subject:(Structures AND Materials)

University of Ottawa

1. Hayles, Meika. Investigation Into the Mechanical Properties and Structural Behaviour of Recycled Concrete Members .

Degree: 2018, University of Ottawa

► Recycled concrete aggregates (RCA) are an eco-sustainable alternative to traditional aggregates. The equivalent mortar volume method has been developed to design RCA concrete with comparable… (more)

Subjects/Keywords: Concrete; Sustainability; Materials; Cement; Structures

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APA (6^th Edition):

Hayles, M. (2018). Investigation Into the Mechanical Properties and Structural Behaviour of Recycled Concrete Members . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/37801

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):

Hayles, Meika. “Investigation Into the Mechanical Properties and Structural Behaviour of Recycled Concrete Members .” 2018. Thesis, University of Ottawa. Accessed March 01, 2021. http://hdl.handle.net/10393/37801.

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

MLA Handbook (7^th Edition):

Hayles, Meika. “Investigation Into the Mechanical Properties and Structural Behaviour of Recycled Concrete Members .” 2018. Web. 01 Mar 2021.

Vancouver:

Hayles M. Investigation Into the Mechanical Properties and Structural Behaviour of Recycled Concrete Members . [Internet] [Thesis]. University of Ottawa; 2018. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10393/37801.

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

Council of Science Editors:

Hayles M. Investigation Into the Mechanical Properties and Structural Behaviour of Recycled Concrete Members . [Thesis]. University of Ottawa; 2018. Available from: http://hdl.handle.net/10393/37801

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

Embry-Riddle Aeronautical University

2. Waelchli, Robert. A Novel Magnetorheological Fluid Damper for a Small Spacecraft with Flexible Appendages.

Degree: MSin Mechanical Engineering, Mechanical Engineering, 2018, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/edt/391

► Small satellites have become increasingly popular over the past thirty years, particularly since the adoption of the common CubeSat architecture early this century. Because… (more)

Subjects/Keywords: Space Vehicles; Structures and Materials

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APA (6^th Edition):

Waelchli, R. (2018). A Novel Magnetorheological Fluid Damper for a Small Spacecraft with Flexible Appendages. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/edt/391

Chicago Manual of Style (16^th Edition):

Waelchli, Robert. “A Novel Magnetorheological Fluid Damper for a Small Spacecraft with Flexible Appendages.” 2018. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 01, 2021. https://commons.erau.edu/edt/391.

MLA Handbook (7^th Edition):

Waelchli, Robert. “A Novel Magnetorheological Fluid Damper for a Small Spacecraft with Flexible Appendages.” 2018. Web. 01 Mar 2021.

Vancouver:

Waelchli R. A Novel Magnetorheological Fluid Damper for a Small Spacecraft with Flexible Appendages. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2018. [cited 2021 Mar 01]. Available from: https://commons.erau.edu/edt/391.

Council of Science Editors:

Waelchli R. A Novel Magnetorheological Fluid Damper for a Small Spacecraft with Flexible Appendages. [Masters Thesis]. Embry-Riddle Aeronautical University; 2018. Available from: https://commons.erau.edu/edt/391

3. St-Pierre, Luc. The quasi-static and dynamic responses of metallic sandwich structures.

Degree: PhD, 2012, University of Cambridge

URL: http://www.dspace.cam.ac.uk/handle/1810/243443https://www.repository.cam.ac.uk/bitstream/1810/243443/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/5/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/3/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/6/ls451_thesis_revised.pdf.jpg

► Lattice materials are used as the core of sandwich panels to construct light and strong structures. This thesis focuses on metallic sandwich structures and has… (more)

▼ Lattice materials are used as the core of sandwich panels to construct light and strong structures. This thesis focuses on metallic sandwich structures and has two main objectives: (i) explore how a surface treatment can improve the strength of a lattice material and (ii) investigate the collapse response of two competing prismatic sandwich cores employed in ship hulls. First, the finite element method is used to examine the effect of carburisation and strain hardening upon the compressive response of a pyramidal lattice made from hollow tubes or solid struts. The carburisation surface treatment increases the yield strength of the material, but its effects on pyramidal lattices are not known. Here, it is demonstrated that carburisation increases the plastic buckling strength of the lattice and reduces the slenderness ratio at which the transition from plastic to elastic buckling occurs. The predictions also showed that strain hardening increases the compressive strength of stocky lattices with a slenderness ratio inferior to ten, but without affecting the collapse mode of the lattice. Second, the quasi-static three-point bending responses of simply supported and clamped sandwich beams with a corrugated core or a Y-frame core are compared via experiments and finite element simulations. The role of the face-sheets is assessed by considering beams with (i) front-and-back faces present and (ii) front face present, but back face absent. These two beam designs are used to represent single hull and double hull ship structures, and they are compared on an equal mass basis by doubling the thickness of the front face when the back face is absent. Beams with a corrugated core are found to be slightly stronger than those with a Y-frame core, and two collapse mechanisms are identified depending upon beam span. Short beams collapse by indentation and for this collapse mechanism, beams without a back face outperform those with front-and back faces present. In contrast, long beams fail by Brazier plastic buckling and for this collapse mechanism, the presence of a back face strengthens the beam. Third, drop weight tests with an impact velocity of 5 m/s are performed on simply supported and clamped sandwich beams with a corrugated core or a Y-frame core. These tests are conducted to mimic the response of a sandwich hull in a ship collision. The responses measured at 5 m/s are found to be slightly stronger than those measured quasi-statically. The measurements are in reasonable agreement with finite element predictions. In addition, the finite element method is used to investigate whether the collapse mechanism at 5 m/s is different from the one obtained quasi-statically. The predictions indicate that sandwich beams that collapse quasi-statically by indentation also fail by indentation at 5 m/s. In contrast, the simulations for beams that fail quasi-statically by Brazier plastic buckling show that they collapse by indentation at 5 m/s. Finally, the dynamic indentation response of sandwich panels with a corrugated core or a Y-frame core…

Subjects/Keywords: Sandwich structures; Lattice materials

10 more images…

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

APA (6^th Edition):

St-Pierre, L. (2012). The quasi-static and dynamic responses of metallic sandwich structures. (Doctoral Dissertation). University of Cambridge. Retrieved from http://www.dspace.cam.ac.uk/handle/1810/243443https://www.repository.cam.ac.uk/bitstream/1810/243443/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/5/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/3/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/6/ls451_thesis_revised.pdf.jpg

Chicago Manual of Style (16^th Edition):

St-Pierre, Luc. “The quasi-static and dynamic responses of metallic sandwich structures.” 2012. Doctoral Dissertation, University of Cambridge. Accessed March 01, 2021. http://www.dspace.cam.ac.uk/handle/1810/243443https://www.repository.cam.ac.uk/bitstream/1810/243443/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/5/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/3/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/6/ls451_thesis_revised.pdf.jpg.

MLA Handbook (7^th Edition):

St-Pierre, Luc. “The quasi-static and dynamic responses of metallic sandwich structures.” 2012. Web. 01 Mar 2021.

Vancouver:

St-Pierre L. The quasi-static and dynamic responses of metallic sandwich structures. [Internet] [Doctoral dissertation]. University of Cambridge; 2012. [cited 2021 Mar 01]. Available from: http://www.dspace.cam.ac.uk/handle/1810/243443https://www.repository.cam.ac.uk/bitstream/1810/243443/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/5/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/3/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/6/ls451_thesis_revised.pdf.jpg.

Council of Science Editors:

St-Pierre L. The quasi-static and dynamic responses of metallic sandwich structures. [Doctoral Dissertation]. University of Cambridge; 2012. Available from: http://www.dspace.cam.ac.uk/handle/1810/243443https://www.repository.cam.ac.uk/bitstream/1810/243443/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/5/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/3/ls451_thesis_revised.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/243443/6/ls451_thesis_revised.pdf.jpg

University of Cambridge

4. St-Pierre, Luc. The quasi-static and dynamic responses of metallic sandwich structures.

Degree: PhD, 2012, University of Cambridge

URL: https://doi.org/10.17863/CAM.14021 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553217

► Lattice materials are used as the core of sandwich panels to construct light and strong structures. This thesis focuses on metallic sandwich structures and has… (more)

▼ Lattice materials are used as the core of sandwich panels to construct light and strong structures. This thesis focuses on metallic sandwich structures and has two main objectives: (i) explore how a surface treatment can improve the strength of a lattice material and (ii) investigate the collapse response of two competing prismatic sandwich cores employed in ship hulls. First, the finite element method is used to examine the effect of carburisation and strain hardening upon the compressive response of a pyramidal lattice made from hollow tubes or solid struts. The carburisation surface treatment increases the yield strength of the material, but its effects on pyramidal lattices are not known. Here, it is demonstrated that carburisation increases the plastic buckling strength of the lattice and reduces the slenderness ratio at which the transition from plastic to elastic buckling occurs. The predictions also showed that strain hardening increases the compressive strength of stocky lattices with a slenderness ratio inferior to ten, but without affecting the collapse mode of the lattice. Second, the quasi-static three-point bending responses of simply supported and clamped sandwich beams with a corrugated core or a Y-frame core are compared via experiments and finite element simulations. The role of the face-sheets is assessed by considering beams with (i) front-and-back faces present and (ii) front face present, but back face absent. These two beam designs are used to represent single hull and double hull ship structures, and they are compared on an equal mass basis by doubling the thickness of the front face when the back face is absent. Beams with a corrugated core are found to be slightly stronger than those with a Y-frame core, and two collapse mechanisms are identified depending upon beam span. Short beams collapse by indentation and for this collapse mechanism, beams without a back face outperform those with front-and back faces present. In contrast, longbeams fail by Brazier plastic buckling and for this collapse mechanism, the presence of a back face strengthens the beam. Third, drop weight tests with an impact velocity of 5 m/s are performed on simply supported and clamped sandwich beams with a corrugated core or a Y-frame core. These tests are conducted to mimic the response of a sandwich hull in a ship collision. The responses measured at 5 m/s are found to be slightly stronger than those measured quasi-statically. The measurements are in reasonable agreement with finite element predictions. In addition, the finite element method is used to investigate whether the collapse mechanism at 5 m/s is different from the one obtained quasi-statically. The predictions indicate that sandwich beams that collapse quasi-statically by indentation also fail by indentation at 5 m/s. In contrast, the simulations for beams that fail quasi-statically by Brazier plastic buckling show that they collapse by indentation at 5 m/s. Finally, the dynamic indentation response of sandwich panels with a corrugated core or a Y-frame core…

Subjects/Keywords: 620; Sandwich structures; Lattice materials

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

APA (6^th Edition):

St-Pierre, L. (2012). The quasi-static and dynamic responses of metallic sandwich structures. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.14021 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553217

Chicago Manual of Style (16^th Edition):

St-Pierre, Luc. “The quasi-static and dynamic responses of metallic sandwich structures.” 2012. Doctoral Dissertation, University of Cambridge. Accessed March 01, 2021. https://doi.org/10.17863/CAM.14021 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553217.

MLA Handbook (7^th Edition):

St-Pierre, Luc. “The quasi-static and dynamic responses of metallic sandwich structures.” 2012. Web. 01 Mar 2021.

Vancouver:

St-Pierre L. The quasi-static and dynamic responses of metallic sandwich structures. [Internet] [Doctoral dissertation]. University of Cambridge; 2012. [cited 2021 Mar 01]. Available from: https://doi.org/10.17863/CAM.14021 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553217.

Council of Science Editors:

St-Pierre L. The quasi-static and dynamic responses of metallic sandwich structures. [Doctoral Dissertation]. University of Cambridge; 2012. Available from: https://doi.org/10.17863/CAM.14021 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553217

University of Oklahoma

5. Drury, Jonathan. Shear Performance of Non-Traditional Concrete.

Degree: PhD, 2018, University of Oklahoma

URL: http://hdl.handle.net/11244/301339

► Concrete is the second most consumed material in the world, second only to water. Concrete has been around in different forms for centuries, and science… (more)

▼ Concrete is the second most consumed material in the world, second only to water. Concrete has been around in different forms for centuries, and science and technology continually push the previously believed limits. Two such types of concrete are self-consolidating concrete (SCC) and cement-limiting concrete. While each is vastly different from the other, they present similar problems to designers and engineers. Practitioners have implemented new technologies such as fiber reinforcement to combat issues with these concretes, but the overall behavior and internal mechanism of these concretes are not thoroughly understood. This study investigated the shear behavior of seven different concrete types: conventional concrete with micro-fibers, conventional concrete with micro-fibers and macro-fibers, cement-limiting concrete, cement-limiting concrete with micro-fibers, cement-limiting concrete with micro-fibers and macro-fibers, SCC, SCC with macro-fibers, and compared their behavior to the behavior of conventional concrete. Additionally, a newly proposed push-off test method was developed, investigated, and compared to historic methods. The experimental programs consisted of 15 full-scale shear beams without shear reinforcement in the test regions (3 with conventional concrete, 6 with cement-limiting concrete, and 6 with SCC), 24 push-off specimens (3 for each of the eight concrete mixtures investigated), and many small-scale specimens to capture the fresh and hardened properties of the concrete mixtures. The shear beams were tested under a simply supported four-point loading condition. Results of this study showed that fiber reinforced concrete has more variable performance, but that fiber reinforcement can mitigate the negative performance aspects of SCC and cement-limiting concrete. It was shown that micro-fibers amplified the cohesion performance of existing concrete matrixes, but that macro-fiber tend to govern the performance of a concrete mixture. It was shown than that the optimized gradation of the cement-limiting concrete provided the highest aggregate interlock, but that aggregate interlock is not the best predictor of shear transfer performance between two concrete surfaces. Lastly, this study showed that the proposed push-off test is not only an acceptable method for analyzing aggregate interlock, but it is an improvement due to the ability to obtain more data from it, improved quality control, simplified analysis, and repeatability of the outcomes. Advisors/Committee Members: Volz, Jeffery (advisor), Floyd, Royce (committee member), Harvey, P. Scott (committee member), Ramseyer, Christopher (committee member), Shadravan, Shideh (committee member).

Subjects/Keywords: Civil Engineering Materials Structures

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

APA (6^th Edition):

Drury, J. (2018). Shear Performance of Non-Traditional Concrete. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/301339

Chicago Manual of Style (16^th Edition):

Drury, Jonathan. “Shear Performance of Non-Traditional Concrete.” 2018. Doctoral Dissertation, University of Oklahoma. Accessed March 01, 2021. http://hdl.handle.net/11244/301339.

MLA Handbook (7^th Edition):

Drury, Jonathan. “Shear Performance of Non-Traditional Concrete.” 2018. Web. 01 Mar 2021.

Vancouver:

Drury J. Shear Performance of Non-Traditional Concrete. [Internet] [Doctoral dissertation]. University of Oklahoma; 2018. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/11244/301339.

Council of Science Editors:

Drury J. Shear Performance of Non-Traditional Concrete. [Doctoral Dissertation]. University of Oklahoma; 2018. Available from: http://hdl.handle.net/11244/301339

Michigan Technological University

6. Shen, Michael. MILITARY ASSAULT BRIDGING STRUCTURAL ANALYSIS AND LOAD TESTING.

Degree: PhD, Department of Mechanical Engineering-Engineering Mechanics, 2017, Michigan Technological University

URL: https://digitalcommons.mtu.edu/etdr/465

► Armored Vehicle Launched Bridge (AVLB) has been analyzed on its load carrying capacity and stability of bracing with theoretical computation, FEA simulation and full-size… (more)

Subjects/Keywords: structures; Aerospace Engineering; Automotive Engineering; Structures and Materials

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

APA (6^th Edition):

Shen, M. (2017). MILITARY ASSAULT BRIDGING STRUCTURAL ANALYSIS AND LOAD TESTING. (Doctoral Dissertation). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etdr/465

Chicago Manual of Style (16^th Edition):

Shen, Michael. “MILITARY ASSAULT BRIDGING STRUCTURAL ANALYSIS AND LOAD TESTING.” 2017. Doctoral Dissertation, Michigan Technological University. Accessed March 01, 2021. https://digitalcommons.mtu.edu/etdr/465.

MLA Handbook (7^th Edition):

Shen, Michael. “MILITARY ASSAULT BRIDGING STRUCTURAL ANALYSIS AND LOAD TESTING.” 2017. Web. 01 Mar 2021.

Vancouver:

Shen M. MILITARY ASSAULT BRIDGING STRUCTURAL ANALYSIS AND LOAD TESTING. [Internet] [Doctoral dissertation]. Michigan Technological University; 2017. [cited 2021 Mar 01]. Available from: https://digitalcommons.mtu.edu/etdr/465.

Council of Science Editors:

Shen M. MILITARY ASSAULT BRIDGING STRUCTURAL ANALYSIS AND LOAD TESTING. [Doctoral Dissertation]. Michigan Technological University; 2017. Available from: https://digitalcommons.mtu.edu/etdr/465

University of Illinois – Urbana-Champaign

7. Choi, Jonghyun. Assembly and integration of two-dimensional nanomaterials for advanced interfaces and sensors.

Degree: PhD, Mechanical Engineering, 2018, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/101352

► Nanomaterials have been extensively investigated by the research community owing to their extraordinary properties and functionalities that significantly surpass their bulk counterparts. Among a variety… (more)

▼ Nanomaterials have been extensively investigated by the research community owing to their extraordinary properties and functionalities that significantly surpass their bulk counterparts. Among a variety of nanomaterials, two dimensional (2D) nanomaterials, represented by graphene and transition metal dichalcogenides (TMDCs), have captivated academic and industrial attentions because of their promise in future electronics, surface coating, biosensing, as well as the compatibility with the scalable and low-cost, top-down fabrication process. In this dissertation, I further explore the potentiality of 2D materials as an advanced surface and field-effect transistor (FET)-based biochemical sensing platform, and investigate electrical double layer (EDL) formation on 2D materials. First, I present various three-dimensional (3D) integration techniques of 2D materials that exhibit promise as a biosensing platform, tunable wetting surface, and stretchable electronic device. I demonstrate that 2D materials could be integrated with 3D microstructure substrates with a novel and simple substrate engineering technique that utilizes solvent-induced swelling of substrates. In addition, I report on developing flower-like structures (i.e., nanoflowers) of molybdenum disulfide (MoS2) grown by metal-organic chemical vapor deposition (MOCVD), and further demonstrate dual-scale hierarchical structures by introducing additional buckle-delamination induced microscale crumples using a shape-memory polymer. Moreover, I achieve bio-inspired hierarchical structures of graphene by combined use of 3D microstructure substrates and mechanically-driven nanoscale crumples of graphene, which exhibit a potential for a highly sensitive biochemical sensor platform. Second, I investigate graphene FETs for an advanced electrophysiological study, as well as for the understanding of EDL formation on atomically-thin materials. I demonstrate simultaneous electrical recording of controlled and stimulated behaviors of optogenetically encoded skeletal muscle cells and neurons. The recorded electrical signals corresponded well with the stimulation patterns of optogenetically encoded cells, demonstrating the successful real-time and simultaneous sensing of extracellular action potentials from target cells based on graphene FETs. Furthermore, I study how the EDL, which is an essential component for top solution-gated FETs and biosensors, is affected by the surface properties of underlying substrates beneath graphene. Hydrophobic substrates are demonstrated to disrupt the EDL formation on graphene, which is evidenced by transconductance measurements by FETs, capacitance measurements by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), as well as molecular dynamics (MD) simulations. This thesis represents significant advancements in assembly and integration of 2D materials for diverse novel applications as well as fundamental scientific research. Our results offer unique strategies toward superlative surface coatings, stretchable electronics,… Advisors/Committee Members: Nam, SungWoo (advisor), Nam, SungWoo (Committee Chair), Aluru, Narayana R (committee member), Li, Xiuling (committee member), Kim, Seok (committee member).

Subjects/Keywords: 2D materials; 3D structures; interfaces; sensors

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

APA (6^th Edition):

Choi, J. (2018). Assembly and integration of two-dimensional nanomaterials for advanced interfaces and sensors. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/101352

Chicago Manual of Style (16^th Edition):

Choi, Jonghyun. “Assembly and integration of two-dimensional nanomaterials for advanced interfaces and sensors.” 2018. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 01, 2021. http://hdl.handle.net/2142/101352.

MLA Handbook (7^th Edition):

Choi, Jonghyun. “Assembly and integration of two-dimensional nanomaterials for advanced interfaces and sensors.” 2018. Web. 01 Mar 2021.

Vancouver:

Choi J. Assembly and integration of two-dimensional nanomaterials for advanced interfaces and sensors. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2018. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2142/101352.

Council of Science Editors:

Choi J. Assembly and integration of two-dimensional nanomaterials for advanced interfaces and sensors. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2018. Available from: http://hdl.handle.net/2142/101352

Hong Kong University of Science and Technology

8. Yang, Meng. Bacterial behavior on honeycomb patterned surfaces.

Degree: 2013, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-62656 ; https://doi.org/10.14711/thesis-b1255095 ; http://repository.ust.hk/ir/bitstream/1783.1-62656/1/th_redirect.html

► The adhesion of bacteria to medical implants forming biofilms might lead to healthcare-associated infections. Initial bacterial adhesion is mediated by material surface properties. Therefore, control… (more)

▼ The adhesion of bacteria to medical implants forming biofilms might lead to healthcare-associated infections. Initial bacterial adhesion is mediated by material surface properties. Therefore, control of bacterial adhesion to material surfaces is important for reducing infection. Numerous researches have been devoted to the chemical and physical modification of biomaterial surfaces to control initial bacterial adhesion. However, the successful design of biomaterials for the treatment of infections remains a challenge. Surface topographic patterns of micro- or nano-scale have been effective to manipulate behavior of different types of cells. Previously, the bacterial behavior on the micro-pillar patterned surfaces has been studied in our group and confirmed that the micro-pillar pattern do have effects on the bacterial behavior. Now in this study we further fabricated a honeycomb pattern which provided a reduced continuous surface area compared with micro-pillar pattern. The honeycomb patterns on silicon substrate with characteristic dimensions varied from 0.5 μm to 10 μm were fabricated. Two typical bacteria with distinctive shapes (E.coli and S.aureus) were used as study models. After culturing the samples with bacteria, the effects of honeycomb patterns on the bacterial adhesion, growth, proliferation and viability were investigated. Experimental results show that the honeycomb topography with specific feature size around 1 μm can significantly reduce bacterial adhesion. Furthermore, the honeycomb patterns can inhibit bacterial growth and change the direction of growth when the bacterial is confined into a well. These influences may result from the physical confinement effect on bacteria. By comparing Sample_UP vs. Sample_DOWN, the adherent bacterial is much less on Sample_DOWN, but the trends of bacterial adhesion are the same and irrespective of the gravity of bacteria. In comparison with bacterial responses to pillar patterns, we found that topographic patterns with dimensions approaching to bacterial size can provide stronger physical confinement effect than others. However, the viability of the bacteria does not obviously influenced by the pillar and honeycomb topography within 24h. This study is expected to contribute to better understanding of topographic effects on bacterial behavior and healthcare-associated infections on biomaterials.

Subjects/Keywords: Bacteria ; Adhesion ; Biomedical materials ; Surfaces ; Honeycomb structures

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APA (6^th Edition):

Yang, M. (2013). Bacterial behavior on honeycomb patterned surfaces. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-62656 ; https://doi.org/10.14711/thesis-b1255095 ; http://repository.ust.hk/ir/bitstream/1783.1-62656/1/th_redirect.html

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):

Yang, Meng. “Bacterial behavior on honeycomb patterned surfaces.” 2013. Thesis, Hong Kong University of Science and Technology. Accessed March 01, 2021. http://repository.ust.hk/ir/Record/1783.1-62656 ; https://doi.org/10.14711/thesis-b1255095 ; http://repository.ust.hk/ir/bitstream/1783.1-62656/1/th_redirect.html.

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

MLA Handbook (7^th Edition):

Yang, Meng. “Bacterial behavior on honeycomb patterned surfaces.” 2013. Web. 01 Mar 2021.

Vancouver:

Yang M. Bacterial behavior on honeycomb patterned surfaces. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2013. [cited 2021 Mar 01]. Available from: http://repository.ust.hk/ir/Record/1783.1-62656 ; https://doi.org/10.14711/thesis-b1255095 ; http://repository.ust.hk/ir/bitstream/1783.1-62656/1/th_redirect.html.

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

Council of Science Editors:

Yang M. Bacterial behavior on honeycomb patterned surfaces. [Thesis]. Hong Kong University of Science and Technology; 2013. Available from: http://repository.ust.hk/ir/Record/1783.1-62656 ; https://doi.org/10.14711/thesis-b1255095 ; http://repository.ust.hk/ir/bitstream/1783.1-62656/1/th_redirect.html

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

Delft University of Technology

9. Wink, H.P. (author). Retrofitting of Existing Infrastructure Structures with Advanced Cementitious Materials (ACM's).

Degree: 2015, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:b9218b73-ccd5-4cbc-b9d7-326440817b3b

► Existing structures are built according to the valid codes at that time and reaching their design life time. The traffic loads and traffic intensity has… (more)

▼ Existing structures are built according to the valid codes at that time and reaching their design life time. The traffic loads and traffic intensity has also increased. In addition, the existing reinforced concrete structures are exposed to degradation mechanisms, like chlorides and carbonation during their lifetime. Existing concrete road infrastructure can have the need to restore the structural performance or the durability. Advanced Ce-mentitious Materials (ACM’s) has the potential for retrofitting due to the increased strength properties and durability. High Performance Concrete (HPC) and especially Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) have increased strength properties and a dense matrix, which prevents the ingress of detrimental substances. Strain Hardening Cementitious Composites (SHCC) has a high tensile strain capacity, whereby the crack widths are limited. The strengthening effect of SHCC retrofitting is negligible. The biggest potential for retrofitting of existing infrastructure with ACM’s is in retrofitting of durability problems. The structural shear strength problems are less severe than originally thought and traditional structural retrofit solutions like FRP lamellas and external prestressing seems to be more feasible and more economic solutions compared to an ACM layer retrofit system. On the other hand, the reinforcement corrosion of concrete structures is expected to increase. Moreover, HPC and UHPFRC both have a dense matrix to prevent the ingress of detrimental substances. SHCC exhibits a large tensile strain capacity and limited crack widths. A specific durability ACM retrofit solution is used in a numerical model (see Figure 1). The durability retrofitting is based on a cast in situ ACM layer on a vertical existing surface, where the time-dependent development of the ACM properties and the interface between the ACM layer and old concrete determine the structural behav-iour. The mechanical properties develop due to the on-going hydration. Shrinkage is the cause of the main stresses in the model and the stresses are partly relaxed by the tensile creep behaviour of the ACM layer. The basic failure modes are debonding of the ACM layer at the free ends and transverse cracking in the ACM layer. A vertical existing surface is used, because vertical surfaces of road infrastructure structures can exhibit dura-bility problems due to de-icing salts in splash water and also tidal zones of marine structures. A parameter study is performed to enhance the understanding of the structural behaviour due to the time-dependent behaviour of the new ACM layer. A thicker ACM layer causes more debonding and transverse crack-ing behaviour, because the total shrinkage displacement is higher which causes higher stresses. A larger shrink-age strain causes higher stresses and more cracking. The creep in the ACM layer causes a stress relaxation. Increased creep compliance results in less severe cracking. The influence of the thickness of the old concrete structure and the length of the ACM… Advisors/Committee Members: Hordijk, D.A. (mentor), Reitsema, A.D. (mentor), Savija, B. (mentor), Grünewald, S. (mentor), Houben, L. (mentor).

Subjects/Keywords: retrofitting; existing structures; Advanced Cementitious Materials

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APA (6^th Edition):

Wink, H. P. (. (2015). Retrofitting of Existing Infrastructure Structures with Advanced Cementitious Materials (ACM's). (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:b9218b73-ccd5-4cbc-b9d7-326440817b3b

Chicago Manual of Style (16^th Edition):

Wink, H P (author). “Retrofitting of Existing Infrastructure Structures with Advanced Cementitious Materials (ACM's).” 2015. Masters Thesis, Delft University of Technology. Accessed March 01, 2021. http://resolver.tudelft.nl/uuid:b9218b73-ccd5-4cbc-b9d7-326440817b3b.

MLA Handbook (7^th Edition):

Wink, H P (author). “Retrofitting of Existing Infrastructure Structures with Advanced Cementitious Materials (ACM's).” 2015. Web. 01 Mar 2021.

Vancouver:

Wink HP(. Retrofitting of Existing Infrastructure Structures with Advanced Cementitious Materials (ACM's). [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2021 Mar 01]. Available from: http://resolver.tudelft.nl/uuid:b9218b73-ccd5-4cbc-b9d7-326440817b3b.

Council of Science Editors:

Wink HP(. Retrofitting of Existing Infrastructure Structures with Advanced Cementitious Materials (ACM's). [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:b9218b73-ccd5-4cbc-b9d7-326440817b3b

Florida Atlantic University

10. Tauhiduzzaman, Mohammad. FACE/CORE DISBONDING FRACTURE OF HONEYCOMB CORE SANDWICH PANELS.

Degree: 2019, Florida Atlantic University

URL: http://fau.digital.flvc.org/islandora/object/fau:42217

►

The objective of the research presented in this thesis is to develop analysis and test procedures for the characterization of disbonding crack growth in a… (more)

Subjects/Keywords: Honeycomb structures; Fracture mechanics; Strength of materials; Airframes – Materials

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APA (6^th Edition):

Tauhiduzzaman, M. (2019). FACE/CORE DISBONDING FRACTURE OF HONEYCOMB CORE SANDWICH PANELS. (Thesis). Florida Atlantic University. Retrieved from http://fau.digital.flvc.org/islandora/object/fau:42217

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):

Tauhiduzzaman, Mohammad. “FACE/CORE DISBONDING FRACTURE OF HONEYCOMB CORE SANDWICH PANELS.” 2019. Thesis, Florida Atlantic University. Accessed March 01, 2021. http://fau.digital.flvc.org/islandora/object/fau:42217.

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

MLA Handbook (7^th Edition):

Tauhiduzzaman, Mohammad. “FACE/CORE DISBONDING FRACTURE OF HONEYCOMB CORE SANDWICH PANELS.” 2019. Web. 01 Mar 2021.

Vancouver:

Tauhiduzzaman M. FACE/CORE DISBONDING FRACTURE OF HONEYCOMB CORE SANDWICH PANELS. [Internet] [Thesis]. Florida Atlantic University; 2019. [cited 2021 Mar 01]. Available from: http://fau.digital.flvc.org/islandora/object/fau:42217.

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

Council of Science Editors:

Tauhiduzzaman M. FACE/CORE DISBONDING FRACTURE OF HONEYCOMB CORE SANDWICH PANELS. [Thesis]. Florida Atlantic University; 2019. Available from: http://fau.digital.flvc.org/islandora/object/fau:42217

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

Clemson University

11. Schultz, Jesse. Modeling and Finite Element Analysis Methods for the Dynamic Crushing of Honeycomb Cellular Meso-Structures.

Degree: MS, Mechanical Engineering, 2011, Clemson University

URL: https://tigerprints.clemson.edu/all_theses/1106

► The effective static mechanical properties, such as the moduli of elasticity and rigidity and Poisson's ratio, of honeycomb cellular meso-structures are capable of control due… (more)

Subjects/Keywords: Cellular Materials; FEA; Honeycomb; Impact; Meso-structures; Meta-Materials; Mechanical Engineering

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APA (6^th Edition):

Schultz, J. (2011). Modeling and Finite Element Analysis Methods for the Dynamic Crushing of Honeycomb Cellular Meso-Structures. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/1106

Chicago Manual of Style (16^th Edition):

Schultz, Jesse. “Modeling and Finite Element Analysis Methods for the Dynamic Crushing of Honeycomb Cellular Meso-Structures.” 2011. Masters Thesis, Clemson University. Accessed March 01, 2021. https://tigerprints.clemson.edu/all_theses/1106.

MLA Handbook (7^th Edition):

Schultz, Jesse. “Modeling and Finite Element Analysis Methods for the Dynamic Crushing of Honeycomb Cellular Meso-Structures.” 2011. Web. 01 Mar 2021.

Vancouver:

Schultz J. Modeling and Finite Element Analysis Methods for the Dynamic Crushing of Honeycomb Cellular Meso-Structures. [Internet] [Masters thesis]. Clemson University; 2011. [cited 2021 Mar 01]. Available from: https://tigerprints.clemson.edu/all_theses/1106.

Council of Science Editors:

Schultz J. Modeling and Finite Element Analysis Methods for the Dynamic Crushing of Honeycomb Cellular Meso-Structures. [Masters Thesis]. Clemson University; 2011. Available from: https://tigerprints.clemson.edu/all_theses/1106

Rice University

12. Gong, Yongji. 2D Materials in Lego Style: Synthesis, Characterizations and Applications.

Degree: PhD, Natural Sciences, 2015, Rice University

URL: http://hdl.handle.net/1911/87824

► Recently, the emergence and development of 2D materials with various optical and electrical properties has opened up new routes for electronic and optoelectronic device fabrication… (more)

▼ Recently, the emergence and development of 2D materials with various optical and electrical properties has opened up new routes for electronic and optoelectronic device fabrication based on atomically thin layers. For example, graphene behaves as a semi-metal with extremely high mobility, hexagonal boron nitride (h-BN) is a good insulator and monolayer TMDs such as MoS2, MoSe2 and WSe2 are semiconductors with direct band gap. This diversity offers the opportunity to construct atomically thin electronics based entirely on 2D materials. One of the most promising applications is to get 2D integrated circuits to replace the traditional silicon based ones, which will be much thinner and faster. 2D materials can be considered to be analogous to Lego blocks. The Lego game is to use different Lego blocks to get a complicated Lego building. Similarly, we can use different 2D materials to get the corresponding integrated circuits or devices for energy related applications. Based on this purpose, we need different 2D blocks, which are the most fundamental parts in the 2D world, 2D materials with tunable properties, and different strategies to combine the 2D materials together. Chapter 1 focuses on synthesis, characterization and applications of pristine 2D materials, which are the fundamental blocks for the 2D world. In this part, we synthesized different 2D materials such as insulator (h-BN), metal (graphene) and semiconductors (MX2, M = metal and X = chalcogen) for different applications. There are two directions in this part: one is to explore new 2D materials and the other one is to improve the growth of 2D materials to push them closer to their real applications. Moreover, semiconductors with different band gap (from 1.1 eV to 2.8 eV) and different type (p type and n type) have been developed. Furthermore, we improved the growth of different 2D materials to get their millimeter-scale single crystals or even continuous film. In the coming Chapter 2, we focused on the 2D alloys. The purpose of alloying 2D materials is to engineer the phase and band gap by changing the composition in the alloys. By this, we can tune the optical and electrical properties in 2D materials very easily. The first project in this part is about h-BNC system, which can open a band gap in graphene system, resulting in both high mobilities and high ON-OFF ratio in their transistors. Then we developed the MoS2-xSex (x, 0-2) alloys, in which the band gap can be continuously tuned from 1.50 eV to 1.84 eV. At last, RexMo1-xS2 (x, 0-1) system is developed to study the phase transition with different x. In Chapter 3, heterostructures based on different 2D materials are developed by different strategies. For example, we can get h-BN/h-BNC/graphene lateral heterostructure by combing a conversion method and lithography. We also developed the heterostructures based on MoS2/WS2 and MoSe2/WSe2 by a one-step growth method and two-step growth method, respectively. In both of them, we can get the in-plane and vertical heterostructures. The interface of the in-plane… Advisors/Committee Members: Ajayan, Pulickel M. (advisor), Jun, Lou (committee member), Marti, Angel (committee member).

Subjects/Keywords: 2D materials; pristine 2D materials; alloying 2D materials; 2D heterostructures; 3D structures; energy

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APA (6^th Edition):

Gong, Y. (2015). 2D Materials in Lego Style: Synthesis, Characterizations and Applications. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/87824

Chicago Manual of Style (16^th Edition):

Gong, Yongji. “2D Materials in Lego Style: Synthesis, Characterizations and Applications.” 2015. Doctoral Dissertation, Rice University. Accessed March 01, 2021. http://hdl.handle.net/1911/87824.

MLA Handbook (7^th Edition):

Gong, Yongji. “2D Materials in Lego Style: Synthesis, Characterizations and Applications.” 2015. Web. 01 Mar 2021.

Vancouver:

Gong Y. 2D Materials in Lego Style: Synthesis, Characterizations and Applications. [Internet] [Doctoral dissertation]. Rice University; 2015. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1911/87824.

Council of Science Editors:

Gong Y. 2D Materials in Lego Style: Synthesis, Characterizations and Applications. [Doctoral Dissertation]. Rice University; 2015. Available from: http://hdl.handle.net/1911/87824

13. Cao, Lingling. Analyse mathématique de modèles de structures électroniques de matériaux avec défauts : Mathematical analysis of electronic structure models for defected materials.

Degree: Docteur es, Mathématiques, 2019, Université Paris-Est

URL: http://www.theses.fr/2019PESC1028

►

Cette thèse porte sur l’analyse mathématique de modèles de structures électroniques de matériaux présentant des défauts, elle contient trois sujets différents. Dans le chapitre 2,… (more)

Subjects/Keywords: Analyse mathématique; Structures électroniques; Matériaux avec défauts; Mathematical analysis; Electronic structures; Defected materials; 510

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APA (6^th Edition):

Cao, L. (2019). Analyse mathématique de modèles de structures électroniques de matériaux avec défauts : Mathematical analysis of electronic structure models for defected materials. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2019PESC1028

Chicago Manual of Style (16^th Edition):

Cao, Lingling. “Analyse mathématique de modèles de structures électroniques de matériaux avec défauts : Mathematical analysis of electronic structure models for defected materials.” 2019. Doctoral Dissertation, Université Paris-Est. Accessed March 01, 2021. http://www.theses.fr/2019PESC1028.

MLA Handbook (7^th Edition):

Cao, Lingling. “Analyse mathématique de modèles de structures électroniques de matériaux avec défauts : Mathematical analysis of electronic structure models for defected materials.” 2019. Web. 01 Mar 2021.

Vancouver:

Cao L. Analyse mathématique de modèles de structures électroniques de matériaux avec défauts : Mathematical analysis of electronic structure models for defected materials. [Internet] [Doctoral dissertation]. Université Paris-Est; 2019. [cited 2021 Mar 01]. Available from: http://www.theses.fr/2019PESC1028.

Council of Science Editors:

Cao L. Analyse mathématique de modèles de structures électroniques de matériaux avec défauts : Mathematical analysis of electronic structure models for defected materials. [Doctoral Dissertation]. Université Paris-Est; 2019. Available from: http://www.theses.fr/2019PESC1028

Cal Poly

14. Carter, Jeffrey Scott. Effects of Low Velocity Impact on the Flexural Strength of Composite Sandwich Structures.

Degree: MS, Aerospace Engineering, 2014, Cal Poly

URL: https://digitalcommons.calpoly.edu/theses/1327 ; 10.15368/theses.2014.164

► The use of composite sandwich structures is rapidly increasing in the aerospace industry because of their increased strength-to-weight and stiffness-to-weight characteristics. The effects of… (more)

▼ The use of composite sandwich structures is rapidly increasing in the aerospace industry because of their increased strength-to-weight and stiffness-to-weight characteristics. The effects of low velocity impacts on these structures, however, are the main weakness that hinders further use of them in the industry because the damages from these loadings can often be catastrophic. Impact behavior of composite materials in general is a crucial consideration for a designer but can be difficult to describe theoretically. Because of this, experimental analysis is typically used to attempt to describe the behavior of composite sandwiches under impact loads. Experimental testing can still be unpredictable, however, because low velocity impacts can cause undetectable damage within the composites that weaken their structural integrity. This is an important issue with composite sandwich structures because interlaminar damage within the composite facesheets is typical with composites but the addition of a core material results in added failure modes. Because the core is typically a weaker material than the surrounding facesheet material, the core is easily damaged by the impact loads. The adhesion between the composite facesheets and the core material can also be a major region of concern for sandwich structures. Delamination of the facesheet from the core is a major issue when these structures are subjected to impact loads. This study investigated, through experimental and numerical analysis, how varying the core and facesheet material combination affected the flexural strength of a composite sandwich subjected to low velocity impact. Carbon, hemp, aramid, and glass fiber materials as facesheets combined with honeycomb and foam as core materials were considered. Three layers of the same composite material were laid on the top and bottom of the core material to form each sandwich structure. This resulted in eight different sandwich designs. The carbon fiber/honeycomb sandwiches were then combined with the aramid fiber facesheets, keeping the same three layer facesheet design, to form two hybrid sandwich designs. This was done to attempt to improve the impact resistance and post-impact strength characteristics of the carbon fiber sandwiches. The two and one layer aramid fiber laminates on these hybrid sandwiches were always laid up on the outside of the structure. The sandwiches were cured using a composite press set to the recommended curing cycle for the composite facesheet material. The hybrid sandwiches were cured twice for the two different facesheet materials. The cured specimens were then cut into 3 inch by 10 inch sandwiches and 2/3 of them were subjected to an impact from a 7.56 lbf crosshead which was dropped from a height of 38.15 inches above the bottom of the specimen using a Dynatup 8250 drop weight machine. The impacted specimen and the control specimen (1/3 of the specimens not subjected to an impact) were loaded in a four-point bend test per ASTM D7250 to determine the non-impacted and post-impact… Advisors/Committee Members: Dr. Faysal Kolkailah.

Subjects/Keywords: Aerospace Engineering; Composite Materials; Composite Sandwich Structures; Impact Testing; Four-Point Bend Testing; Structures and Materials

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APA (6^th Edition):

Carter, J. S. (2014). Effects of Low Velocity Impact on the Flexural Strength of Composite Sandwich Structures. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/1327 ; 10.15368/theses.2014.164

Chicago Manual of Style (16^th Edition):

Carter, Jeffrey Scott. “Effects of Low Velocity Impact on the Flexural Strength of Composite Sandwich Structures.” 2014. Masters Thesis, Cal Poly. Accessed March 01, 2021. https://digitalcommons.calpoly.edu/theses/1327 ; 10.15368/theses.2014.164.

MLA Handbook (7^th Edition):

Carter, Jeffrey Scott. “Effects of Low Velocity Impact on the Flexural Strength of Composite Sandwich Structures.” 2014. Web. 01 Mar 2021.

Vancouver:

Carter JS. Effects of Low Velocity Impact on the Flexural Strength of Composite Sandwich Structures. [Internet] [Masters thesis]. Cal Poly; 2014. [cited 2021 Mar 01]. Available from: https://digitalcommons.calpoly.edu/theses/1327 ; 10.15368/theses.2014.164.

Council of Science Editors:

Carter JS. Effects of Low Velocity Impact on the Flexural Strength of Composite Sandwich Structures. [Masters Thesis]. Cal Poly; 2014. Available from: https://digitalcommons.calpoly.edu/theses/1327 ; 10.15368/theses.2014.164

NSYSU

15. Chang, Hsiao-wen. Electric-Field Effects on Magnetic Properties of (Ga,Mn)Sb Channel in Field-Effect Structures.

Degree: PhD, Physics, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1124114-185048

► This thesis investigates the magnetotransport properties of ultrathin (Ga,Mn)Sb layers in a field-effect structure. We fabricate a metal-insulator-semiconductor field-effect structure with a thin (Ga,Mn)Sb channel… (more)

Subjects/Keywords: Magnetic materials; Field effect structures; Semiconducting IIIâV materials; Antimonides; Molecular beam epitaxy

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APA (6^th Edition):

Chang, H. (2015). Electric-Field Effects on Magnetic Properties of (Ga,Mn)Sb Channel in Field-Effect Structures. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1124114-185048

Chicago Manual of Style (16^th Edition):

Chang, Hsiao-wen. “Electric-Field Effects on Magnetic Properties of (Ga,Mn)Sb Channel in Field-Effect Structures.” 2015. Doctoral Dissertation, NSYSU. Accessed March 01, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1124114-185048.

MLA Handbook (7^th Edition):

Chang, Hsiao-wen. “Electric-Field Effects on Magnetic Properties of (Ga,Mn)Sb Channel in Field-Effect Structures.” 2015. Web. 01 Mar 2021.

Vancouver:

Chang H. Electric-Field Effects on Magnetic Properties of (Ga,Mn)Sb Channel in Field-Effect Structures. [Internet] [Doctoral dissertation]. NSYSU; 2015. [cited 2021 Mar 01]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1124114-185048.

Council of Science Editors:

Chang H. Electric-Field Effects on Magnetic Properties of (Ga,Mn)Sb Channel in Field-Effect Structures. [Doctoral Dissertation]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1124114-185048

University of California – Merced

16. Diaz Moreno, Miguel Fernando. An Integrated Study of the Porous Structure and Mechanical Properties of Diatoms.

Degree: Biological Engineering and Small-scale Technologies, 2015, University of California – Merced

URL: http://www.escholarship.org/uc/item/3g83t614

► Diatoms are microscopic algae featuring porous cell wall structures (frustules). Due to the wide variety of diatom shapes and intricate architectures, diatom frustules are viable… (more)

▼ Diatoms are microscopic algae featuring porous cell wall structures (frustules). Due to the wide variety of diatom shapes and intricate architectures, diatom frustules are viable prototypes to guide the design and fabrication of nanodevices for applications ranging from sensors to nanotemplates. The porous structure and mechanical behavior of biosilica diatom frustules were evaluated through ambient nanoindentation, AFM-based nanoindentation and finite element method (FEM) analysis. Two diatom species, Coscinodiscus sp. (centric) and Synedra sp. (pennate), were investigated through ambient nanoindentation and FEM simulation. High-resolution microscopy unveiled the diatom species structures. These diatom frustule dimensions varied largely depending on diatom species (diameters from 70-250 μm and lengths from 100-300 μm) with pore diameters ranging from 0.1-3.0 μm. Young’s modulus E and hardness H of the diatom frustules were obtained via ambient nanoindentation. These values varied also depending on diatom species: E from 1.1-10.6 GPa, H from 0.10-1.03 GPa for the Coscinodiscus sp.; and E from 13.7-18.6 GPa, H from 0.85-1.41 GPa for the Synedra sp. Predictive FEM simulations were performed on well-validated 3D frustule models, to correlate the mechanical response with specific morphology variables such as pore sizes. A correlation between mechanical properties and porosity was established for selected frustules. Furthermore, AFM investigation and FEM simulation involving 3D frustule models with hierarchical geometries were achieved to investigate the structure-property relationship upon compressive loads. AFM imaging and AFM-based nanoindentation of the centric and pennate frustules provided surface morphology and associated load-displacement curves, which were used to further characterize the diatoms. The calculated average E was 21.5 GPa and 26 GPa for the Coscinodiscus sp. and Synedra sp. respectively, which are higher than the values obtained from ambient nanoindentation. FEM compression simulations were also performed on centric models only to study the role of the hierarchical structures on their mechanical response. Displacement and stress distributions of a three-layered hierarchical frustule model under varied loads were systematically investigated. Results were compared with a stacking of three porous layers for further discussion. Suggestions for future experiments and modeling efforts are provided to enhance the ability to map strategies for the fabrication of 3D nanostructures and nanodevices.

Subjects/Keywords: Materials Science; Nanoscience; Engineering; Bioinspired materials; Diatoms; FEM simulations; Hierarchical structures; Nanomechanical experiment

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APA (6^th Edition):

Diaz Moreno, M. F. (2015). An Integrated Study of the Porous Structure and Mechanical Properties of Diatoms. (Thesis). University of California – Merced. Retrieved from http://www.escholarship.org/uc/item/3g83t614

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):

Diaz Moreno, Miguel Fernando. “An Integrated Study of the Porous Structure and Mechanical Properties of Diatoms.” 2015. Thesis, University of California – Merced. Accessed March 01, 2021. http://www.escholarship.org/uc/item/3g83t614.

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

MLA Handbook (7^th Edition):

Diaz Moreno, Miguel Fernando. “An Integrated Study of the Porous Structure and Mechanical Properties of Diatoms.” 2015. Web. 01 Mar 2021.

Vancouver:

Diaz Moreno MF. An Integrated Study of the Porous Structure and Mechanical Properties of Diatoms. [Internet] [Thesis]. University of California – Merced; 2015. [cited 2021 Mar 01]. Available from: http://www.escholarship.org/uc/item/3g83t614.

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

Council of Science Editors:

Diaz Moreno MF. An Integrated Study of the Porous Structure and Mechanical Properties of Diatoms. [Thesis]. University of California – Merced; 2015. Available from: http://www.escholarship.org/uc/item/3g83t614

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

Cal Poly

17. Hallak, Yanina Soledad. DESIGN, MANUFACTURE, DYNAMIC TESTING, AND FINITE ELEMENT ANALYSIS OF A COMPOSITE 6U CUBESAT.

Degree: MS, Aerospace Engineering, 2016, Cal Poly

URL: https://digitalcommons.calpoly.edu/theses/1572 ; 10.15368/theses.2016.49

► CubeSats, specially the 6U standard, is nowadays the tendency where many developers point towards. The upscaling size of the standard and payloads entail the… (more)

Subjects/Keywords: CubeSat; Random Vibration; Mechanical Shock; Composite Materials; Finite Element Analysis; Small Satellites; Structures and Materials

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APA (6^th Edition):

Hallak, Y. S. (2016). DESIGN, MANUFACTURE, DYNAMIC TESTING, AND FINITE ELEMENT ANALYSIS OF A COMPOSITE 6U CUBESAT. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/1572 ; 10.15368/theses.2016.49

Chicago Manual of Style (16^th Edition):

Hallak, Yanina Soledad. “DESIGN, MANUFACTURE, DYNAMIC TESTING, AND FINITE ELEMENT ANALYSIS OF A COMPOSITE 6U CUBESAT.” 2016. Masters Thesis, Cal Poly. Accessed March 01, 2021. https://digitalcommons.calpoly.edu/theses/1572 ; 10.15368/theses.2016.49.

MLA Handbook (7^th Edition):

Hallak, Yanina Soledad. “DESIGN, MANUFACTURE, DYNAMIC TESTING, AND FINITE ELEMENT ANALYSIS OF A COMPOSITE 6U CUBESAT.” 2016. Web. 01 Mar 2021.

Vancouver:

Hallak YS. DESIGN, MANUFACTURE, DYNAMIC TESTING, AND FINITE ELEMENT ANALYSIS OF A COMPOSITE 6U CUBESAT. [Internet] [Masters thesis]. Cal Poly; 2016. [cited 2021 Mar 01]. Available from: https://digitalcommons.calpoly.edu/theses/1572 ; 10.15368/theses.2016.49.

Council of Science Editors:

Hallak YS. DESIGN, MANUFACTURE, DYNAMIC TESTING, AND FINITE ELEMENT ANALYSIS OF A COMPOSITE 6U CUBESAT. [Masters Thesis]. Cal Poly; 2016. Available from: https://digitalcommons.calpoly.edu/theses/1572 ; 10.15368/theses.2016.49

Utah State University

18. Christensen, Justin. Electron Yield Measurements of High-Yield, Low-Conductivity Dielectric Materials.

Degree: MS, Physics, 2017, Utah State University

URL: https://digitalcommons.usu.edu/etd/6694

► Materials exposed to the space plasma environment acquire electric charge, which can have harmful effects if it leads to arcing or electrostatic breakdown of… (more)

▼ Materials exposed to the space plasma environment acquire electric charge, which can have harmful effects if it leads to arcing or electrostatic breakdown of important spacecraft components. In fact, spacecraft charging is the leading environmentally induced cause of spacecraft anomalies. This study focuses on measuring electron yield, a property of materials that describes how many electrons are ejected from a material under energetic electron bombardment, which can vary depending on the energy of incident electrons. Intrinsic electron yield is defined as the average number of electrons emitted per incident electron from an electrically neutral material. The specific aim of this work is to improve yield measurements for insulator materials, which can be difficult to test using conventional methods due to charge accumulation in insulators.Most studies of electron yield use a steady current electron beam in a vacuum chamber to irradiate materials to be tested. By comparing the amount of current deposited in the material to the total incident current, the emitted current can be calculated. This works well for conductors; however, insulators charge up quickly, which either repel incident electrons or reattract emitted electrons producing erroneous yield measurements. This study improves on methods that use a pulsed electron beam to measure yield with small amounts of charge per pulse, as well as neutralization methods to dissipate stored charge between pulse measurements.The improvements to instrumentation and data analysis techniques are quantified to demonstrate their validity. These improvements will allow for continued studies on extreme insulator materials. Future studies will provide new understanding of interactions between electron radiation and materials, which will allow for better modeling of spacecraft charging and the development of materials that meet desired electron emission specifications. Advisors/Committee Members: JR Dennison, D Mark Riffe, Farrell Edwards, ;.

Subjects/Keywords: Electron Yield; Charge Neutralization; Space Environment; Insulating Materials; Aerospace Engineering; Structures and Materials

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APA (6^th Edition):

Christensen, J. (2017). Electron Yield Measurements of High-Yield, Low-Conductivity Dielectric Materials. (Masters Thesis). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/6694

Chicago Manual of Style (16^th Edition):

Christensen, Justin. “Electron Yield Measurements of High-Yield, Low-Conductivity Dielectric Materials.” 2017. Masters Thesis, Utah State University. Accessed March 01, 2021. https://digitalcommons.usu.edu/etd/6694.

MLA Handbook (7^th Edition):

Christensen, Justin. “Electron Yield Measurements of High-Yield, Low-Conductivity Dielectric Materials.” 2017. Web. 01 Mar 2021.

Vancouver:

Christensen J. Electron Yield Measurements of High-Yield, Low-Conductivity Dielectric Materials. [Internet] [Masters thesis]. Utah State University; 2017. [cited 2021 Mar 01]. Available from: https://digitalcommons.usu.edu/etd/6694.

Council of Science Editors:

Christensen J. Electron Yield Measurements of High-Yield, Low-Conductivity Dielectric Materials. [Masters Thesis]. Utah State University; 2017. Available from: https://digitalcommons.usu.edu/etd/6694

Stellenbosch University

19. Neethling, Christoffel Johannes. Evaluation of bio-inspired composite structures for impact materials.

Degree: MEng, Mechanical and Mechatronic Engineering, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/98598

ENGLISH ABSTRACT: Please refer to full text for abstract.

AFRIKAANSE OPSOMMING: Raadpleeg teks vir opsomming.

Advisors/Committee Members: Groenwold, Albert, Parker, Sa-aadat, Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering..

Subjects/Keywords: Impact materials; Bio-inspired composite structures – Evaluation; UCTD

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APA (6^th Edition):

Neethling, C. J. (2016). Evaluation of bio-inspired composite structures for impact materials. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/98598

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):

Neethling, Christoffel Johannes. “Evaluation of bio-inspired composite structures for impact materials.” 2016. Thesis, Stellenbosch University. Accessed March 01, 2021. http://hdl.handle.net/10019.1/98598.

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

MLA Handbook (7^th Edition):

Neethling, Christoffel Johannes. “Evaluation of bio-inspired composite structures for impact materials.” 2016. Web. 01 Mar 2021.

Vancouver:

Neethling CJ. Evaluation of bio-inspired composite structures for impact materials. [Internet] [Thesis]. Stellenbosch University; 2016. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10019.1/98598.

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

Council of Science Editors:

Neethling CJ. Evaluation of bio-inspired composite structures for impact materials. [Thesis]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/98598

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

North Carolina State University

20. Burgun, Robert Scott. The Design, Analysis, Construction and Testing of an Uninhabited Aero Vehicle Platform.

Degree: MS, Aerospace Engineering, 2003, North Carolina State University

URL: http://www.lib.ncsu.edu/resolver/1840.16/1158

► An uninhabited aero vehicle platform design is presented. This encompasses the landing gear system and the structures of the vehicle. The landing gear system consisted… (more)

Subjects/Keywords: UAV; Structures; Composite Materials

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APA (6^th Edition):

Burgun, R. S. (2003). The Design, Analysis, Construction and Testing of an Uninhabited Aero Vehicle Platform. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/1158

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):

Burgun, Robert Scott. “The Design, Analysis, Construction and Testing of an Uninhabited Aero Vehicle Platform.” 2003. Thesis, North Carolina State University. Accessed March 01, 2021. http://www.lib.ncsu.edu/resolver/1840.16/1158.

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

MLA Handbook (7^th Edition):

Burgun, Robert Scott. “The Design, Analysis, Construction and Testing of an Uninhabited Aero Vehicle Platform.” 2003. Web. 01 Mar 2021.

Vancouver:

Burgun RS. The Design, Analysis, Construction and Testing of an Uninhabited Aero Vehicle Platform. [Internet] [Thesis]. North Carolina State University; 2003. [cited 2021 Mar 01]. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1158.

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

Council of Science Editors:

Burgun RS. The Design, Analysis, Construction and Testing of an Uninhabited Aero Vehicle Platform. [Thesis]. North Carolina State University; 2003. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1158

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

University of Toronto

21. Jeronimo, David Mark. Scalable Approach for Extrusion and Perfusion of Tubular, Heterotypic Biomaterials.

Degree: 2014, University of Toronto

URL: http://hdl.handle.net/1807/68081

►

Soft material tubes are critical in the vasculature of mammalian tissues, forming networks of blood vessels and airways. Homogeneous and heterogeneous hydrogel tubes were extruded… (more)

Subjects/Keywords: 3D Bioprinting; Hydrogels; Perfusable Materials; Tubular Structures; 0541

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APA (6^th Edition):

Jeronimo, D. M. (2014). Scalable Approach for Extrusion and Perfusion of Tubular, Heterotypic Biomaterials. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/68081

Chicago Manual of Style (16^th Edition):

Jeronimo, David Mark. “Scalable Approach for Extrusion and Perfusion of Tubular, Heterotypic Biomaterials.” 2014. Masters Thesis, University of Toronto. Accessed March 01, 2021. http://hdl.handle.net/1807/68081.

MLA Handbook (7^th Edition):

Jeronimo, David Mark. “Scalable Approach for Extrusion and Perfusion of Tubular, Heterotypic Biomaterials.” 2014. Web. 01 Mar 2021.

Vancouver:

Jeronimo DM. Scalable Approach for Extrusion and Perfusion of Tubular, Heterotypic Biomaterials. [Internet] [Masters thesis]. University of Toronto; 2014. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1807/68081.

Council of Science Editors:

Jeronimo DM. Scalable Approach for Extrusion and Perfusion of Tubular, Heterotypic Biomaterials. [Masters Thesis]. University of Toronto; 2014. Available from: http://hdl.handle.net/1807/68081

University of Toronto

22. Chen, Haotian. One Step Formation of Heterogeneous Tubular Biomaterials and Stimulus Responsive Hydrogels.

Degree: 2014, University of Toronto

URL: http://hdl.handle.net/1807/68576

►

Tubular structures are fundamental constituents of plant, animal and human tissues. Synthetically prepared biomaterial tubular constructs have a variety of applications that include engineered blood… (more)

Subjects/Keywords: Bioprinting; Hydrogels; Soft materials; Spatial heterogeneities; Stimulus Responsive; Tubular structures; 0541

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APA (6^th Edition):

Chen, H. (2014). One Step Formation of Heterogeneous Tubular Biomaterials and Stimulus Responsive Hydrogels. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/68576

Chicago Manual of Style (16^th Edition):

Chen, Haotian. “One Step Formation of Heterogeneous Tubular Biomaterials and Stimulus Responsive Hydrogels.” 2014. Masters Thesis, University of Toronto. Accessed March 01, 2021. http://hdl.handle.net/1807/68576.

MLA Handbook (7^th Edition):

Chen, Haotian. “One Step Formation of Heterogeneous Tubular Biomaterials and Stimulus Responsive Hydrogels.” 2014. Web. 01 Mar 2021.

Vancouver:

Chen H. One Step Formation of Heterogeneous Tubular Biomaterials and Stimulus Responsive Hydrogels. [Internet] [Masters thesis]. University of Toronto; 2014. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1807/68576.

Council of Science Editors:

Chen H. One Step Formation of Heterogeneous Tubular Biomaterials and Stimulus Responsive Hydrogels. [Masters Thesis]. University of Toronto; 2014. Available from: http://hdl.handle.net/1807/68576

Colorado State University

23. Peterson, Kirsten LaRhea. Mechanics of plastic-aluminum composite I-beams, The.

Degree: MS(M.S.), Civil and Environmental Engineering, 2014, Colorado State University

URL: http://hdl.handle.net/10217/82630

► This thesis presents an initial investigation of the mechanics of I-beams developed with plastic-aluminum composite technology. Plastic-aluminum composites in structural beam/frame/truss elements are a relatively… (more)

Subjects/Keywords: beam mechanics; structures; plastic-metal composites; I-beams; composite materials

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APA (6^th Edition):

Peterson, K. L. (2014). Mechanics of plastic-aluminum composite I-beams, The. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/82630

Chicago Manual of Style (16^th Edition):

Peterson, Kirsten LaRhea. “Mechanics of plastic-aluminum composite I-beams, The.” 2014. Masters Thesis, Colorado State University. Accessed March 01, 2021. http://hdl.handle.net/10217/82630.

MLA Handbook (7^th Edition):

Peterson, Kirsten LaRhea. “Mechanics of plastic-aluminum composite I-beams, The.” 2014. Web. 01 Mar 2021.

Vancouver:

Peterson KL. Mechanics of plastic-aluminum composite I-beams, The. [Internet] [Masters thesis]. Colorado State University; 2014. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10217/82630.

Council of Science Editors:

Peterson KL. Mechanics of plastic-aluminum composite I-beams, The. [Masters Thesis]. Colorado State University; 2014. Available from: http://hdl.handle.net/10217/82630

Edith Cowan University

24. Wild, Graham. Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles.

Degree: 2010, Edith Cowan University

URL: https://ro.ecu.edu.au/theses/1873

► The use of distributed optical fibre smart sensors for the detection of acoustic signals in the Structural Health Monitoring (SHM) of robust aerospace vehicles has… (more)

▼ The use of distributed optical fibre smart sensors for the detection of acoustic signals in the Structural Health Monitoring (SHM) of robust aerospace vehicles has been demonstrated. Current distributed optical fibre sensors are multiplexed along a single fibre. Inherent problems exist with a multiplexed architecture. Two significant issues are; the possibility of fibre breakage, and the possibility of failure of the single transmitter, the single receiver, or the single processor. In a ‘smart’ architecture, the intelligence, as well as the sensors, is distributed. Hence, if destructive damage occurs, then the SHM system can continue to operate in all other locations on the vehicle, making the system robust. Work on the optical fibre sensors was limited to acoustic signals. This included acoustic emissions, acousto-ultrasonics, acoustic transmissions and other dynamic strain signals. Fibre Bragg Gratings (FBGs) were chosen as the optical fibre sensor for the detection of the acoustic signals. FBGs offer significant advantages over other types of optical fibre sensors. The most significant of these is the ease of multiplexing and their versatility, i.e. the ability of FBGs to detect a significant number of measurands. In the work on optical fibre sensing, we showed the implementation of an innovative detection system. This Transmit Reflect Detection System (TRDS) made use of both the transmitted and reflected signals from the FBG. The TRDS is an improvement on conventional power detection where either the transmitted or reflected component is used. The TRDS was used to successfully detect all types of dynamic and static signals, the most significant being the acoustic emission from a lead pencil break test. The use of the FBG sensor as a receiver for acoustic communications was also shown. Acoustic communications have been proposed for use in the SHM of robust aerospace vehicles with the use of autonomous agents, e.g. inspection or repair robots. The FBG receivers were compared with PZT receivers. When communicating through aluminium, the FBG performance was not as good as the PZT receiver, specifically due to the properties of the FBG which limit the frequency response. However, in Carbon Fibre Composites (CFC), the FBG outperformed the PZT due to the properties of the CFC. We also note that when contained within the thermal packaging the FBG had a very interesting frequency response, likely due to the suspended beam nature of the structure. This type of packaging could be used to tune the response of the FBG sensor. The work on the distributed optical fibre smart sensors showed the implementation of a Smart Transducer Interface Module (STIM), which used the TRDS with a Digital Signal Processor (DSP). The output of the TRDS was differentially amplified with a high speed amplifier, and the output was passed to the ADC onboard the DSP. The DSP was also used to toggle on and off output, including closed loop actuation, and controlling a 1550nm laser, which would represent the source used in the implemented system. The…

Subjects/Keywords: Aerospace vehicles; optical fibre; autonomous; Aerospace Engineering; Structures and Materials

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APA (6^th Edition):

Wild, G. (2010). Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles. (Thesis). Edith Cowan University. Retrieved from https://ro.ecu.edu.au/theses/1873

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):

Wild, Graham. “Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles.” 2010. Thesis, Edith Cowan University. Accessed March 01, 2021. https://ro.ecu.edu.au/theses/1873.

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

MLA Handbook (7^th Edition):

Wild, Graham. “Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles.” 2010. Web. 01 Mar 2021.

Vancouver:

Wild G. Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles. [Internet] [Thesis]. Edith Cowan University; 2010. [cited 2021 Mar 01]. Available from: https://ro.ecu.edu.au/theses/1873.

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

Council of Science Editors:

Wild G. Distributed optical fibre smart sensors for acoustic sensing in the structural health monitoring of robust aerospace vehicles. [Thesis]. Edith Cowan University; 2010. Available from: https://ro.ecu.edu.au/theses/1873

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

Embry-Riddle Aeronautical University

25. Rovik, Christopher Lee. Classification of In-Flight Fatigue Cracks in Aircraft Structures using Acoustic Emission and Neural Networks.

Degree: MSin Aerospace Engineering, Graduate Studies, 1998, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/db-theses/231

► The research encompassed within this paper deals with the analysis and classification of fatigue cracks in aircraft structures. The particular structure that was examined… (more)

▼ The research encompassed within this paper deals with the analysis and classification of fatigue cracks in aircraft structures. The particular structure that was examined was the vertical tail section of a Cessna T-303 Crusader aircraft. The analysis was performed using the nondestructive evaluation technique known as acoustic emission (AE), as well as the artificial intelligence of neural networks. Data were taken in a controlled laboratory environment as well as in a flying testbed aboard the aircraft. The first part of the research involved the analysis of a typical aircraft structure in a controlled laboratory environment. This support structure was fabricated from 7075-T6 aluminum, which is common in aircraft structures. Two different methods were used to fatigue the support, an MTS tensile test machine and a shaker table. Extensive AE data were taken throughout the laboratory tests in order to provide a known reference for the identification of fatigue cracks. The acoustic emission data derived from the laboratory tests were thoroughly examined and sorted into three distinct mechanisms: fatigue cracking, plastic deformation, and mechanical noise. The AE parameters associated with these mechanisms were in turn used to train a neural network. The neural network used was the Kohonen self-organizing map, as it is an excellent choice for the purpose of classification. Once the neural network was trained, it was possible to proceed to the second stage of the research. A support structure, identical to the one used in the laboratory tests, was installed in the vertical tail of the T-303 aircraft. Acoustic emission data were gathered during all aspects of aircraft maneuvers, from the initial taxiing and takeoff to the final approach and landing, including rolls and Dutch rolls. The AE parameters recorded from the in-flight tests were processed using the neural network trained in the first part of the research. Thus, the data were classified as being indicative of fatigue cracking, plastic deformation, or rubbing. These mechanisms were then analyzed with respect to the particular maneuver performed to further understand the stresses associated with different maneuvers. As a result of the ability to classify fatigue cracks, it is possible to develop a monitoring system for aircraft to determine the existence of fatigue cracks before they grow to the point where they become dangerous. Advisors/Committee Members: Dr. Eric v. K. Hill, Dr. Frank J. Radosta, Dr. James G. Ladesic.

Subjects/Keywords: Aerospace Engineering; Structures and Materials

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APA (6^th Edition):

Rovik, C. L. (1998). Classification of In-Flight Fatigue Cracks in Aircraft Structures using Acoustic Emission and Neural Networks. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/db-theses/231

Chicago Manual of Style (16^th Edition):

Rovik, Christopher Lee. “Classification of In-Flight Fatigue Cracks in Aircraft Structures using Acoustic Emission and Neural Networks.” 1998. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 01, 2021. https://commons.erau.edu/db-theses/231.

MLA Handbook (7^th Edition):

Rovik, Christopher Lee. “Classification of In-Flight Fatigue Cracks in Aircraft Structures using Acoustic Emission and Neural Networks.” 1998. Web. 01 Mar 2021.

Vancouver:

Rovik CL. Classification of In-Flight Fatigue Cracks in Aircraft Structures using Acoustic Emission and Neural Networks. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 1998. [cited 2021 Mar 01]. Available from: https://commons.erau.edu/db-theses/231.

Council of Science Editors:

Rovik CL. Classification of In-Flight Fatigue Cracks in Aircraft Structures using Acoustic Emission and Neural Networks. [Masters Thesis]. Embry-Riddle Aeronautical University; 1998. Available from: https://commons.erau.edu/db-theses/231

Embry-Riddle Aeronautical University

26. Nguyen, Tuan-Khoi Dang. Damage Assessment and Strength Predictions in S-Glass/Epoxy Laminates Subjected to Low Energy Impact.

Degree: Master of Aerospace Engineering, Graduate Studies, 2005, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/db-theses/248

► Composite materials have become one of the leading materials for manufacturing in the aerospace industry today. Compared to "conventional" aerospace metals, composites generally have… (more)

▼ Composite materials have become one of the leading materials for manufacturing in the aerospace industry today. Compared to "conventional" aerospace metals, composites generally have higher strength-to-weight and stiffness-to-weight ratios, good fatigue and corrosion resistance and reduced parts count. However, like any other material, they also have disadvantages. They are inherently brittle and are thus prone to impact damage. Low energy/velocity impact damage, in particular, can be dangerous because the damage oftentimes goes undetected and can subsequently grow under load. Also known as barely visible impact damage (BVID), this area of concentration focuses on the small-scale damage that may be very difficult to detect yet can be lethal. The primary emphasis of this research is to predict the residual compressive strength of a 16-ply laminate [(0°/±45°/90°)2]s after experiencing low energy/velocity impact using combined technical approaches of ultrasonic C-scan and neural networks. To accomplish this, each test specimen was ultrasonically C-scanned after impact testing. A MATLAB computer program was then used to convert the image files into numeric data, which they were presented to a backpropagation neural network in order to predict the residual compressive strength. Microsoft Excel was used to take the average of the diagonal values of the normalized image data. Here the average prediction error turned out to be 3.9 percent, while the worst-case prediction error was 14.6 percent. This research also focused on identifying, sorting, and classifying how the composite laminates failed under compression after experiencing low energy/low velocity impact. Acoustic emission (AE) parameter data were collected during compression testing, and then inputted into an artificial neural network (ANN) for classification. Specifically a Kohonen Self Organizing Map (SOM) was used to sort and classify the failure mechanisms that occurred within the weakened composites. The associated BVID failure modes, otherwise known as failure mechanisms, were believed to consist primarily of transverse and longitudinal matrix cracks, delaminations, and occasionally fiber breaks. Even though delaminations are the most critical failure modes in BVID under compression, the other failure mechanisms also contribute significantly. Furthermore, it appeared that it was also possible to sort out and determine the transition regions between BVID and visible impact damage (VID) with AE data. Thus, it is important to know how the material fails so that necessary precautions can be taken to minimize these critical failure modes. Advisors/Committee Members: Dr. Yi Zhao, Dr. Eric v. K. Hill, Dr. David J. Sypeck.

Subjects/Keywords: Aerospace Engineering; Structures and Materials

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APA (6^th Edition):

Nguyen, T. D. (2005). Damage Assessment and Strength Predictions in S-Glass/Epoxy Laminates Subjected to Low Energy Impact. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/db-theses/248

Chicago Manual of Style (16^th Edition):

Nguyen, Tuan-Khoi Dang. “Damage Assessment and Strength Predictions in S-Glass/Epoxy Laminates Subjected to Low Energy Impact.” 2005. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 01, 2021. https://commons.erau.edu/db-theses/248.

MLA Handbook (7^th Edition):

Nguyen, Tuan-Khoi Dang. “Damage Assessment and Strength Predictions in S-Glass/Epoxy Laminates Subjected to Low Energy Impact.” 2005. Web. 01 Mar 2021.

Vancouver:

Nguyen TD. Damage Assessment and Strength Predictions in S-Glass/Epoxy Laminates Subjected to Low Energy Impact. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2005. [cited 2021 Mar 01]. Available from: https://commons.erau.edu/db-theses/248.

Council of Science Editors:

Nguyen TD. Damage Assessment and Strength Predictions in S-Glass/Epoxy Laminates Subjected to Low Energy Impact. [Masters Thesis]. Embry-Riddle Aeronautical University; 2005. Available from: https://commons.erau.edu/db-theses/248

Embry-Riddle Aeronautical University

27. Thornton, Weldon Paul. Classification of Acoustic Emission Signals from an Aluminum Pressure Vessel Using a Self-Organizing Map.

Degree: MSin Aerospace Engineering, Aerospace Engineering, 1995, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/db-theses/198

► Acoustic emission nondestructive testing has been used for real-time monitoring of complex structures. All of the structures were made of materials at least 0.070… (more)

Subjects/Keywords: Aerospace Engineering; Structures and Materials

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APA (6^th Edition):

Thornton, W. P. (1995). Classification of Acoustic Emission Signals from an Aluminum Pressure Vessel Using a Self-Organizing Map. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/db-theses/198

Chicago Manual of Style (16^th Edition):

Thornton, Weldon Paul. “Classification of Acoustic Emission Signals from an Aluminum Pressure Vessel Using a Self-Organizing Map.” 1995. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 01, 2021. https://commons.erau.edu/db-theses/198.

MLA Handbook (7^th Edition):

Thornton, Weldon Paul. “Classification of Acoustic Emission Signals from an Aluminum Pressure Vessel Using a Self-Organizing Map.” 1995. Web. 01 Mar 2021.

Vancouver:

Thornton WP. Classification of Acoustic Emission Signals from an Aluminum Pressure Vessel Using a Self-Organizing Map. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 1995. [cited 2021 Mar 01]. Available from: https://commons.erau.edu/db-theses/198.

Council of Science Editors:

Thornton WP. Classification of Acoustic Emission Signals from an Aluminum Pressure Vessel Using a Self-Organizing Map. [Masters Thesis]. Embry-Riddle Aeronautical University; 1995. Available from: https://commons.erau.edu/db-theses/198

Embry-Riddle Aeronautical University

28. Savella, Philip A. Maneuvering Control of a Spacecraft with Propellant Sloshing.

Degree: MSin Space Science, Physical Sciences, 2005, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/db-theses/178

► Propellant slosh has been a problem studied in spacecraft designs since the early days of large, liquid-fuel rockets. The conventional design solution involves physical… (more)

Subjects/Keywords: Space Vehicles; Structures and Materials

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APA (6^th Edition):

Savella, P. A. (2005). Maneuvering Control of a Spacecraft with Propellant Sloshing. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/db-theses/178

Chicago Manual of Style (16^th Edition):

Savella, Philip A. “Maneuvering Control of a Spacecraft with Propellant Sloshing.” 2005. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 01, 2021. https://commons.erau.edu/db-theses/178.

MLA Handbook (7^th Edition):

Savella, Philip A. “Maneuvering Control of a Spacecraft with Propellant Sloshing.” 2005. Web. 01 Mar 2021.

Vancouver:

Savella PA. Maneuvering Control of a Spacecraft with Propellant Sloshing. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2005. [cited 2021 Mar 01]. Available from: https://commons.erau.edu/db-theses/178.

Council of Science Editors:

Savella PA. Maneuvering Control of a Spacecraft with Propellant Sloshing. [Masters Thesis]. Embry-Riddle Aeronautical University; 2005. Available from: https://commons.erau.edu/db-theses/178

Embry-Riddle Aeronautical University

29. Schmidt, Ryan C. An Intelligible Software (CFA) Approach for Fiber-Reinforced Laminate Failure Analysis Including a Piecewise Representation of the Tsai-Wu Failure Criterion Using Excel and MatLab.

Degree: MSin Aerospace Engineering, Aerospace Engineering, 2009, Embry-Riddle Aeronautical University

URL: https://commons.erau.edu/db-theses/182

► Present generations rely heavily on the use of petroleum as their primary means of transportation. As the cost of petroleum continues to escalate, the… (more)

▼ Present generations rely heavily on the use of petroleum as their primary means of transportation. As the cost of petroleum continues to escalate, the need for lightweight structures for vehicle applications becomes more evident. The ability to engineer materials so that they possess desired application specific properties and characteristics has made tremendous progress in the past century. Consequently, the use of these composite materials for aircraft weight reduction has been investigated for decades. The aerospace industry often uses composite materials to make a laminated composite structure where each constituent ply of the laminate has its own material properties. This anisotropic behavior of a fiber-reinforced laminate (FRL) is discussed methodically throughout this research. Moreover, the successful design of an FRL is dependent upon the accuracy of analyzing its structural limits. Therefore, the failure criteria used to specify an FRL's failure limits are significant. Although useful formulaic methods have been developed for analyzing fiber-reinforced laminates, these calculations can be quite tedious when used in an iterative structural design process. Development of software that can conduct computer-aided laminate failure analysis can provide an indispensable tool for the design of fiber-reinforced laminate composites. Hence, this research focuses on the development of such software, CFA (Composite Failure Analysis). Even though fiber-reinforced laminate failure analysis is not a trivial topic, CFA was developed to provide a knowledgeable engineer with an intelligible software utensil for the design of fiber-reinforced laminates. Additionally, CFA's simplistic exploitation of Excel® and MatLab® make it an indispensable tool for engineering education instruction. CFA exhibits an immense potential for the advancement of Embry-Riddle Aeronautical University's educational prowess in the field of composite materials. With its ability to perform fiber-reinforced laminate failure analysis using the universal engineering software platforms of Excel® and MatLab®, CFA provides the university with a novel capability for future composite materials research. Advisors/Committee Members: Dr. Yi Zhao, Dr. Magdy Attia, Dr. Frank Radosta.

Subjects/Keywords: Aerospace Engineering; Structures and Materials

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

APA (6^th Edition):

Schmidt, R. C. (2009). An Intelligible Software (CFA) Approach for Fiber-Reinforced Laminate Failure Analysis Including a Piecewise Representation of the Tsai-Wu Failure Criterion Using Excel and MatLab. (Masters Thesis). Embry-Riddle Aeronautical University. Retrieved from https://commons.erau.edu/db-theses/182

Chicago Manual of Style (16^th Edition):

Schmidt, Ryan C. “An Intelligible Software (CFA) Approach for Fiber-Reinforced Laminate Failure Analysis Including a Piecewise Representation of the Tsai-Wu Failure Criterion Using Excel and MatLab.” 2009. Masters Thesis, Embry-Riddle Aeronautical University. Accessed March 01, 2021. https://commons.erau.edu/db-theses/182.

MLA Handbook (7^th Edition):

Schmidt, Ryan C. “An Intelligible Software (CFA) Approach for Fiber-Reinforced Laminate Failure Analysis Including a Piecewise Representation of the Tsai-Wu Failure Criterion Using Excel and MatLab.” 2009. Web. 01 Mar 2021.

Vancouver:

Schmidt RC. An Intelligible Software (CFA) Approach for Fiber-Reinforced Laminate Failure Analysis Including a Piecewise Representation of the Tsai-Wu Failure Criterion Using Excel and MatLab. [Internet] [Masters thesis]. Embry-Riddle Aeronautical University; 2009. [cited 2021 Mar 01]. Available from: https://commons.erau.edu/db-theses/182.

Council of Science Editors:

Schmidt RC. An Intelligible Software (CFA) Approach for Fiber-Reinforced Laminate Failure Analysis Including a Piecewise Representation of the Tsai-Wu Failure Criterion Using Excel and MatLab. [Masters Thesis]. Embry-Riddle Aeronautical University; 2009. Available from: https://commons.erau.edu/db-theses/182

University of Colorado

30. Metts, Jonathan Glen. Assessing feasibility of electrochromic space suit radiators for reducing extravehicular activity water consumption.

Degree: PhD, Aerospace Engineering Sciences, 2010, University of Colorado

URL: https://scholar.colorado.edu/asen_gradetds/10

► Water consumption for space suit thermal control is a limiting factor on long-term space exploration missions. A concept is proposed for an integrated, flexible… (more)

Subjects/Keywords: electrochromic; extravehicular; lunar; radiator; Aerospace Engineering; Structures and Materials

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

APA (6^th Edition):

Metts, J. G. (2010). Assessing feasibility of electrochromic space suit radiators for reducing extravehicular activity water consumption. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/asen_gradetds/10

Chicago Manual of Style (16^th Edition):

Metts, Jonathan Glen. “Assessing feasibility of electrochromic space suit radiators for reducing extravehicular activity water consumption.” 2010. Doctoral Dissertation, University of Colorado. Accessed March 01, 2021. https://scholar.colorado.edu/asen_gradetds/10.

MLA Handbook (7^th Edition):

Metts, Jonathan Glen. “Assessing feasibility of electrochromic space suit radiators for reducing extravehicular activity water consumption.” 2010. Web. 01 Mar 2021.

Vancouver:

Metts JG. Assessing feasibility of electrochromic space suit radiators for reducing extravehicular activity water consumption. [Internet] [Doctoral dissertation]. University of Colorado; 2010. [cited 2021 Mar 01]. Available from: https://scholar.colorado.edu/asen_gradetds/10.

Council of Science Editors:

Metts JG. Assessing feasibility of electrochromic space suit radiators for reducing extravehicular activity water consumption. [Doctoral Dissertation]. University of Colorado; 2010. Available from: https://scholar.colorado.edu/asen_gradetds/10

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