Advisor, Steven James Landry, Program Head/Chair.

Subjects/Keywords: Carbon Fiber Reinforced Polymer Composite; micro X-ray Computed Tomography; microstructure informatics; mechanical property

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APA (6^th Edition):

Pei, S. (2020). Data-driven learning and modeling of carbon fiber reinforced polymer composites. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18059sbp5278

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pei, Shenli. “Data-driven learning and modeling of carbon fiber reinforced polymer composites.” 2020. Thesis, Penn State University. Accessed March 07, 2021. https://submit-etda.libraries.psu.edu/catalog/18059sbp5278.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pei, Shenli. “Data-driven learning and modeling of carbon fiber reinforced polymer composites.” 2020. Web. 07 Mar 2021.

Vancouver:

Pei S. Data-driven learning and modeling of carbon fiber reinforced polymer composites. [Internet] [Thesis]. Penn State University; 2020. [cited 2021 Mar 07]. Available from: https://submit-etda.libraries.psu.edu/catalog/18059sbp5278.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pei S. Data-driven learning and modeling of carbon fiber reinforced polymer composites. [Thesis]. Penn State University; 2020. Available from: https://submit-etda.libraries.psu.edu/catalog/18059sbp5278

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Berkeley

14. Moustafa, Mohamed Aly Abdel-Razik. Structural Behavior of Bent Cap Beams in As-built and Retrofitted Reinforced Concrete Box-Girder Bridges.

Degree: Civil and Environmental Engineering, 2014, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/1f02v32f

► Research on resilient infrastructure systems is expanding. As we experience more infrastructure deterioration in the US, numerous efforts are ongoing for building the nation's new… (more)

▼ Research on resilient infrastructure systems is expanding. As we experience more infrastructure deterioration in the US, numerous efforts are ongoing for building the nation's new infrastructure and maintaining the existing one. Bridges are key components of infrastructure that are vulnerable to earthquakes and are undergoing retrofit or complete replacement. Thus, optimized seismic design of new bridges and informed retrofit decisions are indispensable. A specific design issue that is concerned with the structural response of bent cap beams in as-built and retrofitted box-girder bridges under gravity and seismic loads is tackled in this dissertation. The lack of proper account of box-girder slabs contribution to the integral bent cap can lead to an uneconomical seismic design of new bridges or unfavorable mode of failure in retrofitting existing ones. A combined experimental and computational research was undertaken in this study to investigate the structural behavior and seismic response of bent cap beams in as-built and retrofitted reinforced concrete box-girder bridges under the combined effect of vertical and lateral loading. In particular, the contribution of the box-girder slabs to the stiffness and strength of the integral bent caps was evaluated for optimized design and enhanced capacity estimation. The computational part of the study consisted of two phases: pre-test and post-test analyses. The experimental program involved testing two 1/4-scale column-bent cap beam-box girder subassembly using quasi-static and Hybrid Simulation (HS) testing methods. The test specimens were adopted from a typical California bridge that is modified from the Caltrans Academy Bridge, and were designed in light of the most recent AASHTO and Caltrans provisions. The pre-test analysis phase of the computational research utilized one-, two-, and three-dimensional finite element models to carry out different linear and nonlinear static and time history analyses for both of the full prototype bridge and the test specimen. The pre-test analysis successfully verified the expected subassembly behavior and provided beneficial input for the experimental program. The first stage of the experimental program involved quasi-static cyclic loading tests of the first specimen in as-built and repaired conditions. Bidirectional cyclic loading tests in both transverse and longitudinal directions were conducted under constant gravity load. A rapid repair scheme was adopted for the tested specimen using a Carbon Fiber Reinforced Polymer (CFRP) column jacket. A similar quasi-static cyclic test to the as-built specimen was carried out for the repaired specimen for comparison purposes and to verify the essentially elastic status of the bent cap beam. The second stage of the experimental study embraced the HS testing technique for providing the lateral earthquake loading to the test specimens. A new practical approach that utilized readily available laboratory data acquisition systems as a middleware for feasible HS communication was achieved as part of…

Subjects/Keywords: Civil engineering; Bridge Engineering; Carbon Fiber Reinforced Polymer (CFRP); Finite Element Analysis; Hybrid Simulation; Large-scale Testing; Reinforced Concrete

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APA (6^th Edition):

Moustafa, M. A. A. (2014). Structural Behavior of Bent Cap Beams in As-built and Retrofitted Reinforced Concrete Box-Girder Bridges. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/1f02v32f

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Moustafa, Mohamed Aly Abdel-Razik. “Structural Behavior of Bent Cap Beams in As-built and Retrofitted Reinforced Concrete Box-Girder Bridges.” 2014. Thesis, University of California – Berkeley. Accessed March 07, 2021. http://www.escholarship.org/uc/item/1f02v32f.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Moustafa, Mohamed Aly Abdel-Razik. “Structural Behavior of Bent Cap Beams in As-built and Retrofitted Reinforced Concrete Box-Girder Bridges.” 2014. Web. 07 Mar 2021.

Vancouver:

Moustafa MAA. Structural Behavior of Bent Cap Beams in As-built and Retrofitted Reinforced Concrete Box-Girder Bridges. [Internet] [Thesis]. University of California – Berkeley; 2014. [cited 2021 Mar 07]. Available from: http://www.escholarship.org/uc/item/1f02v32f.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Moustafa MAA. Structural Behavior of Bent Cap Beams in As-built and Retrofitted Reinforced Concrete Box-Girder Bridges. [Thesis]. University of California – Berkeley; 2014. Available from: http://www.escholarship.org/uc/item/1f02v32f

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Iowa

15. Heiderscheit, Timothy Donald. Comparative study of near-infrared pulsed laser machining of carbon fiber reinforced plastics.

Degree: MS, Mechanical Engineering, 2017, University of Iowa

URL: https://ir.uiowa.edu/etd/5946

► Carbon fiber-reinforced plastics (CFRPs) have gained widespread popularity as a lightweight, high-strength alternative to traditional materials. The unique anisotropic properties of CFRP make processing… (more)

▼ Carbon fiber-reinforced plastics (CFRPs) have gained widespread popularity as a lightweight, high-strength alternative to traditional materials. The unique anisotropic properties of CFRP make processing difficult, especially using conventional methods. This study investigates laser cutting by ablation as an alternative by comparing two near-infrared laser systems to a typical mechanical machining process. This research has potential applications in the automotive and aerospace industries, where CFRPs are particularly desirable for weight savings and fuel efficiency. First, a CNC mill was used to study the effects of process parameters and tool design on machining quality. Despite high productivity and flexible tooling, mechanical drilling suffers from machining defects that could compromise structural performance of a CFRP component. Rotational feed rate was shown to be the primary factor in determining the axial thrust force, which correlated with the extent of delamination and peeling. Experimental results concluded that machining quality could be improved using a non-contact laser-based material removal mechanism. Laser machining was investigated first with a Yb:YAG fiber laser system, operated in either continuous wave or pulse-modulated mode, for both cross-ply and woven CFRP. For the first time, energy density was used as a control variable to account for changes in process parameters, predicting a logarithmic relationship with machining results attributable to plasma shielding effects. Relevant process parameters included operation mode, laser power, pulse overlap, and cross-ply surface fiber orientation, all of which showed a significant impact on single-pass machining quality. High pulse frequency was required to successfully ablate woven CFRP at the weave boundaries, possibly due to matrix absorption dynamics. Overall, the Yb:YAG fiber laser system showed improved performance over mechanical machining. However, microsecond pulses cause extensive thermal damage and low ablation rates due to long laser-material interaction time and low power intensity. Next, laser machining was investigated using a high-energy nanosecond-pulsed Nd:YAG NIR laser operating in either Q-Switch or Long Pulse mode. This research demonstrates for the first time that keyhole-mode cutting can be achieved for CFRP materials using a high-energy nanosecond laser with long-duration pulsing. It is also shown that short-duration Q-Switch mode results in an ineffective cutting performance for CFRP, likely due to laser-induced optical breakdown. At sufficiently high power intensity, it is hypothesized that the resulting plasma absorbs a significant portion of the incoming laser energy by the inverse Bremsstrahlung mechanism. In Long Pulse mode, multi-pass line and contour cutting experiments are further performed to investigate the effect of laser processing parameters on thermal damage and machined surface integrity. A logarithmic trend was observed for machining results, attributable to plasma shielding similar to… Advisors/Committee Members: Ding, Hongtao (supervisor).

Subjects/Keywords: Carbon fiber reinforced polymer; Fiber laser; Keyhole; Laser cutting; Long duration; Nanosecond pulse laser; Mechanical Engineering

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APA (6^th Edition):

Heiderscheit, T. D. (2017). Comparative study of near-infrared pulsed laser machining of carbon fiber reinforced plastics. (Masters Thesis). University of Iowa. Retrieved from https://ir.uiowa.edu/etd/5946

Chicago Manual of Style (16^th Edition):

Heiderscheit, Timothy Donald. “Comparative study of near-infrared pulsed laser machining of carbon fiber reinforced plastics.” 2017. Masters Thesis, University of Iowa. Accessed March 07, 2021. https://ir.uiowa.edu/etd/5946.

MLA Handbook (7^th Edition):

Heiderscheit, Timothy Donald. “Comparative study of near-infrared pulsed laser machining of carbon fiber reinforced plastics.” 2017. Web. 07 Mar 2021.

Vancouver:

Heiderscheit TD. Comparative study of near-infrared pulsed laser machining of carbon fiber reinforced plastics. [Internet] [Masters thesis]. University of Iowa; 2017. [cited 2021 Mar 07]. Available from: https://ir.uiowa.edu/etd/5946.

Council of Science Editors:

Heiderscheit TD. Comparative study of near-infrared pulsed laser machining of carbon fiber reinforced plastics. [Masters Thesis]. University of Iowa; 2017. Available from: https://ir.uiowa.edu/etd/5946

University of New South Wales

16. Kourloufas, Christopher. Effect of Saltwater Absorption/Desorption Cycling on Strength of Carbon Fibre/Epoxy Composites.

Degree: Engineering & Information Technology Canberra, 2016, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/57029 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42292/SOURCE02?view=true

► The use of carbon/epoxy composites is ever increasing in the aerospace industry. The topic of saltwater absorption/desorption cycling effects is of interest as aircraft will… (more)

▼ The use of carbon/epoxy composites is ever increasing in the aerospace industry. The topic of saltwater absorption/desorption cycling effects is of interest as aircraft will experience significant moisture absorption/desorption and thermal cycles both during the short time scale of a sortie, as well as during the long time scale of service life. Coupled with this is exposure to elements, such as salt, from the environment. Carbon/epoxy materials are known to absorb moisture throughout their service life, and the extent of this absorption and its effects on the material may be estimated. It is generally assumed that the effects of fresh water absorption are reversible upon drying with respect to some basic characteristics such as glass transition temperature and associated mechanical properties. It is also acknowledged that repeated fresh water cycling does not have significant negative effects. However, the effect of a very common component of the environment, salt (NaCl), has had little attention in the research to-date. It has been seen in the few experiments conducted on carbon/epoxy, that saltwater/seawater conditioning degrades matrix-dominated properties to a greater degree than fresh water conditioning.The effects of repeated cycles of saltwater absorption/desorption on short-beam strength of carbon/epoxy composite materials are explored in this thesis. Experiments were conducted on Toray T700S/Cytec MTM57 plain weave carbon/epoxy composite material. The material was exposed to four cycles of immersion to saturation and drying and the gravimetric results obtained. The diffusion constants for absorption of fresh water and of salt water were obtained. Finally, the short-beam strength was tested for saltwater-cycled versus as-manufactured Toray T700S/Cytec MTM57 material. A relative reduction in strength of approximately 10% was observed.These results indicate that cycles of saltwater have irreversible effects. And further studies into the effects of the cyclic saltwater environment may be useful for the development of design allowables of composite materials employed in aircraft. Advisors/Committee Members: Morozov, Evgeny, Engineering & Information Technology, UNSW Canberra, UNSW, Heslehurst, Rikard, Engineering & Information Technology, UNSW Canberra, UNSW, Shankar, Krishna, Engineering & Information Technology, UNSW Canberra, UNSW.

Subjects/Keywords: Composite; Absorption; Desorption; Salt Water; Carbon Fiber Reinforced Polymer; Absorption/Desorption Cycling; Carbon/Epoxy; Composite; Cyclic Environmental Testing

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APA (6^th Edition):

Kourloufas, C. (2016). Effect of Saltwater Absorption/Desorption Cycling on Strength of Carbon Fibre/Epoxy Composites. (Masters Thesis). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/57029 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42292/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Kourloufas, Christopher. “Effect of Saltwater Absorption/Desorption Cycling on Strength of Carbon Fibre/Epoxy Composites.” 2016. Masters Thesis, University of New South Wales. Accessed March 07, 2021. http://handle.unsw.edu.au/1959.4/57029 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42292/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Kourloufas, Christopher. “Effect of Saltwater Absorption/Desorption Cycling on Strength of Carbon Fibre/Epoxy Composites.” 2016. Web. 07 Mar 2021.

Vancouver:

Kourloufas C. Effect of Saltwater Absorption/Desorption Cycling on Strength of Carbon Fibre/Epoxy Composites. [Internet] [Masters thesis]. University of New South Wales; 2016. [cited 2021 Mar 07]. Available from: http://handle.unsw.edu.au/1959.4/57029 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42292/SOURCE02?view=true.

Council of Science Editors:

Kourloufas C. Effect of Saltwater Absorption/Desorption Cycling on Strength of Carbon Fibre/Epoxy Composites. [Masters Thesis]. University of New South Wales; 2016. Available from: http://handle.unsw.edu.au/1959.4/57029 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:42292/SOURCE02?view=true

Indian Institute of Science

17. Sudha, J. Fatigue Damage Characterization Of Carbon/Epoxy Laminates Under Spectrum Loading.

Degree: MSc Engg, Faculty of Engineering, 2013, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/2257

► Fibre Reinforced Polymer Composites are extensively used in aircraft structures because of its high specific stiffness, high specific strength and tailorability. Though Fibre Reinforced Polymers… (more)

▼ Fibre Reinforced Polymer Composites are extensively used in aircraft structures because of its high specific stiffness, high specific strength and tailorability. Though Fibre Reinforced Polymers offer many advantages, they are not free from problems. The damage of different nature, e.g., service mechanical damages, fatigue damage or environmental damage can be observed during operating conditions. Among all the damages, manufacturing or service induced, delamination related damage is the most important failure mechanisms of aircraft-composite structures and can be detrimental for safety. Delamination growth under fatigue loading may take place due to local buckling, growth from free edges and notches such as holes, growth from ply-drops and impact damaged composites containing considerable delamination. Delamination growth can also occur due to interlaminar stresses, which can arise in complex structures due to unanticipated loading. The complex nature of composite failure, involving different failure modes and their interactions, makes it necessary to characterize/identify the relevant parameters for fatigue damage resistance, accumulation and life prediction. An effort has been made in this thesis to understand the fatigue behavior of carbon fibre reinforced epoxy laminates under aircraft wing service loading conditions. The study was made on laminates with different lay-up sequences (quasi-isotropic and fibre dominated) and different geometries (plain specimen, specimen with a hole and ply-drop specimen). The fatigue behaviour of the composite was analyzed by following methods: . Ultrasonic C-Scan was used to characterize the delamination growth. . Dynamic Mechanical Analysis (DMA) was done to study the interfacial degradation due to fatigue loading. In this analysis, the interfacial strength indicator and interfacial damping were calculated. The DMA also provides the storage modulus degradation under fatigue loading. . Scanning electron microscope examination was carried out to understand the fatigue damage mechanisms. . A semi-empirical phenomenological model was also used to estimate the residual fatigue life. This research work reveals that the Carbon Fibre Reinforced Polymer laminates are in the safe limit under service loading conditions, except the specimen with a hole. The specimen with a hole showed delaminations around the hole due to stress concentration and higher interlaminar stresses at the hole edges and this delamination is found to be associated with fibre breakage and fibre pullout. The quasi-isotropic laminate is found to show poorer fatigue behaviour when compared to fibre dominated laminate and ply-drop also shows poor performance due to high stress concentration in the ply-drop region. Advisors/Committee Members: Kumar, Subodh (advisor).

Subjects/Keywords: Carbon/Epoxy Laminates - Fatigue; Carbon Fiber Reinforced Polymer Laminates; Carbon Fibre Reinforced Epoxy Composites; Aircraft-Composite Structures - Fatigue; Aerospace Materials - Fatigue; Dynamic Mechanical Analysis; Materials Science

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sudha, J. (2013). Fatigue Damage Characterization Of Carbon/Epoxy Laminates Under Spectrum Loading. (Masters Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2257

Chicago Manual of Style (16^th Edition):

Sudha, J. “Fatigue Damage Characterization Of Carbon/Epoxy Laminates Under Spectrum Loading.” 2013. Masters Thesis, Indian Institute of Science. Accessed March 07, 2021. http://etd.iisc.ac.in/handle/2005/2257.

MLA Handbook (7^th Edition):

Sudha, J. “Fatigue Damage Characterization Of Carbon/Epoxy Laminates Under Spectrum Loading.” 2013. Web. 07 Mar 2021.

Vancouver:

Sudha J. Fatigue Damage Characterization Of Carbon/Epoxy Laminates Under Spectrum Loading. [Internet] [Masters thesis]. Indian Institute of Science; 2013. [cited 2021 Mar 07]. Available from: http://etd.iisc.ac.in/handle/2005/2257.

Council of Science Editors:

Sudha J. Fatigue Damage Characterization Of Carbon/Epoxy Laminates Under Spectrum Loading. [Masters Thesis]. Indian Institute of Science; 2013. Available from: http://etd.iisc.ac.in/handle/2005/2257

18. Nel, Jan Heimriks. Development and characterisation of a carbon fibre reinforced MAX phase composite material.

Degree: MEng, Mechanical and Mechatronic Engineering, 2017, Stellenbosch University

URL: http://hdl.handle.net/10019.1/102884

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ENGLISH ABSTRACT: A carbon fibre reinforced MAX phase ceramic matrix composite (CMC) was produced in prepreg form and sintered using spark plasma sintering (SPS). MAX… (more)

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ENGLISH ABSTRACT: A carbon fibre reinforced MAX phase ceramic matrix composite (CMC) was produced in prepreg form and sintered using spark plasma sintering (SPS). MAX phase ceramics is a group of ternary ceramics exhibiting a combination of advantageous properties of both metals and ceramics. The CMC prepreg was designed with a carbon fibre weave acting as reinforcement and a MAX phase (Ti2AlC) acting as the matrix. Polymethyl methacrylate (PMMA) was used to coat the fibres and Ti2AlC powder combination to achieve a flexible and robust prepreg. Ti2AlC powder was prepared by attrition milling in a liquid medium. The particle size distribution was measured using dynamic light scattering (DLS) and scanning electron microscopy (SEM). The mean particle size was reduced from 16 cm to 275 nm, allowing infiltration of the powder into a fibre weave. The effect of the attrition milling on the elemental composition of the powder was evaluated using energy dispersive spectroscopy (EDS) and powder X-ray diffraction (PXRD). Electrophoretic deposition (EPD), vacuum infiltration, and pressure infiltration were evaluated for ceramic infiltration into a carbon fibre weave. The ceramic infiltration was investigated by examining polished cross-sections using optical microscopy. Prepreg layers were combined and thermal debinding was performed at 400 °C to remove the PMMA coating. The CMC was sintered using SPS at 20 MPa and 1400 °C to create a 30 mm CMC disc. The sintered CMC had a density of 2.04 g/cm3 and open porosity of 16 %. The microstructure of the CMC was evaluated using optical microscopy, SEM, and X-ray computed tomography (CT). The discs were fractured using the ball on three balls (B3B) test method to determine the strength and mechanical response. EDS and SEM analysis was employed to evaluate diffusion between carbon fibres and Ti2AlC matrix. Aluminium diffused from the matrix into the fibres, resulting in the formation of Al4C3 in the carbon fibre and TiC in the matrix surrounding the fibre.

AFRIKAANSE OPSOMMING: 'n Koolstof-versterkte MAX-fase keramieksamestelling was in 'prepreg' vorm gelewer en gesinter deur gebruik te maak van vonk plamsa-sintering (VPS). MAX-fase keramieke is n drieledige groep keramieke wat n kombinasie van bevorderlike eienskappe van beide metale en keramieke bevat. Die keramieksamestelling is ontwerp met n koolstofveselweefstof wat as n versterker en n MAX-fase (Ti2AlC) wat as n matriks optree. 'n Bindstof (PMMA) was gebruik om die vesels en Ti2AlC-poeier kombinasie te bedek om n buigsame en sterk 'prepreg' te lewer. Ti2AlC-poeier is deur middel van afslytingsmaling in n vloeibare medium voorberei. Die partikelgrootte is deur dinamiese straalstrooiing en skanderings-elektronmikroskopie (SEM) gemeet. Die mediaan partikelgrootte is van 16 µmm na 275 nm verminder wat toelaat dat die poeier die weefstof in ltreer. Die uitwerking van die afslytingsmaling op die poeier se elementale samestelling is deur middel van energie-verstrooings-spektroskopie (EVS) en poeier X-straaldi…

Advisors/Committee Members: Blaine, D. C., Sigalas, I., Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering..

Subjects/Keywords: Carbon fiber-reinforced; Fiber-reinforced ceramics; UCTD; Composite materials

10 more images…

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APA (6^th Edition):

Nel, J. H. (2017). Development and characterisation of a carbon fibre reinforced MAX phase composite material. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/102884

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nel, Jan Heimriks. “Development and characterisation of a carbon fibre reinforced MAX phase composite material.” 2017. Thesis, Stellenbosch University. Accessed March 07, 2021. http://hdl.handle.net/10019.1/102884.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nel, Jan Heimriks. “Development and characterisation of a carbon fibre reinforced MAX phase composite material.” 2017. Web. 07 Mar 2021.

Vancouver:

Nel JH. Development and characterisation of a carbon fibre reinforced MAX phase composite material. [Internet] [Thesis]. Stellenbosch University; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10019.1/102884.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nel JH. Development and characterisation of a carbon fibre reinforced MAX phase composite material. [Thesis]. Stellenbosch University; 2017. Available from: http://hdl.handle.net/10019.1/102884

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

19. George Wilton Albuquerque Rangel. Avaliação do desempenho estrutural de painéis de alvenaria de blocos de concreto reforçados com PRFC.

Degree: 2013, Federal University of Uberlândia

URL: http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4768 ; http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4769

►

O objetivo deste trabalho foi analisar o desempenho estrutural de painéis de alvenaria de blocos de concreto reforçados com polímero reforçado com fibras de carbono… (more)

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O objetivo deste trabalho foi analisar o desempenho estrutural de painéis de alvenaria de blocos de concreto reforçados com polímero reforçado com fibras de carbono (PRFC). A justificativa dessa análise embasa-se no fato que o método construtivo em alvenaria estrutural não permite alterações em sua concepção arquitetônica, uma vez que os próprios elementos de vedação são elementos estruturais, necessitando então de estudos que indiquem a viabilidade técnica do reforço das paredes com PRFC para solução desse problema. Para isso, além da resistência, tal análise se concentrou em avaliar a variação da rigidez de painéis não reforçados e posteriormente reforçados, submetidos a um carregamento de compressão uniformemente distribuído equivalente a 60 % da carga prevista de ruptura e posteriormente à ruptura. Dentre diversas combinações de parâmetros interferentes no resultado, optou-se em focar a análise das interações entre a quantidade de faixas de PRFC e as posições de aplicação. Além da análise numérica e experimental dos painéis não reforçados, também foram ensaiados blocos e prismas reforçados com PRFC que serviram de parâmetro para melhor entendimento do sistema de reforço em alvenaria. Por fim, verificou-se a eficiência do uso de PRFC no reforço da alvenaria estrutural, conhecendo a influência do número de faixas de reforço e sua posição ideal de aplicação.

The objective of this study was to analyze the structural performance of masonry panels of concrete blocks reinforced with polymer reinforced with carbon fiber (CFRP). The justification for this analysis is the fact that the structural masonry construction method does not allow changes in its architectural design, since the actual sealing elements are structural elements, so needing studies that indicate the technical viability the strengthening of the walls with CFRP for the solution of this problem. For this, beyond resistance, such analysis was focused on evaluating the variation of stiffness of the panel when unreinforced then reinforced, loaded with an uniformly distributed compressive strength, corresponding to 60 % of the final expected load and subsequently to rupture. Among various combinations of parameters interfering in the result, was opted to analysis the interactions between the amount of CFRP strips and their positions. Besides the numerical and experimental analysis of the unreinforced panels, were also tested blocks and prisms reinforced with CFRP which were served as a parameter for better understanding of masonry reinforcement system. Finally, it was verified the efficiency of the use of CFRP in strengthening of the masonry, knowing the influence of the number of strips and the ideal position application.

Advisors/Committee Members: Paulo Cesar Primo Agostinho, Dogmar Antonio de Souza Junior, Antônio Carlos dos Santos, Wayne Santos de Assis.

Subjects/Keywords: Polímero reforçado com fibras de carbono; PRFC; Reforço estrutural; Alvenaria estrutural; ENGENHARIA CIVIL; Carbon fiber reinforced polymer; Structural reinforcement; CFRP; Masonry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rangel, G. W. A. (2013). Avaliação do desempenho estrutural de painéis de alvenaria de blocos de concreto reforçados com PRFC. (Thesis). Federal University of Uberlândia. Retrieved from http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4768 ; http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4769

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rangel, George Wilton Albuquerque. “Avaliação do desempenho estrutural de painéis de alvenaria de blocos de concreto reforçados com PRFC.” 2013. Thesis, Federal University of Uberlândia. Accessed March 07, 2021. http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4768 ; http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4769.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rangel, George Wilton Albuquerque. “Avaliação do desempenho estrutural de painéis de alvenaria de blocos de concreto reforçados com PRFC.” 2013. Web. 07 Mar 2021.

Vancouver:

Rangel GWA. Avaliação do desempenho estrutural de painéis de alvenaria de blocos de concreto reforçados com PRFC. [Internet] [Thesis]. Federal University of Uberlândia; 2013. [cited 2021 Mar 07]. Available from: http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4768 ; http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4769.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rangel GWA. Avaliação do desempenho estrutural de painéis de alvenaria de blocos de concreto reforçados com PRFC. [Thesis]. Federal University of Uberlândia; 2013. Available from: http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4768 ; http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=4769

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Urbana-Champaign

20. Calzada, Kevin A. Modeling and Interpretation of Fiber Orientation-Based Failure Mechanisms in Machining of Carbon Fiber-Reinforced Composites.

Degree: MS, 0133, 2011, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/18215

► Fiber-reinforced polymer composites have recently emerged as novel materials capable of playing a unique role in industrial applications. The advantage of these materials over traditional… (more)

▼ Fiber-reinforced polymer composites have recently emerged as novel materials capable of playing a unique role in industrial applications. The advantage of these materials over traditional metals or polymers comes from the material property enhancements that can be achieved by combining appropriate fiber and matrix materials into the microstructure. While these materials have recently become popularized, many complications arise in the manufacturing process of the two-phase microstructures, specifically in the machining of FRP composites. Due to the complex nature of FRP two-phase microstructures, the fiber failure mechanisms occurring in the machining process are not fully understood. Many experimental and modeling techniques have been implemented to more fully explain the nature of the fiber failure mechanisms in the machining process, but these have fallen short of a complete understanding of the machining complexities. This research seeks to gain a fundamental understanding of the fiber orientation-based fiber failure mechanisms occurring in the micro-machining of FRP composites by employing two unique modeling techniques. In this research, both experimental and finite element-based modeling approaches are undertaken. Fibers oriented in 0, 45, 90, and 135 degrees with respect to the direction of tool motion are investigated and unique failure theories are developed for each of these orientations. The model based on experimental observations is focused on explaining the micro-scale failure mechanisms occurring in the machining process. The finite element machining model developed in this work uses a unique modeling approach, which is capable of explaining the fiber failure mechanisms occurring throughout the chip formation process. After development of the two machining models, the machining responses are compared to a set of machining experiments for validation purposes. ii Fibers orientated in the 45 and 90 degree orientations were found to fail in compressive crushing-dominated failure while fibers oriented in the 135 degree orientation were found to fail in bending below the surface of the cut. In the 0 degree orientation, the fibers were proposed to fail in buckling or bending-dominated failure, depending on the depth of cut, and tool geometry of the process. The micro-scale fiber failure mechanisms were observed to differ significantly from their macro-scale counterparts. The machining responses of the two models were found to agree well with the experimental validation analyses indicating that these models are an accurate representation of the chip formation process. Advisors/Committee Members: Kapoor, Shiv G. (advisor).

Subjects/Keywords: Aligned carbon fiber-reinforced polymer composites (CFRP) composites; Micro-machining; Finite element model; Failure mechanisms; Interface modeling

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APA (6^th Edition):

Calzada, K. A. (2011). Modeling and Interpretation of Fiber Orientation-Based Failure Mechanisms in Machining of Carbon Fiber-Reinforced Composites. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/18215

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Calzada, Kevin A. “Modeling and Interpretation of Fiber Orientation-Based Failure Mechanisms in Machining of Carbon Fiber-Reinforced Composites.” 2011. Thesis, University of Illinois – Urbana-Champaign. Accessed March 07, 2021. http://hdl.handle.net/2142/18215.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Calzada, Kevin A. “Modeling and Interpretation of Fiber Orientation-Based Failure Mechanisms in Machining of Carbon Fiber-Reinforced Composites.” 2011. Web. 07 Mar 2021.

Vancouver:

Calzada KA. Modeling and Interpretation of Fiber Orientation-Based Failure Mechanisms in Machining of Carbon Fiber-Reinforced Composites. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2142/18215.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Calzada KA. Modeling and Interpretation of Fiber Orientation-Based Failure Mechanisms in Machining of Carbon Fiber-Reinforced Composites. [Thesis]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/18215

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Minnesota

21. Haghiashtiani, Ghazaleh. Applying the DMAIC method for developing a PVDF matrix composite for integrated structural load sensing.

Degree: MS, Engineering management, 2014, University of Minnesota

URL: http://hdl.handle.net/11299/166775

► This thesis introduces a new carbon fiber reinforced composite structure that uses polyvinylidene difluoride (PVDF) as the matrix material instead of the polymers that are… (more)

Subjects/Keywords: Carbon fiber reinforced polymer; DMAIC method; Piezoelectricity; Polyvinylidene difluoride (PVDF); Smart composite; Structural health monitoring; Engineering management

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Haghiashtiani, G. (2014). Applying the DMAIC method for developing a PVDF matrix composite for integrated structural load sensing. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/166775

Chicago Manual of Style (16^th Edition):

Haghiashtiani, Ghazaleh. “Applying the DMAIC method for developing a PVDF matrix composite for integrated structural load sensing.” 2014. Masters Thesis, University of Minnesota. Accessed March 07, 2021. http://hdl.handle.net/11299/166775.

MLA Handbook (7^th Edition):

Haghiashtiani, Ghazaleh. “Applying the DMAIC method for developing a PVDF matrix composite for integrated structural load sensing.” 2014. Web. 07 Mar 2021.

Vancouver:

Haghiashtiani G. Applying the DMAIC method for developing a PVDF matrix composite for integrated structural load sensing. [Internet] [Masters thesis]. University of Minnesota; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/11299/166775.

Council of Science Editors:

Haghiashtiani G. Applying the DMAIC method for developing a PVDF matrix composite for integrated structural load sensing. [Masters Thesis]. University of Minnesota; 2014. Available from: http://hdl.handle.net/11299/166775

University of New South Wales

22. Chowdhury, Mohammad Shakar. Application of System Identification using ERA/NExT for Damage Assessment in Composite Laminates.

Degree: Engineering & Information Technology, 2017, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/57569 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44102/SOURCE02?view=true

► Polymer matrix composites are widely used in aircraft structures due to their superior specific stiffness and strength. However, laminated composites are susceptible to delaminations due… (more)

▼ Polymer matrix composites are widely used in aircraft structures due to their superior specific stiffness and strength. However, laminated composites are susceptible to delaminations due to the low interlaminar fracture toughness of the matrix. Traditional NDI techniques for damage detection involve significant costs due to the requirement for the grounding of aircraft, shutdown time, and labour involved in inspections. Vibration monitoring for damage assessment in aircraft has several advantages such as being applicable in situ, not requiring external excitation and the potential for application as a continuous structural health monitoring system. Frequency monitoring is employed in modern aircraft for engine diagnostics and identification of major faults; however, when applied to structural components, monitoring frequency shifts only identifies the presence of damage but not its exact location and severity. Eigensystem Realization Algorithm (ERA) has been proposed for application to many structural components but not for assessment of delamination in composites.This thesis proposes the application of ERA coupled with Natural Excitation Technique (NExT) for delamination assessment in laminated composite structures, including stiffened composite panels. NExT provides the advantages that any type of excitation of the structure can be employed and the location of the excitation point need not be known. The algorithm for delamination assessment using ERA coupled with NExT was developed using Matlab code. The proposed method is first investigated and validated using transient vibration response generated by finite element simulation of composite laminates with delaminations. The simulated response is fed into the ERA/NExT algorithm to identify changes in the system parameters to estimate the location and reductions in bending stiffness in the damaged areas. The use of different types of excitation modes and excitations provided at different locations have been examined. Sensitivity analyses have been performed conducted study the influence of spacing of measurement points on the accuracy of delamination size and severity estimated using responses by numerical modelling of composite beams and laminated plates. The proposed method is validated experimentally with vibration measurements conducted on laminated carbon/epoxy beams, plates and stiffened panels with embedded delaminations and estimating the location, size and severity of the delaminations in the samples from the measured dynamic responses. Advisors/Committee Members: Shankar, Krishna, Engineering & Information Technology, UNSW Canberra, UNSW, Morozov, Evgeny, Engineering & Information Technology, UNSW Canberra, UNSW.

Subjects/Keywords: Eigensystem Realisation Algorithm; Vibration; Structural Health Monitoring; Natural Excitation Technique; Damage Assessment; Carbon Fiber Reinforced Polymer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chowdhury, M. S. (2017). Application of System Identification using ERA/NExT for Damage Assessment in Composite Laminates. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/57569 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44102/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Chowdhury, Mohammad Shakar. “Application of System Identification using ERA/NExT for Damage Assessment in Composite Laminates.” 2017. Doctoral Dissertation, University of New South Wales. Accessed March 07, 2021. http://handle.unsw.edu.au/1959.4/57569 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44102/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Chowdhury, Mohammad Shakar. “Application of System Identification using ERA/NExT for Damage Assessment in Composite Laminates.” 2017. Web. 07 Mar 2021.

Vancouver:

Chowdhury MS. Application of System Identification using ERA/NExT for Damage Assessment in Composite Laminates. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2021 Mar 07]. Available from: http://handle.unsw.edu.au/1959.4/57569 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44102/SOURCE02?view=true.

Council of Science Editors:

Chowdhury MS. Application of System Identification using ERA/NExT for Damage Assessment in Composite Laminates. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/57569 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:44102/SOURCE02?view=true

University of Texas – Austin

23. Resendez, Yadhira Aracely. Monitoring of an outdoor exposure site : evaluating different treatment methods for mitigation of alkali-silica reactivity in hardened concrete.

Degree: MSin Engineering, Civil Engineering, 2011, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2011-05-3606

► This research project, funded by the Federal Highway Administration, entails the construction of an outdoor exposure site in order to evaluate various methods for mitigating… (more)

Subjects/Keywords: Alkali silica reactivity; ASR; Concrete; Mitigation; Silane; Lithium nitrate; Deicers; Carbon fiber; Asphalt overlay; Concrete overlay; Reinforced polymer

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Resendez, Y. A. (2011). Monitoring of an outdoor exposure site : evaluating different treatment methods for mitigation of alkali-silica reactivity in hardened concrete. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-05-3606

Chicago Manual of Style (16^th Edition):

Resendez, Yadhira Aracely. “Monitoring of an outdoor exposure site : evaluating different treatment methods for mitigation of alkali-silica reactivity in hardened concrete.” 2011. Masters Thesis, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/ETD-UT-2011-05-3606.

MLA Handbook (7^th Edition):

Resendez, Yadhira Aracely. “Monitoring of an outdoor exposure site : evaluating different treatment methods for mitigation of alkali-silica reactivity in hardened concrete.” 2011. Web. 07 Mar 2021.

Vancouver:

Resendez YA. Monitoring of an outdoor exposure site : evaluating different treatment methods for mitigation of alkali-silica reactivity in hardened concrete. [Internet] [Masters thesis]. University of Texas – Austin; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3606.

Council of Science Editors:

Resendez YA. Monitoring of an outdoor exposure site : evaluating different treatment methods for mitigation of alkali-silica reactivity in hardened concrete. [Masters Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3606

24. Kosmidou, Parthena - Maria. Μηχανισμοί αστοχίας και πειραματική διερεύνηση στοιχείων ωπλισμένου σκυροδέματος με προβλήματα διάτμησης.

Degree: 2020, Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ)

URL: http://hdl.handle.net/10442/hedi/48692

► The use of composite materials (Fiber Reinforced Polymers - FRP) as internal and strengthening reinforcement in concrete structural members is becoming increasingly apparent. The ageing… (more)

▼ The use of composite materials (Fiber Reinforced Polymers - FRP) as internal and strengthening reinforcement in concrete structural members is becoming increasingly apparent. The ageing of the materials, the poorly detailed concrete members of the existing old Reinforced Concrete (RC) structures designed prior to 1970, the exposure of extremely important (RC) structures (e.g. bridges, highways etc.) in high corrosive environment owing to climate conditions or chemicals and the design requirements of modern seismic codes have led since several years the scientific community to investigate alternative methods of reinforcing and strengthening of the structural elements. In some cases, the use of FRP materials seem to be more advantageous than the use of the conventional steel reinforcement.The present research focuses on the investigation of innovative materials as main internal reinforcement or strengthening reinforcement of RC members with shear problems under monotonic and cyclic loading. The main axis is the interpretation and understanding the parameters that affect and determine the overall behaviour and failure mechanisms of these elements. For this purpose, an extensive experimental program was carried out which was divided into three parts.The first part concerns the experimental and analytical investigation of the use of Carbon FPR bars (C-FRP bars) as the main longitudinal reinforcement of structural RC members. In comparison with other commercially available FRP bars with lower cost such as FRP of glass fibers (G-FRP bars) C-FRP bars exhibit higher tensile strength and modulus of elasticity and an excellent corrosive resistance in harsh and aggressive environments (Fib bulletin 40 2007, ACI 440.1R-15 2015). In the first phase, seven (7) slender RC beams with rectangular cross-section were constructed and tested under 4-point monotonic loading with constantly increasing deformation: two (2) beams are reinforced with conventional steel tensional bars as the reference specimens and five (5) with C-FRP bars. Two types of C-FRP bars with different nominal diameter were chosen (df = 5.5 mm and df = 10 mm). The examined specimens were designed according to the design guidelines of ACI 440.1R-15 (2015). Special attention has been given on the bond conditions of the anchorage lengths of the tensile C-FRP bars. In this direction, an additional enhanced anchorage configuration along the straight anchorage length of the tensional FRP bars consisted of a continuous mild steel spiral with circular shape was also investigated. According to the experimental observations useful findings have been conducted regarding the overall response and the failure mechanism of these structural members.Concerning the analytical part of this research a feasible and easy-to-apply numerical approach for the evaluation of the flexural and the shear strength of slender concrete beams reinforced with longitudinal FRP bars, with or without steel stirrups, and consequently for the prediction of the expected failure mode is proposed. A unified…

Subjects/Keywords: Δοκοί; Ακραίοι κόμβοι δοκού-υποστυλώματος; Ωπλισμένο σκυρόδεμα; Ινωπλισμένο σκυρόδεμα; Χαλύβδινες ίνες; Ράβδοι ΙΩΠ με ίνες άνθρακα; Κορδόνια με ίνες άνθρακα; Ενίσχυση; Διάτμηση; BEAMS; External beam-column joints; Reinforced concrete (RC); Steel fiber-reinforced concrete (SFRC); Carbon fiber-reinforced polymer (C-FRP) bars; Carbon fiber-reinforced polymer (C-FRP) ropes; Strengthening; Shear

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kosmidou, P. -. M. (2020). Μηχανισμοί αστοχίας και πειραματική διερεύνηση στοιχείων ωπλισμένου σκυροδέματος με προβλήματα διάτμησης. (Thesis). Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ). Retrieved from http://hdl.handle.net/10442/hedi/48692

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kosmidou, Parthena - Maria. “Μηχανισμοί αστοχίας και πειραματική διερεύνηση στοιχείων ωπλισμένου σκυροδέματος με προβλήματα διάτμησης.” 2020. Thesis, Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ). Accessed March 07, 2021. http://hdl.handle.net/10442/hedi/48692.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kosmidou, Parthena - Maria. “Μηχανισμοί αστοχίας και πειραματική διερεύνηση στοιχείων ωπλισμένου σκυροδέματος με προβλήματα διάτμησης.” 2020. Web. 07 Mar 2021.

Vancouver:

Kosmidou P-M. Μηχανισμοί αστοχίας και πειραματική διερεύνηση στοιχείων ωπλισμένου σκυροδέματος με προβλήματα διάτμησης. [Internet] [Thesis]. Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ); 2020. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10442/hedi/48692.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kosmidou P-M. Μηχανισμοί αστοχίας και πειραματική διερεύνηση στοιχείων ωπλισμένου σκυροδέματος με προβλήματα διάτμησης. [Thesis]. Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ); 2020. Available from: http://hdl.handle.net/10442/hedi/48692

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

25. Nguyen, Thanh Hai. Contribution à l'étude du comportement thermomécanique à très haute température des matériaux composites pour la réparation et/ou le renforcement des structures de Génie Civil : Contribution to the study of thermo-mechanical behavior at very high temperature of composite materials for the reparation and/or the reinforcement of civil engineering structures.

Degree: Docteur es, Génie civil, 2015, Université Claude Bernard – Lyon I

URL: http://www.theses.fr/2015LYO10244

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Dans le domaine du renforcement et/ou de la réparation des structures en béton armé par des matériaux composites à l'aide de la méthode du collage… (more)

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Dans le domaine du renforcement et/ou de la réparation des structures en béton armé par des matériaux composites à l'aide de la méthode du collage extérieur au moyen d'un adhésif époxy, une des préoccupations de la communauté scientifique est l'intégrité structurelle de ce système dans le cas d'incendie dans lequel la haute température est une caractéristique essentielle et peut atteindre jusqu'à 1200°C. Ce travail de recherche est axé sur le comportement thermomécanique à très haute température des matériaux composites [un composite à base de polymère carbone/ époxy (Carbon Fiber Reinforced Polymer- CFRP), un composite textile/ mortier cimentaire (Textile Reinforced Concrete- TRC) et un adhésif à base d'époxy]. L'évolution des propriétés mécaniques et d'autres aspects mécaniques de ces matériaux composites avec la température a été caractérisée. Une nouvelle procédure expérimentale concernant la mesure de la déformation de l'éprouvette à l'aide du capteur laser est développée et validée. Une étude numérique et expérimentale a été réalisée dans le but de déterminer principalement la température à la rupture des joints « composite/ adhésif/ composite » sous les sollicitations mécaniques et thermiques. L'efficacité de la protection thermique de deux isolants [PROMASPRAY®T (produit commercial de la société PROMAT] et Isolant A (produit développé par le LGCIE site Tusset) a aussi été étudiée dans cette thèse. Enfin, une approche numérique, à l'aide du logiciel ANSYS, est utilisée afin de déterminer, de façon préliminaire et approximative, à l'échelle matériau, les propriétés thermiques des matériaux (composite textile/ mortier cimentaire -TRC et Isolant A)

In the area of the strengthening and/or the reparation of reinforced concrete structures with composites by means of the external bonding method using an epoxy adhesive, one of the preoccupation of the scientific community is the structural integrity of this system in the event of fire in which the high temperature is the essential feature et can reach up to 1200°C. This research focuses on the thermo-mechanical behavior of composite materials [carbon/epoxy adhesive composite (or carbon fiber reinforced polymer (CFRP), textile/cementitious mortar composite (or textile reinforced concrete (TRC)] and an epoxy-based adhesive. The evolution of mechanical properties and other mechanical aspects of these materials with the temperature has been characterized. A new experimental procedure concerning the measurement of sample strain by the laser sensor is developed and validated. An experimental and numerical study has been realized in order to mainly determine the temperature at the failure of "composite/adhesive/composite" joints under thermal and mechanical loadings. The effectiveness of the thermal protection of two insulators [PROMASPRAY®T (a commercial product of the PROMAT company and the insulator A (product developed by the LGCIE site Tuset)] has also been investigated in this PhD thesis. Finally, a numerical approach, using ANSYS software, is used to determine, in…

Advisors/Committee Members: Ferrier, Emmanuel (thesis director), Si Larbi, Amir (thesis director), Vu, Xuan Hong (thesis director).

Subjects/Keywords: Comportement thermomécanique; Haute température; Composite carbone/ époxy (Carbon Fiber Reinforced Polymer - CFRP); Composite textile/mortier cimentaire (Textile Reinforced Concrete - TRC); Adhésif structural; Isolant thermique; Thermo-mechanical behavior; High temperature; Carbon/epoxy composite (Carbon Fiber Reinforced Polymer-CFRP); Textile/cementitious mortar composite (Textile Reinforced Concrete - TRC); Structural adhesive; Thermal insulator; 624

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nguyen, T. H. (2015). Contribution à l'étude du comportement thermomécanique à très haute température des matériaux composites pour la réparation et/ou le renforcement des structures de Génie Civil : Contribution to the study of thermo-mechanical behavior at very high temperature of composite materials for the reparation and/or the reinforcement of civil engineering structures. (Doctoral Dissertation). Université Claude Bernard – Lyon I. Retrieved from http://www.theses.fr/2015LYO10244

Chicago Manual of Style (16^th Edition):

Nguyen, Thanh Hai. “Contribution à l'étude du comportement thermomécanique à très haute température des matériaux composites pour la réparation et/ou le renforcement des structures de Génie Civil : Contribution to the study of thermo-mechanical behavior at very high temperature of composite materials for the reparation and/or the reinforcement of civil engineering structures.” 2015. Doctoral Dissertation, Université Claude Bernard – Lyon I. Accessed March 07, 2021. http://www.theses.fr/2015LYO10244.

MLA Handbook (7^th Edition):

Nguyen, Thanh Hai. “Contribution à l'étude du comportement thermomécanique à très haute température des matériaux composites pour la réparation et/ou le renforcement des structures de Génie Civil : Contribution to the study of thermo-mechanical behavior at very high temperature of composite materials for the reparation and/or the reinforcement of civil engineering structures.” 2015. Web. 07 Mar 2021.

Vancouver:

Nguyen TH. Contribution à l'étude du comportement thermomécanique à très haute température des matériaux composites pour la réparation et/ou le renforcement des structures de Génie Civil : Contribution to the study of thermo-mechanical behavior at very high temperature of composite materials for the reparation and/or the reinforcement of civil engineering structures. [Internet] [Doctoral dissertation]. Université Claude Bernard – Lyon I; 2015. [cited 2021 Mar 07]. Available from: http://www.theses.fr/2015LYO10244.

Council of Science Editors:

Nguyen TH. Contribution à l'étude du comportement thermomécanique à très haute température des matériaux composites pour la réparation et/ou le renforcement des structures de Génie Civil : Contribution to the study of thermo-mechanical behavior at very high temperature of composite materials for the reparation and/or the reinforcement of civil engineering structures. [Doctoral Dissertation]. Université Claude Bernard – Lyon I; 2015. Available from: http://www.theses.fr/2015LYO10244

Oregon State University

26. Daniels, Mitchell Alan. Experimental Classification of Intralaminar Matrix Compression Damage Propagation in Carbon Fiber Reinforced Polymers.

Degree: MS, Mechanical Engineering, 2016, Oregon State University

URL: http://hdl.handle.net/1957/59891

► Composites often are able to carry more load after damage due to the structure of laminates. In addition, damage can be difficult to detect in… (more)

▼ Composites often are able to carry more load after damage due to the structure of laminates. In addition, damage can be difficult to detect in composites compared to homogeneous materials. Understanding the behavior of composite material after damage is vital for composite structural design. Currently, experimental methods exist for classifying fiber tension, fiber compression, and matrix tensile damage propagation. However, little has been done on matrix compression propagation. First, several candidate specimens were identified based on fiber compression studies. These specimens were modeled using FEA and the base continuum damage mechanics models. The size of the matrix compressive damage region was compared to select the specimens. Compact compression and center notch compression specimens showed good isolation of compressive damage. Compact compression specimens were chosen, as they were less dependent on the boundary conditions to achieve the desired damage mechanisms. These specimens were then manufactured and tested along with uniform compression specimens. Shear cracks propagating through the thickness of the material were the primary failure mechanism observed, with other damage mechanisms occurring after some propagation. A contour J-integral was used to measure the strain energy release rate from DIC displacement field data. The plastic behavior of the material was classified to determine the applicability of the J-integral. It was determined that the J-integral is potentially valid for compressive damage initiation. Typical values showed a range of energy dissipation values when damage initiation between 30 kJ/m² and 40 kJ/m². These values were reflected in the areas under the uniform compression specimen stress-displacement curves for similar fracture angles. These specimens also showed correlation between energy dissipation and fracture plane angle. This is due to a greater contribution of mode I compression at lower angles. Residual stresses were observed in the past damage material due to friction, fiber bridging and crack locking. These results show the limitations of the base continuum damage mechanics models and associated assumptions. Advisors/Committee Members: Parmigiani, John P. (advisor), Bay, Brain (committee member).

Subjects/Keywords: Composites; Carbon fiber-reinforced plastics – Compression testing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Daniels, M. A. (2016). Experimental Classification of Intralaminar Matrix Compression Damage Propagation in Carbon Fiber Reinforced Polymers. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59891

Chicago Manual of Style (16^th Edition):

Daniels, Mitchell Alan. “Experimental Classification of Intralaminar Matrix Compression Damage Propagation in Carbon Fiber Reinforced Polymers.” 2016. Masters Thesis, Oregon State University. Accessed March 07, 2021. http://hdl.handle.net/1957/59891.

MLA Handbook (7^th Edition):

Daniels, Mitchell Alan. “Experimental Classification of Intralaminar Matrix Compression Damage Propagation in Carbon Fiber Reinforced Polymers.” 2016. Web. 07 Mar 2021.

Vancouver:

Daniels MA. Experimental Classification of Intralaminar Matrix Compression Damage Propagation in Carbon Fiber Reinforced Polymers. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1957/59891.

Council of Science Editors:

Daniels MA. Experimental Classification of Intralaminar Matrix Compression Damage Propagation in Carbon Fiber Reinforced Polymers. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59891

Oregon State University

27. Koski, William C. Design, analysis, and validation of composite c-channel beams.

Degree: MS, Mechanical Engineering, 2012, Oregon State University

URL: http://hdl.handle.net/1957/34292

► A lightweight carbon fiber reinforced polymer (CFRP) c-channel beam was previously designed using analytical theory and finite element analysis and subsequently manufactured through a pultrusion… (more)

Subjects/Keywords: Composites; Carbon fiber-reinforced plastics – Testing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Koski, W. C. (2012). Design, analysis, and validation of composite c-channel beams. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/34292

Chicago Manual of Style (16^th Edition):

Koski, William C. “Design, analysis, and validation of composite c-channel beams.” 2012. Masters Thesis, Oregon State University. Accessed March 07, 2021. http://hdl.handle.net/1957/34292.

MLA Handbook (7^th Edition):

Koski, William C. “Design, analysis, and validation of composite c-channel beams.” 2012. Web. 07 Mar 2021.

Vancouver:

Koski WC. Design, analysis, and validation of composite c-channel beams. [Internet] [Masters thesis]. Oregon State University; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1957/34292.

Council of Science Editors:

Koski WC. Design, analysis, and validation of composite c-channel beams. [Masters Thesis]. Oregon State University; 2012. Available from: http://hdl.handle.net/1957/34292

28. Brunell, Garrett Floyd. Functionality of a Damaged Steel Truss Bridge Strengthened with Post-Tensioned CFRP Tendons.

Degree: 2012, North Dakota State University

URL: http://hdl.handle.net/10365/26559

► This research program investigates the performance of a steel truss bridge when subjected to both localized web damage and a subsequent post-tensioned strengthening approach. The… (more)

Subjects/Keywords: Static tests.; Carbon fiber-reinforced plastics.; Trusses.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Brunell, G. F. (2012). Functionality of a Damaged Steel Truss Bridge Strengthened with Post-Tensioned CFRP Tendons. (Thesis). North Dakota State University. Retrieved from http://hdl.handle.net/10365/26559

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Brunell, Garrett Floyd. “Functionality of a Damaged Steel Truss Bridge Strengthened with Post-Tensioned CFRP Tendons.” 2012. Thesis, North Dakota State University. Accessed March 07, 2021. http://hdl.handle.net/10365/26559.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Brunell, Garrett Floyd. “Functionality of a Damaged Steel Truss Bridge Strengthened with Post-Tensioned CFRP Tendons.” 2012. Web. 07 Mar 2021.

Vancouver:

Brunell GF. Functionality of a Damaged Steel Truss Bridge Strengthened with Post-Tensioned CFRP Tendons. [Internet] [Thesis]. North Dakota State University; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10365/26559.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Brunell GF. Functionality of a Damaged Steel Truss Bridge Strengthened with Post-Tensioned CFRP Tendons. [Thesis]. North Dakota State University; 2012. Available from: http://hdl.handle.net/10365/26559

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New Mexico

29. Soliman, Eslam. New generation fiber reinforced polymer composites incorporating carbon nanotubes.

Degree: Civil Engineering, 2012, University of New Mexico

URL: http://hdl.handle.net/1928/17505

► The last five decades observed an increasing use of fiber reinforced polymer(FRP) composites as alternative construction materials for aerospace and infrastructure. The high specific strength… (more)

Subjects/Keywords: Carbon fiber-reinforced plastics; Nanotubes; Nanocomposites (Materials)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Soliman, E. (2012). New generation fiber reinforced polymer composites incorporating carbon nanotubes. (Doctoral Dissertation). University of New Mexico. Retrieved from http://hdl.handle.net/1928/17505

Chicago Manual of Style (16^th Edition):

Soliman, Eslam. “New generation fiber reinforced polymer composites incorporating carbon nanotubes.” 2012. Doctoral Dissertation, University of New Mexico. Accessed March 07, 2021. http://hdl.handle.net/1928/17505.

MLA Handbook (7^th Edition):

Soliman, Eslam. “New generation fiber reinforced polymer composites incorporating carbon nanotubes.” 2012. Web. 07 Mar 2021.

Vancouver:

Soliman E. New generation fiber reinforced polymer composites incorporating carbon nanotubes. [Internet] [Doctoral dissertation]. University of New Mexico; 2012. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/1928/17505.

Council of Science Editors:

Soliman E. New generation fiber reinforced polymer composites incorporating carbon nanotubes. [Doctoral Dissertation]. University of New Mexico; 2012. Available from: http://hdl.handle.net/1928/17505

Durban University of Technology

30. Chetty, Sathievelli. The structural integrity of nanoclay filled epoxy polymer under cyclic loading.

Degree: 2017, Durban University of Technology

URL: http://hdl.handle.net/10321/2469

►

Submitted in fulfillment of the requirements of the Degree of M.Tech.: Mechanical Engineering, Durban University of Technology, 2017.

Fatigue crack initiation and propagation behaviour of… (more)

▼

Submitted in fulfillment of the requirements of the Degree of M.Tech.: Mechanical Engineering, Durban University of Technology, 2017.

Fatigue crack initiation and propagation behaviour of CFRP have been of great importance because such composites are often used in engineering components that are subjected to continuous cyclic loading. The objective of this thesis work was to investigate the damage characteristics of the fatigue properties of CFRP composites by the modification of the polymer matrix with nanoclay addition. Carbon fibre reinforced epoxy was produced via vacuum assisted resin infusion moulding method (VARIM) with nanoclay concentrations of 0wt%, 1wt%, 3wt% and 5wt%. Tension-tension fatigue tests were conducted at loading levels of 90%, 75% and 60%. The frequency that was used was 3Hz with R value of 0.1. The results showed that at nanoclay percentages of 0wt%, 1wt% and 3wt% there was a consistent trend, where the number of cycles increased in fatigue loading percentages of 90%, 75% and 60%. At 5wt% nanoclay percentage the number of fatigue cycles dropped significantly at the 90% fatigue loading. The brittle nature of the 5wt% laminate became dominate and the sample fractured early at low fatigue cycle numbers. At the 75% fatigue loading, the number of cycles increased and at 60% fatigue loading the 5wt% nanoclay sample exceeded the number of cycles of all the nanoclay percentages by 194%. This was due to the intercalated arrangement of the nanoclays favouring the slow rate of surface temperature increase, during fatigue testing, at low fatigue cycle loading. The Crack Density analysis was performed and showed that at the same time in the fatigue cycle life, the 1wt% had 55 cracks, 3wt% had 52 cracks and the 5wt% had 50 cracks, for the 60% fatigue loading. This proved that it took longer for the cracks to initiate and propagate through the sample as the nanoclay percentage increased. Impact and hardness testing showed that the 5wt% exhibited brittle behaviour, which contributed to the results above. Scanning electron microscopy examination highlighted that the agglomeration of nanoclays delayed the crack initiation and propagation through the specimen and that the extent of fatigue damage decreased as the nanoclay percentage increased. A fatigue failure matrix was developed and showed that delamination, fibre breakage and matrix failure were the predominate causes for the fatigue failure.

M

Advisors/Committee Members: Kanny, Krishnan, Mohan, T.P..

Subjects/Keywords: Polymeric composites; Epoxy resins; Carbon fiber-reinforced plastics – Fatigue; Carbon fiber-reinforced plastics – Cracking

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chetty, S. (2017). The structural integrity of nanoclay filled epoxy polymer under cyclic loading. (Thesis). Durban University of Technology. Retrieved from http://hdl.handle.net/10321/2469

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chetty, Sathievelli. “The structural integrity of nanoclay filled epoxy polymer under cyclic loading.” 2017. Thesis, Durban University of Technology. Accessed March 07, 2021. http://hdl.handle.net/10321/2469.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chetty, Sathievelli. “The structural integrity of nanoclay filled epoxy polymer under cyclic loading.” 2017. Web. 07 Mar 2021.

Vancouver:

Chetty S. The structural integrity of nanoclay filled epoxy polymer under cyclic loading. [Internet] [Thesis]. Durban University of Technology; 2017. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/10321/2469.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chetty S. The structural integrity of nanoclay filled epoxy polymer under cyclic loading. [Thesis]. Durban University of Technology; 2017. Available from: http://hdl.handle.net/10321/2469

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations