subject:(Laminated Composites)

Univerzitet u Beogradu

1. Kreculj, Dragan D., 1975-. Modeliranje udarnog oštećenja u laminarnim kompozitnim strukturama.

Degree: Mašinski fakultet, 2014, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:7469/bdef:Content/get

►

Vazduhoplovstvo-Strukturalna analiza / Aerospace Engineering-Structural Analysis

U doktorskoj tezi razmatran je problem modeliranja udarnih oštećenja u laminiranim kompozitnim strukturama. Udari u određene strukture uzrokuju oštećenja,… (more)

Subjects/Keywords: laminated composites; impact; damage modeling

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Kreculj, Dragan D., 1. (2014). Modeliranje udarnog oštećenja u laminarnim kompozitnim strukturama. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:7469/bdef:Content/get

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):

Kreculj, Dragan D., 1975-. “Modeliranje udarnog oštećenja u laminarnim kompozitnim strukturama.” 2014. Thesis, Univerzitet u Beogradu. Accessed March 08, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:7469/bdef:Content/get.

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

MLA Handbook (7^th Edition):

Kreculj, Dragan D., 1975-. “Modeliranje udarnog oštećenja u laminarnim kompozitnim strukturama.” 2014. Web. 08 Mar 2021.

Vancouver:

Kreculj, Dragan D. 1. Modeliranje udarnog oštećenja u laminarnim kompozitnim strukturama. [Internet] [Thesis]. Univerzitet u Beogradu; 2014. [cited 2021 Mar 08]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:7469/bdef:Content/get.

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

Council of Science Editors:

Kreculj, Dragan D. 1. Modeliranje udarnog oštećenja u laminarnim kompozitnim strukturama. [Thesis]. Univerzitet u Beogradu; 2014. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:7469/bdef:Content/get

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

Hong Kong University of Science and Technology

2. Shanmugam, Logesh MAE. Manufacturing and mechanical properties of integrated thermoplastic-based Ti-FML composites via surface modification.

Degree: 2020, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-105169 ; https://doi.org/10.14711/thesis-991012818564803412 ; http://repository.ust.hk/ir/bitstream/1783.1-105169/1/th_redirect.html

► Fiber metal laminates (FMLs) are a sandwich combination of alternate layer of metal and fiber-reinforced polymer (FRP) which has excellent specific strength, fatigue, stiffness and… (more)

▼ Fiber metal laminates (FMLs) are a sandwich combination of alternate layer of metal and fiber-reinforced polymer (FRP) which has excellent specific strength, fatigue, stiffness and has potential application in defence, aerospace, marine, and automotive due to its high impact resistance. Sandwich combination of ultra-high molecular weight polyethylene (UHMWPE) fiber and an infusible thermoplastic Elium^® matrix forms a complete thermoplastic FRP composite. Combining UHMWPE/Elium^® composites with titanium metal alloy forms a hybrid UHMWPE-Ti FML which can be a promising material system for impact damage problems. In achieving optimal performance of this hybrid composite system, interfaces in the composite system play a critical role, which includes a fiber-matrix interface, interlaminar interface, and metal thermoplastic composite interface (MTCI). Therefore, proper tuning of these interfaces determines the overall performance of the hybrid composite system. Two different strategies have been adopted to improve the interfacial properties of the UHMWPE-Ti composites: i) modification of the interfaces in UHMWPE fiber-reinforced system, and ii) tuning of the MTCI via the surface treatment of titanium alloy. Multiwalled carbon nanotubes (MWCNTs) are incorporated into dopamine coating solution and applied onto UHMWPE fiber surface to enhance the interfacial bonding in UHMWPE fiber-reinforced system. The results from the transverse tensile fiber bundle test (TFBT) shows the interfacial strength of the prepared multi-scale phase reinforced composite (MPRC) can be significantly increased in comparison with that of the common composite. It is observed that densification of CNTs forest within the interphase between UHMWPE fiber and thermoplastic matrix during the formation of the nano-composite coating can lead to a high-volume fraction of CNTs within the interphase and augment effects of interface-interlocking, which makes the coating-modification method a more efficient way than a traditional matrix-tuning method for improving interfacial bonding. Results from double cantilever beam (DCB) test at 1 mm/min shows improvement in Mode I interlaminar fracture toughness (G_IC) for PDA (polydopamine) surface-treated sample and PDA with embedded MWCNT when compared with that of a common composite (UHMWPE/Elium^®) The surface of titanium alloy is treated by traditional anodization with post-processing of etching and annealing, which is multiple processing steps to improve the MTCI. The generated oxide layer on the metal alloy has the potential to react with recyclable thermoplastic Elium^® resin matrix by the organo-metallic complex, facilitating the wettability of resin on the Ti metal surface. The double cantilever beam test was utilised to evaluate the G_IC (Mode I interlaminar fracture toughness at MTCI) for the FML sample with surface treated fiber (PDA and PDA+CNT) and metal. The result shows, after the fiber and metal surface treatment, the average G_1C can…

Subjects/Keywords: Fibrous composites ; Mechanical properties ; Thermoplastic composites ; Laminated materials ; Laminated metals

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Shanmugam, L. M. (2020). Manufacturing and mechanical properties of integrated thermoplastic-based Ti-FML composites via surface modification. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-105169 ; https://doi.org/10.14711/thesis-991012818564803412 ; http://repository.ust.hk/ir/bitstream/1783.1-105169/1/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):

Shanmugam, Logesh MAE. “Manufacturing and mechanical properties of integrated thermoplastic-based Ti-FML composites via surface modification.” 2020. Thesis, Hong Kong University of Science and Technology. Accessed March 08, 2021. http://repository.ust.hk/ir/Record/1783.1-105169 ; https://doi.org/10.14711/thesis-991012818564803412 ; http://repository.ust.hk/ir/bitstream/1783.1-105169/1/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):

Shanmugam, Logesh MAE. “Manufacturing and mechanical properties of integrated thermoplastic-based Ti-FML composites via surface modification.” 2020. Web. 08 Mar 2021.

Vancouver:

Shanmugam LM. Manufacturing and mechanical properties of integrated thermoplastic-based Ti-FML composites via surface modification. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2020. [cited 2021 Mar 08]. Available from: http://repository.ust.hk/ir/Record/1783.1-105169 ; https://doi.org/10.14711/thesis-991012818564803412 ; http://repository.ust.hk/ir/bitstream/1783.1-105169/1/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:

Shanmugam LM. Manufacturing and mechanical properties of integrated thermoplastic-based Ti-FML composites via surface modification. [Thesis]. Hong Kong University of Science and Technology; 2020. Available from: http://repository.ust.hk/ir/Record/1783.1-105169 ; https://doi.org/10.14711/thesis-991012818564803412 ; http://repository.ust.hk/ir/bitstream/1783.1-105169/1/th_redirect.html

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

Texas A&M University

3. Ai, Yin. Effects of Manufacturing Induced Defects on Mixed-Mode Delamination Kinking in Composite Laminates.

Degree: MS, Aerospace Engineering, 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/174202

► With the superior mechanical performance, such as high strength and stiffness, fiber-reinforced polymer composites are widely used on main structures, like airfoil for aircraft or… (more)

▼ With the superior mechanical performance, such as high strength and stiffness, fiber-reinforced polymer composites are widely used on main structures, like airfoil for aircraft or wind turbine. Manufacturing induced defects draw people’s attention for a long time and porosity content was characterized as critical factor that would destroy composite structure. In recent years, it has been noticed that rather than defects’ content, the shape, size and distribution are also important. Some of the research focused on influence of defects on crack propagation along interface. Not much attention has been placed on effects for delamination crack kinking. In the current study, in order to explore how voids affect composites delamination kinking, a double cantilever beam (DCB) model with a delamination pre-crack was simulated under tensile loading condition. By a revised Virtual Crack Closure Technic, the strain energy release rates for crack extension in Mode I and Mode II were evaluated. A parametric research was performed with present of various shapes and sizes of voids in resin area. With applying the mixed-mode fracture criterion, the potential kinking angle was determined. In addition, the effects of circular voids in resin area after delamination kinked out was also examined. Some of the following results have been found. The delamination in the current DCB model is Mode I dominated fracture process. The failure is governed by dilatational energy and it’s an elastic failure problem. Voids located in resin-reach area cause stress perturbation at crack tip and activate the delamination kinking at around 15-degree angle. The parametric study of voids with different geometry shows that elliptical voids compared with circular ones are more threatening to crack branching out. Size of voids is also a critical character that with identical distance from crack tip, larger voids accrete the crack kinking possibility. More importantly, distance between of crack tip and voids, regardless of their size and shape, is the most crucial factor for delamination kinking. Advisors/Committee Members: Talreja, Ramesh (advisor), Naraghi, Mohammad (committee member), Reddy, Junuthula N. (committee member).

Subjects/Keywords: Delamination kinking; Void; DCB; Laminated composites; FEM

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Ai, Y. (2015). Effects of Manufacturing Induced Defects on Mixed-Mode Delamination Kinking in Composite Laminates. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174202

Chicago Manual of Style (16^th Edition):

Ai, Yin. “Effects of Manufacturing Induced Defects on Mixed-Mode Delamination Kinking in Composite Laminates.” 2015. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/174202.

MLA Handbook (7^th Edition):

Ai, Yin. “Effects of Manufacturing Induced Defects on Mixed-Mode Delamination Kinking in Composite Laminates.” 2015. Web. 08 Mar 2021.

Vancouver:

Ai Y. Effects of Manufacturing Induced Defects on Mixed-Mode Delamination Kinking in Composite Laminates. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/174202.

Council of Science Editors:

Ai Y. Effects of Manufacturing Induced Defects on Mixed-Mode Delamination Kinking in Composite Laminates. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/174202

4. Le Mauff, Camille. Sur la gestion des bandes de localisations dans les composites stratifiés avec un modèle d'endommagement à taux limité : On the calculation of damage localization in laminated composite structures.

Degree: Docteur es, Mécanique, génie mécanique, génie civil, 2013, Cachan, Ecole normale supérieure

URL: http://www.theses.fr/2012DENS0005

►

L'utilisation de limiteurs de localisation est nécessaire pour prendre en compte l'apparition de macro-fissures lors de la simulation de l'évolution des dégradations dans les matériaux… (more)

▼

L'utilisation de limiteurs de localisation est nécessaire pour prendre en compte l'apparition de macro-fissures lors de la simulation de l'évolution des dégradations dans les matériaux composites stratifiés en accord avec des expérimentations. Ceux-ci introduisent un paramètre qui peut être relié à une longueur, ou un temps caractéristique, qui peut alors être identifié. L'approche introduite au LMT-Cachan consiste, dans le cadre dynamique, à utiliser un modèle d'endommagement retardé. Elle est basée sur le fait qu'une fissure ne peut pas apparaître instantanément. Ce modèle donne d'excellents résultats en restant dans le cadre de la dynamique et a l'avantage d'être local en espace. Cependant il requiert une discrétisation temporelle de la taille du temps caractéristique introduit (de l'ordre de la microseconde pour les composites), qui le rend inexploitable pour des simulations de chargement en quasi-statique. Les simulations dans ces cas de chargement nécessitent donc l'utilisation d'un temps caractéristique différent de celui identifié qui ne permet plus de maintenir un résultat en accord avec l'expérience. On cherche alors à adapter les paramètres de la loi d'évolution de l'endommagement afin d'obtenir une propagation de la macro-fissure dans la zone localisée qui soit compatible énergétiquement avec la mécanique de la rupture en contrôlant le taux de restitution d'énergie. Ce travail est dédié à maintenir l'objectivité de la solution et à adapter l'énergie dissipé à la mécanique de la rupture afin de pouvoir utiliser un temps caractéristique exploitable lors de simulations d'éprouvettes en composites sous un chargement quasi-statique.

The use of localization limiters is needed to take into account the apparition of macro-cracks during the simulation of the evolution of degradations in laminated composite materials with respect to experiments. Those introduce a parameter which can be related to a characteristic length, or a characteristic time, and therefore be identified. The approach introduced at LMT-Cachan is, in dynamics, to use a delayed damage model. It's based on the fact that a crack can't appear instantaneously. This model gives excellent results in dynamics and has the advantage to be local in space. Unfortunately, it requires a time discretization related to the characteristic time introduced (of the order of a microsecond for composites), which is far too computationally expensive for quasi-static simulations. Simulations in these loading cases need the use of a different characteristic time from the one identified which can't maintain anymore a result in accordance to experiments. We then adapt the parameters of the damage evolution law to obtain a propagation of a macro-crack in the localized zone that is energetically compatible with fracture mechanics by controlling the strain energy release rate. This work is dedicated to maintain the objectivity of the solution and to adapt the dissipated energy to fracture mechanics to be able to use a characteristic time exploitable for the simulation of…

Advisors/Committee Members: Ladevèze, Pierre (thesis director).

Subjects/Keywords: Composites stratifiés; Endommagement; Laminated composite structures; Damage

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Le Mauff, C. (2013). Sur la gestion des bandes de localisations dans les composites stratifiés avec un modèle d'endommagement à taux limité : On the calculation of damage localization in laminated composite structures. (Doctoral Dissertation). Cachan, Ecole normale supérieure. Retrieved from http://www.theses.fr/2012DENS0005

Chicago Manual of Style (16^th Edition):

Le Mauff, Camille. “Sur la gestion des bandes de localisations dans les composites stratifiés avec un modèle d'endommagement à taux limité : On the calculation of damage localization in laminated composite structures.” 2013. Doctoral Dissertation, Cachan, Ecole normale supérieure. Accessed March 08, 2021. http://www.theses.fr/2012DENS0005.

MLA Handbook (7^th Edition):

Le Mauff, Camille. “Sur la gestion des bandes de localisations dans les composites stratifiés avec un modèle d'endommagement à taux limité : On the calculation of damage localization in laminated composite structures.” 2013. Web. 08 Mar 2021.

Vancouver:

Le Mauff C. Sur la gestion des bandes de localisations dans les composites stratifiés avec un modèle d'endommagement à taux limité : On the calculation of damage localization in laminated composite structures. [Internet] [Doctoral dissertation]. Cachan, Ecole normale supérieure; 2013. [cited 2021 Mar 08]. Available from: http://www.theses.fr/2012DENS0005.

Council of Science Editors:

Le Mauff C. Sur la gestion des bandes de localisations dans les composites stratifiés avec un modèle d'endommagement à taux limité : On the calculation of damage localization in laminated composite structures. [Doctoral Dissertation]. Cachan, Ecole normale supérieure; 2013. Available from: http://www.theses.fr/2012DENS0005

University of Bristol

5. Patni, Mayank. An efficient numerical framework for capturing localised 3D stress fields in laminated composites.

Degree: PhD, 2019, University of Bristol

URL: http://hdl.handle.net/1983/f8ad5874-2657-4f4a-838b-2a46adda7fe5

► Composite materials offer considerable advantages in the impetus towards lightweighting and therefore the exploitation of fibre-reinforced composites in engineering structures has been steadily diversifying from… (more)

▼ Composite materials offer considerable advantages in the impetus towards lightweighting and therefore the exploitation of fibre-reinforced composites in engineering structures has been steadily diversifying from e.g. sports equipment and racing cars, to helicopters and commercial aeroplanes. Furthermore, recent advancements in composite manufacturing technology have facilitated the use of complex configurations inindustrial design applications. For reliable design of multilayered structures, accurate stress analysis tools are required. However, with an increasing structural complexity, predicting structure's response can be non-intuitive and often can not be modelled adequately using classical lamination theory. High-fidelity finite element methods (FEM) are often employed to obtain reliable three-dimensional (3D) stress analyses with the desired level of accuracy. However, these models are computationally expensive and are prohibitive for iterative design studies. Consequently, over the years, several one-dimensional (1D) and two-dimensional (2D) models based on higher-order theories have been proposed for the analysis of multilayered composite structures with the aim of predicting accurate 3D stress fields in a computationally efficient manner. The majority of these numerical models either lack kinematic fidelity or accuracy in capturing localised regions of the structure, or have limited capabilities to model complex structures. The work presented here uses the Unified Formulation (UF) that supersedes classical theories by exploiting a compact, hierarchical notation that allows most classic and recent theories to be retrieved from one, hence unified, model. Importantly, and unlike many classic theories, the UF applies to the partial differential equations governing three-dimensional elasticity. Full stress and strain fields are, therefore, recovered by its implementation. Although current implementations are found wanting in this respect, in a UF setting, complex geometries could easily be analysed. This is because the displacement field is expressed by means of classic 1D (beam-like case) and 2D (plate- and shell-like cases) finite element elements that need not be prismatic. Additional expansion functions are employed to approximate 3D kinematics over cross-sections (beam-like case) and through-thickness (plate- and shell-like cases). In the present work, the 1D UF is adopted and developed further by introducing a hierarchical, Serendipity Lagrange polynomials-based, cross-sectional expansion model. The 3D stress predicting capabilities of the proposed model is verified against high-fidelity finite element models and other numerical and experimental results available in the literature by means of static analyses of isotropic, constant- and variable stiffness laminated composite, beam-like and stiffened structures. Special attention is given to the accuracy of the model in capturing 3D stress response in the localised regions, such as near geometric or constitutive discontinuities, constraints and point of load…

Subjects/Keywords: 629.1; laminated composites; stress fields; finite element analysis; unified formulation

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Patni, M. (2019). An efficient numerical framework for capturing localised 3D stress fields in laminated composites. (Doctoral Dissertation). University of Bristol. Retrieved from http://hdl.handle.net/1983/f8ad5874-2657-4f4a-838b-2a46adda7fe5

Chicago Manual of Style (16^th Edition):

Patni, Mayank. “An efficient numerical framework for capturing localised 3D stress fields in laminated composites.” 2019. Doctoral Dissertation, University of Bristol. Accessed March 08, 2021. http://hdl.handle.net/1983/f8ad5874-2657-4f4a-838b-2a46adda7fe5.

MLA Handbook (7^th Edition):

Patni, Mayank. “An efficient numerical framework for capturing localised 3D stress fields in laminated composites.” 2019. Web. 08 Mar 2021.

Vancouver:

Patni M. An efficient numerical framework for capturing localised 3D stress fields in laminated composites. [Internet] [Doctoral dissertation]. University of Bristol; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1983/f8ad5874-2657-4f4a-838b-2a46adda7fe5.

Council of Science Editors:

Patni M. An efficient numerical framework for capturing localised 3D stress fields in laminated composites. [Doctoral Dissertation]. University of Bristol; 2019. Available from: http://hdl.handle.net/1983/f8ad5874-2657-4f4a-838b-2a46adda7fe5

University of Manchester

6. Haji Kamis, Haji Elmi Bin. Three dimensional analysis of fibre reinforced polymer laminated composites.

Degree: PhD, 2012, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/three-dimensional-analysis-of-fibre-reinforced-polymer-laminated-composites(0ba2ceae-129c-4d09-bdbd-de110e7b3617).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555543

► The thesis presents the structural behaviour of fibre reinforced polymer (FRP) laminated composites based on 3D elasticity formulation and finite element modeling using Abaqus. This… (more)

▼ The thesis presents the structural behaviour of fibre reinforced polymer (FRP) laminated composites based on 3D elasticity formulation and finite element modeling using Abaqus. This investigation into the performance of the laminate included subjecting it to various parameters i.e. different boundary conditions, material properties and loading conditions to examine the structural responses of deformation and stress. Both analytical and numerical investigations were performed to determine the stress and displacement distributions at any point of the laminates. Other investigative work undertaken in this study includes the numerical analysis of the effect of flexural deformation of the FRP strengthened RC slab. The formulation of 3D elasticity and enforced boundary conditions were applied to establish the state equation of the laminated composites. Transfer matrix and recursive solutions were then used to produce analytical solutions which satisfied all the boundary conditions throughout all the layers of the composites. These analytical solutions were then compared with numerical analysis through one of the commercial finite element analysis programs, Abaqus. Out of wide variety of element types available in the Abaqus element library, shells and solids elements are chosen to model the composites. From these FEM results, comparison can be made to the solution obtained from the analytical. The novel work and results presented in this thesis are the analysis of fully clamped laminated composite plates. The breakthrough results of fully clamped laminated composite plate can be used as a benchmark for further investigation. These analytical solutions were verified with FEM solutions which showed that only the solid element (C3D20) exhibited close results to the exact solutions. However, FEM gave poor results on the transverse shear stresses particularly at the boundary edges. As an application of the work above, it is noticed that the FEM results for the FRP strengthened RC slab, agreed well with the experimental work conducted in the laboratory. The flexural capacity of the RC slab showed significant increase, both at service and ultimate limit states, after FRP sheets were applied at the bottom surface of the slab. Given the established and developed programming codes, exact solutions of deflection and stresses can be determined for any reduced material properties, boundary and loading conditions, using Mathematica.

Subjects/Keywords: 620.192; Laminated Plate; FRP; Composites; FEM; Concrete Slab; Elasticity

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Haji Kamis, H. E. B. (2012). Three dimensional analysis of fibre reinforced polymer laminated composites. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/three-dimensional-analysis-of-fibre-reinforced-polymer-laminated-composites(0ba2ceae-129c-4d09-bdbd-de110e7b3617).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555543

Chicago Manual of Style (16^th Edition):

Haji Kamis, Haji Elmi Bin. “Three dimensional analysis of fibre reinforced polymer laminated composites.” 2012. Doctoral Dissertation, University of Manchester. Accessed March 08, 2021. https://www.research.manchester.ac.uk/portal/en/theses/three-dimensional-analysis-of-fibre-reinforced-polymer-laminated-composites(0ba2ceae-129c-4d09-bdbd-de110e7b3617).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555543.

MLA Handbook (7^th Edition):

Haji Kamis, Haji Elmi Bin. “Three dimensional analysis of fibre reinforced polymer laminated composites.” 2012. Web. 08 Mar 2021.

Vancouver:

Haji Kamis HEB. Three dimensional analysis of fibre reinforced polymer laminated composites. [Internet] [Doctoral dissertation]. University of Manchester; 2012. [cited 2021 Mar 08]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/three-dimensional-analysis-of-fibre-reinforced-polymer-laminated-composites(0ba2ceae-129c-4d09-bdbd-de110e7b3617).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555543.

Council of Science Editors:

Haji Kamis HEB. Three dimensional analysis of fibre reinforced polymer laminated composites. [Doctoral Dissertation]. University of Manchester; 2012. Available from: https://www.research.manchester.ac.uk/portal/en/theses/three-dimensional-analysis-of-fibre-reinforced-polymer-laminated-composites(0ba2ceae-129c-4d09-bdbd-de110e7b3617).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555543

Delft University of Technology

7. Lambregts, Stef (author). Implementation of a ply inclination in the Classical Laminate Theory.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:df22b24d-0d37-47b1-9a45-e5a7f806bc4a

►

The use of the Classical Laminate Theory (CLT) is limited to laminates where all the fibres in a ply are oriented in the plane of… (more)

▼

The use of the Classical Laminate Theory (CLT) is limited to laminates where all the fibres in a ply are oriented in the plane of the laminate. In some applications, it is possible that the plies will start at the bottom of a laminate and end at the top of the laminate. This means an inclination is added to the plies, which creates an extra rotation in the fibre direction with respect to the plane of the laminate. Such a laminate with inclined plies is found for example in the skin of InfraCore panels. In the regular CLT, this extra rotation cannot be taken into account, thus the elastic behaviour of a laminate with inclined plies cannot be described properly. The extra rotation that occurs in a laminate with inclined plies has analytically been implemented in the regular CLT to obtain a modified CLT, which has been verified using Finite Element analyses. Using the modified CLT, a reduction in equivalent stiffness can be observed for a single unidirectional ply with an inclination in the fibre direction. The exact value of stiffness reduction strongly depends on the material properties and the lay-up of the laminate. For InfraCore skins, the stiffness reduction is very small (0.15%). Due to the inclination in the plies, the lay-up of the laminate differs along the length of the plate. As a result, the output of the modified CLT is only applicable to one location along the plate. Due to the lay-up differences, the equivalent stiffness will also differ along the inclination direction. The in-plane equivalent stiffnesses will be the highest for symmetric laminates, where the flexural equivalent stiffness will be the highest when the plies with the stiffest fibre direction are located on the outside of a laminate.

Civil Engineering | Structural Mechanics

Advisors/Committee Members: van der Meer, Frans (mentor), Sluijs, Bert (graduation committee), Pavlovic, Marko (graduation committee), van Cann, Koen (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: FRP; CLT; Laminated composites; Classical Laminate Theory; InfraCore

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Lambregts, S. (. (2019). Implementation of a ply inclination in the Classical Laminate Theory. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:df22b24d-0d37-47b1-9a45-e5a7f806bc4a

Chicago Manual of Style (16^th Edition):

Lambregts, Stef (author). “Implementation of a ply inclination in the Classical Laminate Theory.” 2019. Masters Thesis, Delft University of Technology. Accessed March 08, 2021. http://resolver.tudelft.nl/uuid:df22b24d-0d37-47b1-9a45-e5a7f806bc4a.

MLA Handbook (7^th Edition):

Lambregts, Stef (author). “Implementation of a ply inclination in the Classical Laminate Theory.” 2019. Web. 08 Mar 2021.

Vancouver:

Lambregts S(. Implementation of a ply inclination in the Classical Laminate Theory. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://resolver.tudelft.nl/uuid:df22b24d-0d37-47b1-9a45-e5a7f806bc4a.

Council of Science Editors:

Lambregts S(. Implementation of a ply inclination in the Classical Laminate Theory. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:df22b24d-0d37-47b1-9a45-e5a7f806bc4a

Clemson University

8. Abarotin, Cameron Alexander. An Experimental Study of Low Velocity Impact of Bistable Laminated CFRP Composites.

Degree: MS, Mechanical Engineering, 2018, Clemson University

URL: https://tigerprints.clemson.edu/all_theses/2961

► In recent years, laminated carbon fiber reinforced polymer (CFRP) composites have gained popularity in engineering applications due to their lightweight and strong mechanical properties. One… (more)

Subjects/Keywords: Bistable; CFRP; Composites; Experimental; Laminated; Low Velocity Impact

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Abarotin, C. A. (2018). An Experimental Study of Low Velocity Impact of Bistable Laminated CFRP Composites. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/2961

Chicago Manual of Style (16^th Edition):

Abarotin, Cameron Alexander. “An Experimental Study of Low Velocity Impact of Bistable Laminated CFRP Composites.” 2018. Masters Thesis, Clemson University. Accessed March 08, 2021. https://tigerprints.clemson.edu/all_theses/2961.

MLA Handbook (7^th Edition):

Abarotin, Cameron Alexander. “An Experimental Study of Low Velocity Impact of Bistable Laminated CFRP Composites.” 2018. Web. 08 Mar 2021.

Vancouver:

Abarotin CA. An Experimental Study of Low Velocity Impact of Bistable Laminated CFRP Composites. [Internet] [Masters thesis]. Clemson University; 2018. [cited 2021 Mar 08]. Available from: https://tigerprints.clemson.edu/all_theses/2961.

Council of Science Editors:

Abarotin CA. An Experimental Study of Low Velocity Impact of Bistable Laminated CFRP Composites. [Masters Thesis]. Clemson University; 2018. Available from: https://tigerprints.clemson.edu/all_theses/2961

University of Bristol

9. Patni, Mayank. An efficient numerical framework for capturing localised 3D stress fields in laminated composites.

Degree: PhD, 2019, University of Bristol

URL: https://research-information.bris.ac.uk/en/studentTheses/f8ad5874-2657-4f4a-838b-2a46adda7fe5 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.794514

► Composite materials offer considerable advantages in the impetus towards lightweighting and therefore the exploitation of fibre-reinforced composites in engineering structures has been steadily diversifying from… (more)

▼ Composite materials offer considerable advantages in the impetus towards lightweighting and therefore the exploitation of fibre-reinforced composites in engineering structures has been steadily diversifying from e.g. sports equipment and racing cars, to helicopters and commercial aeroplanes. Furthermore, recent advancements in composite manufacturing technology have facilitated the use of complex configurations inindustrial design applications. For reliable design of multilayered structures, accurate stress analysis tools are required. However, with an increasing structural complexity, predicting structure's response can be non-intuitive and often can not be modelled adequately using classical lamination theory. High-fidelity finite element methods (FEM) are often employed to obtain reliable three-dimensional (3D) stress analyses with the desired level of accuracy. However, these models are computationally expensive and are prohibitive for iterative design studies. Consequently, over the years, several one-dimensional (1D) and two-dimensional (2D) models based on higher-order theories have been proposed for the analysis of multilayered composite structures with the aim of predicting accurate 3D stress fields in a computationally efficient manner. The majority of these numerical models either lack kinematic fidelity or accuracy in capturing localised regions of the structure, or have limited capabilities to model complex structures. The work presented here uses the Unified Formulation (UF) that supersedes classical theories by exploiting a compact, hierarchical notation that allows most classic and recent theories to be retrieved from one, hence unified, model. Importantly, and unlike many classic theories, the UF applies to the partial differential equations governing three-dimensional elasticity. Full stress and strain fields are, therefore, recovered by its implementation. Although current implementations are found wanting in this respect, in a UF setting, complex geometries could easily be analysed. This is because the displacement field is expressed by means of classic 1D (beam-like case) and 2D (plate- and shell-like cases) finite element elements that need not be prismatic. Additional expansion functions are employed to approximate 3D kinematics over cross-sections (beam-like case) and through-thickness (plate- and shell-like cases). In the present work, the 1D UF is adopted and developed further by introducing a hierarchical, Serendipity Lagrange polynomials-based, cross-sectional expansion model. The 3D stress predicting capabilities of the proposed model is verified against high-fidelity finite element models and other numerical and experimental results available in the literature by means of static analyses of isotropic, constant- and variable stiffness laminated composite, beam-like and stiffened structures. Special attention is given to the accuracy of the model in capturing 3D stress response in the localised regions, such as near geometric or constitutive discontinuities, constraints and point of load…

Subjects/Keywords: 629.1; laminated composites; stress fields; finite element analysis; unified formulation

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Patni, M. (2019). An efficient numerical framework for capturing localised 3D stress fields in laminated composites. (Doctoral Dissertation). University of Bristol. Retrieved from https://research-information.bris.ac.uk/en/studentTheses/f8ad5874-2657-4f4a-838b-2a46adda7fe5 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.794514

Chicago Manual of Style (16^th Edition):

Patni, Mayank. “An efficient numerical framework for capturing localised 3D stress fields in laminated composites.” 2019. Doctoral Dissertation, University of Bristol. Accessed March 08, 2021. https://research-information.bris.ac.uk/en/studentTheses/f8ad5874-2657-4f4a-838b-2a46adda7fe5 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.794514.

MLA Handbook (7^th Edition):

Patni, Mayank. “An efficient numerical framework for capturing localised 3D stress fields in laminated composites.” 2019. Web. 08 Mar 2021.

Vancouver:

Patni M. An efficient numerical framework for capturing localised 3D stress fields in laminated composites. [Internet] [Doctoral dissertation]. University of Bristol; 2019. [cited 2021 Mar 08]. Available from: https://research-information.bris.ac.uk/en/studentTheses/f8ad5874-2657-4f4a-838b-2a46adda7fe5 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.794514.

Council of Science Editors:

Patni M. An efficient numerical framework for capturing localised 3D stress fields in laminated composites. [Doctoral Dissertation]. University of Bristol; 2019. Available from: https://research-information.bris.ac.uk/en/studentTheses/f8ad5874-2657-4f4a-838b-2a46adda7fe5 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.794514

Indian Institute of Science

10. Ameen, Maqsood Mohammed. Analysis of Thick Laminated Composite Beams using Variational Asymptotic Method.

Degree: MSc Engg, Faculty of Engineering, 2018, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/3720

► An asymptotically-exact methodology is presented for obtaining the cross-sectional stiffness matrix of a pre-twisted, moderately-thick beam having rectangular cross sections and made of transversely isotropic… (more)

Subjects/Keywords: Laminated Composite Beams; Asymptotic Method; Beams - Static Analysis; Laminated Composites; Variational Asymptotic Method (VAM); Beams - Cross-sectional Analysis; Aerospace Engineering

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Ameen, M. M. (2018). Analysis of Thick Laminated Composite Beams using Variational Asymptotic Method. (Masters Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3720

Chicago Manual of Style (16^th Edition):

Ameen, Maqsood Mohammed. “Analysis of Thick Laminated Composite Beams using Variational Asymptotic Method.” 2018. Masters Thesis, Indian Institute of Science. Accessed March 08, 2021. http://etd.iisc.ac.in/handle/2005/3720.

MLA Handbook (7^th Edition):

Ameen, Maqsood Mohammed. “Analysis of Thick Laminated Composite Beams using Variational Asymptotic Method.” 2018. Web. 08 Mar 2021.

Vancouver:

Ameen MM. Analysis of Thick Laminated Composite Beams using Variational Asymptotic Method. [Internet] [Masters thesis]. Indian Institute of Science; 2018. [cited 2021 Mar 08]. Available from: http://etd.iisc.ac.in/handle/2005/3720.

Council of Science Editors:

Ameen MM. Analysis of Thick Laminated Composite Beams using Variational Asymptotic Method. [Masters Thesis]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3720

Ryerson University

11. Krimbalis, Peter P. On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing.

Degree: 2009, Ryerson University

URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A1994

► The development of Fibre Metal Laminates (FMLs) for application into aerospace structures represents a paradigm shift in airframe and material technology. By consolidating both monlithic… (more)

▼ The development of Fibre Metal Laminates (FMLs) for application into aerospace structures represents a paradigm shift in airframe and material technology. By consolidating both monlithic metallic alloys and fibre reinforced composite layers, a new material structure is born exhibiting desired qualities emerging from its heterogeneous consituency. When mechanically fastened via pins, bolts and rivets, these laminated materials develop damage and ultimately fail via mechanisms that were not entirely understood and different than either their metallic or composite constituents. The development of a predictive methodology capable of characterizing how FMLs fastened with pins behave and fail would drastically reduce the amount of experimentation necessary for material qualification and be an invaluable design tool.The body of this thesis discusses the extension of the characteristic dimension approach to FMLS and the subsequent development of a new failure mechanism as part of a progressive damage infinte element (FE) modeling methodology with yielding, delamination and buckling representing the central tenets of the new mechanism. This yielding through delamination buckling (YDB) mechanism and progressive FE model were investigated through multiple experimental studies. The experimental investigations required the development of a protocol with emphasis on measuring deformation on a local scheme in addition to a global one. With the extended protocol employed, complete characterization of the material response was possbile and a new definition for yield in a pin bearing configuration was developed and subsequently extended to a tensile testing configuraiton. The performance of this yield definition was compared directly to existing definitions and was shown to be effective in both quasi-isotropic and orthotropic materials.The results of the experiments and FE simulations demonstrated that yielding (according to the new definition), buckling and delamination resulting in joint collapse and failure have all occurred within the stipulated predictions of the YDB mechanism. Advisors/Committee Members: Ryerson University (Degree grantor).

Subjects/Keywords: Airplanes – Fuselage – Materials; Airframes – Fatigue; Laminated materials – Mechanical properties; Laminated materials – Fracture – Mathematical models; Fibrous composites – Fracture – Mathematical models; Metallic composites – Fracture – Mathematical models

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Krimbalis, P. P. (2009). On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A1994

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):

Krimbalis, Peter P. “On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing.” 2009. Thesis, Ryerson University. Accessed March 08, 2021. https://digital.library.ryerson.ca/islandora/object/RULA%3A1994.

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

MLA Handbook (7^th Edition):

Krimbalis, Peter P. “On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing.” 2009. Web. 08 Mar 2021.

Vancouver:

Krimbalis PP. On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing. [Internet] [Thesis]. Ryerson University; 2009. [cited 2021 Mar 08]. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1994.

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

Council of Science Editors:

Krimbalis PP. On The Development Of A Strength Prediction Methodology For Fibre Metal Laminates In Pin Bearing. [Thesis]. Ryerson University; 2009. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1994

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

12. Le, Minh Quan. Modélisation et simulations des singularités dans les composites stratifiés. : Modeling and simulations of singularities in laminated composites.

Degree: Docteur es, Mécanique des solides, 2020, université Paris-Saclay

URL: http://www.theses.fr/2020UPASN005

►

L’industrie a de plus en plus recours aux matériaux composites, notamment dans des domaines clés comme la construction aéronautique et spatiale, l’automobile et l’éolien. Afin… (more)

▼

L’industrie a de plus en plus recours aux matériaux composites, notamment dans des domaines clés comme la construction aéronautique et spatiale, l’automobile et l’éolien. Afin de répondre aux exigences de réduction de masse (donc de carburant) tout en respectant les contraintes de tenue mécanique, la modélisation numérique fine du comportement des matériaux composites devient cruciale pour la conception et le dimensionnement des structures ainsi que la réduction des coûts associés aux essais.Le « mésomodèle » développé au LMT-Cachan depuis une trentaine d’années est une modélisation multiéchelle des dégradations, destinée aux composites stratifiés à matrice organique carbon/époxy. Il permet de conserver des coûts de calculs raisonnables pour traiter des structures de complexité industrielle. Ce modèle a été implémenté et est commercialisé dans le code commercial SAMCEF. Cependant, la pertinence de ce modèle pour les pièces composites avec concentrations de contraintes demeure problématique dans certaines situations particulières.Cette thèse a donc pour but de développer et de valider une nouvelle méthodologie numérique, basée sur le mésomodèle, pour la modélisation des structures composites stratifiées en présence de gradients de contraintes. Cette méthode est une combinaison entre approches continue et discrète afin de décrire respectivement les fissures quasi-périodiques et isolées liées aux gradients de contraintes au sein de pièces composites. La validation, basée sur la comparaison des prédictions du modèle avec les données expérimentales, montre une remarquable fidélité des résultats numériques, que ce soit en termes d’évolution des mécanismes de dégradation mais aussi de prédiction de la contrainte à rupture.On s’intéresse dans ce travail aux concentrations générées par des découpes typiques de l’industrie : trou et entaille. Ces dernières sont les lieux privilégiés conduisant à la perte de l’intégrité des structures composites à cause de la rupture des fibres ou du délaminage important. De plus, les analyses numériques se concentrent sur les effets d’échelle, d’épaisseur du pli et de séquences d’empilement, puisqu’ils sont cruciaux pour le dimensionnement de pièces composites de grandes dimensions.Cette thèse s’inscrit dans le cadre d’une collaboration avec SAMTECH (SIEMENS) pour améliorer la pertinence du mésomodèle déjà implémenté dans les modules de calculs de SAMCEF. Les développements issus de ces travaux sont en cours de portage dans la version commerciale de SAMCEF.

The industry is increasingly using composite materials, particularly in key areas such as aircraft and space construction, automotive and wind power. In order to meet mass (and therefore fuel) reduction requirements while respecting mechanical strength constraints, fine numerical modeling of the behavior of composite materials becomes crucial for the design and dimensioning of structures as well as the reduction of costs associated with testing.The "mesomodel" developed at LMT-Cachan over the past thirty years is a multiscale model of…

Advisors/Committee Members: Néron, David (thesis director), Ladevèze, Pierre (thesis director).

Subjects/Keywords: Modélisation des splits; Mésomodèle; Composites stratifiés; Multiéchelle; Singularités; Virtual Testing; Mesomodel; Laminated composites; Virtual Testing; Singularities; Multiscale; Split modeling

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Le, M. Q. (2020). Modélisation et simulations des singularités dans les composites stratifiés. : Modeling and simulations of singularities in laminated composites. (Doctoral Dissertation). université Paris-Saclay. Retrieved from http://www.theses.fr/2020UPASN005

Chicago Manual of Style (16^th Edition):

Le, Minh Quan. “Modélisation et simulations des singularités dans les composites stratifiés. : Modeling and simulations of singularities in laminated composites.” 2020. Doctoral Dissertation, université Paris-Saclay. Accessed March 08, 2021. http://www.theses.fr/2020UPASN005.

MLA Handbook (7^th Edition):

Le, Minh Quan. “Modélisation et simulations des singularités dans les composites stratifiés. : Modeling and simulations of singularities in laminated composites.” 2020. Web. 08 Mar 2021.

Vancouver:

Le MQ. Modélisation et simulations des singularités dans les composites stratifiés. : Modeling and simulations of singularities in laminated composites. [Internet] [Doctoral dissertation]. université Paris-Saclay; 2020. [cited 2021 Mar 08]. Available from: http://www.theses.fr/2020UPASN005.

Council of Science Editors:

Le MQ. Modélisation et simulations des singularités dans les composites stratifiés. : Modeling and simulations of singularities in laminated composites. [Doctoral Dissertation]. université Paris-Saclay; 2020. Available from: http://www.theses.fr/2020UPASN005

University of Wisconsin – Milwaukee

13. Shams, Seyedmohammadsadegh. Experimental, Analytical and Numerical Characterization of Effects of Fiber Waviness Defects in Laminated Composites.

Degree: PhD, Engineering, 2016, University of Wisconsin – Milwaukee

URL: https://dc.uwm.edu/etd/1308

► Fiber waviness is one of the most common defects observed in reinforced laminated composites which can occur during manufacturing. The effects of waviness on… (more)

▼ Fiber waviness is one of the most common defects observed in reinforced laminated composites which can occur during manufacturing. The effects of waviness on the mechanical responses of laminated composites under the standard mechanical testing are investigated with proposed experiments, analytical and numerical approaches. The damage consequences including kink band formation, crack onset, delamination and fiber fractures are characterized by means of full field digital imaging and acoustic emission techniques. The notch and waviness size effects on the notched composite compressive and tensile strength are studied using a progressive damage approach using the finite element method. A numerical approach based on a combined continuum damage analysis and cohesive zone interlaminar behavior is proposed to simulate the failure initiation and propagation responses. The proposed FE modeling approach will attempt to predict the response of the laminate structure inferring distinctive failure mechanisms and their interactions with the defects. Hybrid near infrared hyperspectral imaging surfaces with a bottom-up design discretization approach have been developed to build the finite element model. The proposed method overcomes the limitations of current wrinkle assessment methods by connecting the high sensitivity near infrared hyperspectral measurements to direct structural models. Temporal evaluations of the load-deformation response, acoustic emissions, and optical microscopy are used to study and verify the failure modes and damage progression models in the tension and compression specimens. An analytical model based on the orthotropic stress concentration factor and a generalized expression using traction continuity through the kink band is developed to predict failure strength of the Open Hole Compression (OHC) specimens. In this thesis, a new methodology to determine the limit point is also proposed based on the out-of-plane displacement tracking using an image correlation method. The method can be used to determine the start of incipient interlaminar delamination in continuous fiber reinforced composite materials. Advisors/Committee Members: Rani Elhajjar.

Subjects/Keywords: Defects in Composites; Digital Image Correlation Technique; Fracture Mechanics; Laminated Composites; Near Infrared Hyperspectral Imaging; Progressive Modeling; Engineering

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Shams, S. (2016). Experimental, Analytical and Numerical Characterization of Effects of Fiber Waviness Defects in Laminated Composites. (Doctoral Dissertation). University of Wisconsin – Milwaukee. Retrieved from https://dc.uwm.edu/etd/1308

Chicago Manual of Style (16^th Edition):

Shams, Seyedmohammadsadegh. “Experimental, Analytical and Numerical Characterization of Effects of Fiber Waviness Defects in Laminated Composites.” 2016. Doctoral Dissertation, University of Wisconsin – Milwaukee. Accessed March 08, 2021. https://dc.uwm.edu/etd/1308.

MLA Handbook (7^th Edition):

Shams, Seyedmohammadsadegh. “Experimental, Analytical and Numerical Characterization of Effects of Fiber Waviness Defects in Laminated Composites.” 2016. Web. 08 Mar 2021.

Vancouver:

Shams S. Experimental, Analytical and Numerical Characterization of Effects of Fiber Waviness Defects in Laminated Composites. [Internet] [Doctoral dissertation]. University of Wisconsin – Milwaukee; 2016. [cited 2021 Mar 08]. Available from: https://dc.uwm.edu/etd/1308.

Council of Science Editors:

Shams S. Experimental, Analytical and Numerical Characterization of Effects of Fiber Waviness Defects in Laminated Composites. [Doctoral Dissertation]. University of Wisconsin – Milwaukee; 2016. Available from: https://dc.uwm.edu/etd/1308

University of Manchester

14. Mahmood, Ali Hasan. Optimising The Lamination Properties Of Textile Composites.

Degree: 2011, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:142035

► Woven glass composites have been used for many years in commercial applications due to their light weight, competitive price and good engineering properties. Absorption of… (more)

▼ Woven glass composites have been used for many years in commercial applications due to their light weight, competitive price and good engineering properties. Absorption of energy by laminated composite material results in damage in various forms, the most common of which is delamination. Inter-laminar fracture causes the layers of composite to separate, resulting in a reduction in stiffness and strength of the composite structure, matrix cracking and in some cases fibre breakage takes place. The aim of this project was to improve the inter-laminar bond strength between woven glass fabric and resin. Air jet texturing was selected to provide a small amount of bulk to the glass yarn. The purpose was to provide more surface contact between the fibres and resin and also to increase the adhesion between the neighbouring layers. These were expected to enhance the resistance to delamination in the woven glass composites.Glass yarns were textured by a Stähle air jet texturing machine. Core-and-effect yarn was produced instead of a simple air textured yarn. Hand loom and vacuum bagging techniques were used for making the fabric and composite panels from both textured and non-textured yarns. Density and fibre volume content were established for physical characterisation. Breaking strength (tenacity) of the yarns and tensile, flexure, inter-laminar shear strength (ILSS) and fracture toughness (mode 1) properties of the composites were determined. Projection microscopy and SEM imaging techniques were used to assess the fractured surfaces of the composite specimens. The yarn tenacity and the tensile properties of the composites were significantly reduced after the texturing process, whereas flexure properties were unchanged. However, significant improvement was observed in the ILSS and fracture toughness of the composites after the texturing process. It was also observed that the composites made from the fabrics with textured yarns in only the weft direction are the most advantageous as they maintained the tensile and flexure properties but have significantly higher inter-laminar shear strength. Advisors/Committee Members: Gong, Hugh.

Subjects/Keywords: Air-jet Texturing of glass yarns; core-and-effect glass yarns; Delamination; Laminated composites; Mechanical properties of glass composites

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Mahmood, A. H. (2011). Optimising The Lamination Properties Of Textile Composites. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:142035

Chicago Manual of Style (16^th Edition):

Mahmood, Ali Hasan. “Optimising The Lamination Properties Of Textile Composites.” 2011. Doctoral Dissertation, University of Manchester. Accessed March 08, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:142035.

MLA Handbook (7^th Edition):

Mahmood, Ali Hasan. “Optimising The Lamination Properties Of Textile Composites.” 2011. Web. 08 Mar 2021.

Vancouver:

Mahmood AH. Optimising The Lamination Properties Of Textile Composites. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2021 Mar 08]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:142035.

Council of Science Editors:

Mahmood AH. Optimising The Lamination Properties Of Textile Composites. [Doctoral Dissertation]. University of Manchester; 2011. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:142035

University of Manchester

15. Mahmood, Ali Hasan. Optimising the lamination properties of textile composites.

Degree: PhD, 2011, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/optimising-the-lamination-properties-of-textile-composites(6a215f92-e200-4e30-8b72-7f599a5e95f3).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549015

► Woven glass composites have been used for many years in commercial applications due to their light weight, competitive price and good engineering properties. Absorption of… (more)

▼ Woven glass composites have been used for many years in commercial applications due to their light weight, competitive price and good engineering properties. Absorption of energy by laminated composite material results in damage in various forms, the most common of which is delamination. Inter-laminar fracture causes the layers of composite to separate, resulting in a reduction in stiffness and strength of the composite structure, matrix cracking and in some cases fibre breakage takes place. The aim of this project was to improve the inter-laminar bond strength between woven glass fabric and resin. Air jet texturing was selected to provide a small amount of bulk to the glass yarn. The purpose was to provide more surface contact between the fibres and resin and also to increase the adhesion between the neighbouring layers. These were expected to enhance the resistance to delamination in the woven glass composites.Glass yarns were textured by a Stähle air jet texturing machine. Core-and-effect yarn was produced instead of a simple air textured yarn. Hand loom and vacuum bagging techniques were used for making the fabric and composite panels from both textured and non-textured yarns. Density and fibre volume content were established for physical characterisation. Breaking strength (tenacity) of the yarns and tensile, flexure, inter-laminar shear strength (ILSS) and fracture toughness (mode 1) properties of the composites were determined. Projection microscopy and SEM imaging techniques were used to assess the fractured surfaces of the composite specimens. The yarn tenacity and the tensile properties of the composites were significantly reduced after the texturing process, whereas flexure properties were unchanged. However, significant improvement was observed in the ILSS and fracture toughness of the composites after the texturing process. It was also observed that the composites made from the fabrics with textured yarns in only the weft direction are the most advantageous as they maintained the tensile and flexure properties but have significantly higher inter-laminar shear strength.

Subjects/Keywords: 677; Air-jet Texturing of glass yarns; core-and-effect glass yarns; Delamination; Laminated composites; Mechanical properties of glass composites

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Mahmood, A. H. (2011). Optimising the lamination properties of textile composites. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/optimising-the-lamination-properties-of-textile-composites(6a215f92-e200-4e30-8b72-7f599a5e95f3).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549015

Chicago Manual of Style (16^th Edition):

Mahmood, Ali Hasan. “Optimising the lamination properties of textile composites.” 2011. Doctoral Dissertation, University of Manchester. Accessed March 08, 2021. https://www.research.manchester.ac.uk/portal/en/theses/optimising-the-lamination-properties-of-textile-composites(6a215f92-e200-4e30-8b72-7f599a5e95f3).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549015.

MLA Handbook (7^th Edition):

Mahmood, Ali Hasan. “Optimising the lamination properties of textile composites.” 2011. Web. 08 Mar 2021.

Vancouver:

Mahmood AH. Optimising the lamination properties of textile composites. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2021 Mar 08]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/optimising-the-lamination-properties-of-textile-composites(6a215f92-e200-4e30-8b72-7f599a5e95f3).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549015.

Council of Science Editors:

Mahmood AH. Optimising the lamination properties of textile composites. [Doctoral Dissertation]. University of Manchester; 2011. Available from: https://www.research.manchester.ac.uk/portal/en/theses/optimising-the-lamination-properties-of-textile-composites(6a215f92-e200-4e30-8b72-7f599a5e95f3).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549015

University of Windsor

16. Honickman, Hart Noah. Development of hybrid composite co-pultruded structural members.

Degree: PhD, Mechanical, Automotive, and Materials Engineering, 2014, University of Windsor

URL: http://scholar.uwindsor.ca/etd/5018

► Fibre reinforced polymer (FRP) materials offer many advantages over conventional metallic structural materials due to their high specific strength and stiffness, long fatigue life,… (more)

▼ Fibre reinforced polymer (FRP) materials offer many advantages over conventional metallic structural materials due to their high specific strength and stiffness, long fatigue life, and resistance to environmental corrosion. However, these materials present some unique engineering challenges due to their anisotropy and heterogeneity. The connection of these composite parts to adjacent components often results in complex and counter-intuitive states of stress that can be quite difficult to model. Furthermore, since these materials are, in a sense, synthesized during the fabrication of the final part, the mechanical properties that can be expected from FRP structures are largely dependent upon highly skilled workmanship. Pultrusion is a manufacturing technique that is intended for the mass-production of long FRP parts having continuous cross-sectional geometry. Although it has not yet been optimized for the aerospace industry, with some qualification research, pultrusion may prove to offer many benefits over conventional methods of manufacturing composite aircraft parts. The present dissertation investigates the possibility of co-pultruding FRP parts with embedded non-FRP materials (such as metallic materials), which could serve as integral hard points to facilitate serviceable mechanical connections to adjacent parts. It is shown that these hybrid co-pultruded members offer substantial light-weighting benefits over conventional metallic components, while retaining the ability to employ serviceable mechanical fasteners. Simple unidimensional beam models are of great value when validating the results of complex finite element analyses of aircraft wing-stringers, or other similar structural members. It is demonstrated in the present dissertation that classical unidimensional beam-type analytical models often yield unconservative predictions (over-predictions) of stiffness and elastic stability when used for the analyses of FRP beams and columns. In fact, specific examples are included in which classical methods are shown to over-predict torsional stiffness by 111.3%, over-predict warping stiffness by 40.3%, and over-predict critical column buckling loads by 103.63%. As such, this dissertation presents additional analytical procedures that enhance the fidelity of these classical analytical methods such that they can be utilized to accurately assess the stiffness and elastic stability of FRP beams and columns, including the hybrid composite co-pultruded members that are proposed in this dissertation. Advisors/Committee Members: Johrendt, Jennifer L., Frise, Peter R..

Subjects/Keywords: Applied sciences; Fiber-reinforced polymers; Buckling; Laminated composites; Pultrusion; Stringers; Torsion; Engineering; Mechanical Engineering

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Honickman, H. N. (2014). Development of hybrid composite co-pultruded structural members. (Doctoral Dissertation). University of Windsor. Retrieved from http://scholar.uwindsor.ca/etd/5018

Chicago Manual of Style (16^th Edition):

Honickman, Hart Noah. “Development of hybrid composite co-pultruded structural members.” 2014. Doctoral Dissertation, University of Windsor. Accessed March 08, 2021. http://scholar.uwindsor.ca/etd/5018.

MLA Handbook (7^th Edition):

Honickman, Hart Noah. “Development of hybrid composite co-pultruded structural members.” 2014. Web. 08 Mar 2021.

Vancouver:

Honickman HN. Development of hybrid composite co-pultruded structural members. [Internet] [Doctoral dissertation]. University of Windsor; 2014. [cited 2021 Mar 08]. Available from: http://scholar.uwindsor.ca/etd/5018.

Council of Science Editors:

Honickman HN. Development of hybrid composite co-pultruded structural members. [Doctoral Dissertation]. University of Windsor; 2014. Available from: http://scholar.uwindsor.ca/etd/5018

University of Michigan

17. Xie, Jiawen. Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading.

Degree: PhD, Aerospace Engineering, 2016, University of Michigan

URL: http://hdl.handle.net/2027.42/135917

► Delamination is a common failure mode in composite (fiber reinforced and layered) structures subject to low-velocity impacts by foreign objects. To maximize the design capacity,… (more)

▼ Delamination is a common failure mode in composite (fiber reinforced and layered) structures subject to low-velocity impacts by foreign objects. To maximize the design capacity, it is important to have reliable tools to predict delamination evolution in laminated composites. The focus of this research is to analyze flexural responses and delamination evolution in laminated composites subject to flexural loading. Analytical solutions were derived from linear elasticity theory and structural mechanics of beam and plate configurations. Formulations and evaluations of the proposed analytical approaches were validated by comparing with results of finite element (FE) simulations in similar settings and published experiment data. Two-dimensional (2D) elasticity theory for laminated panels was extended to analyze elastodynamic responses of pristine panels and quasi-static responses of pre-delaminated panels. A highlight of the approach is exact solutions of displacement and stress fields it provides. Further investigations showed that the 2D elasticity theory is not amenable to a closed-form solution for laminates containing off-axis angle plies due to three-dimensional (3D) states of stress. Closed-form solutions of cohesive zone modeling (CZM) were developed for popular delamination toughness tests of laminated beams. A laminate was modeled as an assembly of two sub-laminates connected by a virtual deformable layer with infinitesimal thickness. Comprehensive parametric studies were performed, offering a deeper understanding of CZM. The studies were further simplified so that closed-form expressions can be obtained, serving as a quick estimation of the flexural responses and the process zone lengths. Analytical CZM solutions were extended analyze quasi-static impact tests of laminated composite plates with arbitrary stacking sequences, aiming to predict critical load, critical interfaces and extent of delamination at that interface. The Rayleigh-Ritz method was used to determine approximate solutions. The predicted results were found in good agreement with FE simulations. Advisors/Committee Members: Sundararaghavan, Veera (committee member), Waas, Anthony M (committee member), Garikipati, Krishnakumar R (committee member), Goulbourne, Nakhiah C (committee member), Rassaian, Mostafa (committee member).

Subjects/Keywords: delamination; laminated composites; cohesive zone modeling; analytical solutions; Aerospace Engineering; Mechanical Engineering; Engineering

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Xie, J. (2016). Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/135917

Chicago Manual of Style (16^th Edition):

Xie, Jiawen. “Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading.” 2016. Doctoral Dissertation, University of Michigan. Accessed March 08, 2021. http://hdl.handle.net/2027.42/135917.

MLA Handbook (7^th Edition):

Xie, Jiawen. “Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading.” 2016. Web. 08 Mar 2021.

Vancouver:

Xie J. Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading. [Internet] [Doctoral dissertation]. University of Michigan; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2027.42/135917.

Council of Science Editors:

Xie J. Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading. [Doctoral Dissertation]. University of Michigan; 2016. Available from: http://hdl.handle.net/2027.42/135917

University of Michigan

18. Xie, Jiawen. Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading.

Degree: PhD, Aerospace Engineering, 2016, University of Michigan

URL: http://hdl.handle.net/2027.42/136958

► Delamination is a common failure mode in composite (fiber reinforced and layered) structures subject to low-velocity impacts by foreign objects. To maximize the design capacity,… (more)

▼ Delamination is a common failure mode in composite (fiber reinforced and layered) structures subject to low-velocity impacts by foreign objects. To maximize the design capacity, it is important to have reliable tools to predict delamination evolution in laminated composites. The focus of this research is to analyze flexural responses and delamination evolution in laminated composites subject to flexural loading. Analytical solutions were derived from linear elasticity theory and structural mechanics of beam and plate configurations. Formulations and evaluations of the proposed analytical approaches were validated by comparing with results of finite element (FE) simulations in similar settings and published experiment data. Two-dimensional (2D) elasticity theory for laminated panels was extended to analyze elastodynamic responses of pristine panels and quasi-static responses of pre-delaminated panels. A highlight of the approach is exact solutions of displacement and stress fields it provides. Further investigations showed that the 2D elasticity theory is not amenable to a closed-form solution for laminates containing off-axis angle plies due to three-dimensional (3D) states of stress. Closed-form solutions of cohesive zone modeling (CZM) were developed for popular delamination toughness tests of laminated beams. A laminate was modeled as an assembly of two sub-laminates connected by a virtual deformable layer with infinitesimal thickness. Comprehensive parametric studies were performed, offering a deeper understanding of CZM. The studies were further simplified so that closed-form expressions can be obtained, serving as a quick estimation of the flexural responses and the process zone lengths. Analytical CZM solutions were extended analyze quasi-static impact tests of laminated composite plates with arbitrary stacking sequences, aiming to predict critical load, critical interfaces and extent of delamination at that interface. The Rayleigh-Ritz method was used to determine approximate solutions. The predicted results were found in good agreement with FE simulations. Advisors/Committee Members: Sundararaghavan, Veera (committee member), Waas, Anthony M (committee member), Garikipati, Krishnakumar R (committee member), Goulbourne, Nakhiah C (committee member), Rassaian, Mostafa (committee member).

Subjects/Keywords: delamination; laminated composites; cohesive zone modeling; analytical solutions; Aerospace Engineering; Mechanical Engineering; Engineering

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Xie, J. (2016). Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/136958

Chicago Manual of Style (16^th Edition):

Xie, Jiawen. “Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading.” 2016. Doctoral Dissertation, University of Michigan. Accessed March 08, 2021. http://hdl.handle.net/2027.42/136958.

MLA Handbook (7^th Edition):

Xie, Jiawen. “Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading.” 2016. Web. 08 Mar 2021.

Vancouver:

Xie J. Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading. [Internet] [Doctoral dissertation]. University of Michigan; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2027.42/136958.

Council of Science Editors:

Xie J. Analytical and Numerical Modeling of Delamination Evolution in Fiber Reinforced Laminated Composites Subject to Flexural Loading. [Doctoral Dissertation]. University of Michigan; 2016. Available from: http://hdl.handle.net/2027.42/136958

Texas A&M University

19. Ganpatye, Atul Shridatta. Ultrasonic ply-by-ply detection of matrix cracks in laminated composites.

Degree: MS, Aerospace Engineering, 2005, Texas A&M University

URL: http://hdl.handle.net/1969.1/1327

► In the design of cryogenic fuel tanks for the next generation Reusable Launch Vehicles (RLVs), the permeability of liquid hydrogen (LH2) across the thickness of… (more)

Subjects/Keywords: Ultrasonics; Nondestructive Evaluation; Laminated Composites; Cracks

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Ganpatye, A. S. (2005). Ultrasonic ply-by-ply detection of matrix cracks in laminated composites. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/1327

Chicago Manual of Style (16^th Edition):

Ganpatye, Atul Shridatta. “Ultrasonic ply-by-ply detection of matrix cracks in laminated composites.” 2005. Masters Thesis, Texas A&M University. Accessed March 08, 2021. http://hdl.handle.net/1969.1/1327.

MLA Handbook (7^th Edition):

Ganpatye, Atul Shridatta. “Ultrasonic ply-by-ply detection of matrix cracks in laminated composites.” 2005. Web. 08 Mar 2021.

Vancouver:

Ganpatye AS. Ultrasonic ply-by-ply detection of matrix cracks in laminated composites. [Internet] [Masters thesis]. Texas A&M University; 2005. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1969.1/1327.

Council of Science Editors:

Ganpatye AS. Ultrasonic ply-by-ply detection of matrix cracks in laminated composites. [Masters Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/1327

Florida Atlantic University

20. Saenz, Elio. Fatigue and fracture of foam cores used in sandwich composites.

Degree: M.S.C.S., 2012, Florida Atlantic University

URL: http://purl.flvc.org/FAU/3352829

►

Summary: This study focused on the fracture and fatigue crack growth behavior in polyvinylchloride (PVC) and polyethersulfone (PES) foams. A new sandwich double cantilever beam… (more)

Subjects/Keywords: Sandwich construction; Composite materials; Fibrous composites; Strains and stresses – Management; Laminated materials; Plastics – Fatigue

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Saenz, E. (2012). Fatigue and fracture of foam cores used in sandwich composites. (Masters Thesis). Florida Atlantic University. Retrieved from http://purl.flvc.org/FAU/3352829

Chicago Manual of Style (16^th Edition):

Saenz, Elio. “Fatigue and fracture of foam cores used in sandwich composites.” 2012. Masters Thesis, Florida Atlantic University. Accessed March 08, 2021. http://purl.flvc.org/FAU/3352829.

MLA Handbook (7^th Edition):

Saenz, Elio. “Fatigue and fracture of foam cores used in sandwich composites.” 2012. Web. 08 Mar 2021.

Vancouver:

Saenz E. Fatigue and fracture of foam cores used in sandwich composites. [Internet] [Masters thesis]. Florida Atlantic University; 2012. [cited 2021 Mar 08]. Available from: http://purl.flvc.org/FAU/3352829.

Council of Science Editors:

Saenz E. Fatigue and fracture of foam cores used in sandwich composites. [Masters Thesis]. Florida Atlantic University; 2012. Available from: http://purl.flvc.org/FAU/3352829

University of British Columbia

21. Wood, Geoffrey Michael. Treatment of polyethylene fibre for improved fibre to resin adhesion in composite applications.

Degree: Master of Applied Science - MASc, Materials Engineering, 1988, University of British Columbia

URL: http://hdl.handle.net/2429/28528

► Tensile properties of polyethylene fibres are shown to be very good in comparison to properties of other advanced composite reinforcing fibres. Nevertheless, the use of… (more)

▼ Tensile properties of polyethylene fibres are shown to be very good in comparison to properties of other advanced composite reinforcing fibres. Nevertheless, the use of polyethylene fibres in polymeric matrix composites suffers due to a poor fibre to resin adhesion. However, its ballistic properties are excellent because of the poor adhesion and also fibre ductility. Applications involving structural use of polyethylene fibres are limited by, among others, the low compressive and shear strengths. These are affected strongly by the degree of adhesion. Improvements in bonding are expected to result in greater commercial appeal for the fibres as the property limitations are reduced. Ultra Violet radiation has been shown previously, in laboratory scale batch studies, to induce graft co-polymerization of monomers to polyethylene films. Improvements in wettability and adhesion result when the grafted polymer is compatible to the bonding medium. In this study the technique was adapted to bench scale, continuous fibre treatment, whereby the monomer was surface grafted to the polyethylene substrate. Acrylic acid monomer was used for this due to its relative safety, small molecular size, and high reactivity. Reaction initiation was provided by use of a benzophenone photosensitizer due to the stability of polyethylene to UV radiation. The reaction was performed by pre-coating the fibres with reactants, then exposure to UV radiation. Results of the continuous process for fibre treatment indicate that the monomer concentration and temperature of the preliminary soakings are key variables. Adhesion improvement was measured by single fibre pullout tests and interlaminar shear strength (ILSS) tests. Of these, the ILSS appeared to be more sensitive for judging small improvements. Tensile tests were used to judge property deterioration due to treatment, and flexural property tests gave a preliminary indication of material behavior. The ILSS showed marked improvement from 1.5 ksi for untreated material to over 5.2 ksi for the better treatments. A competing treatment, plasma, shows ILSS values around 3 ksi. The flexural test indicated that failure of UV-grafted polyethylene was in tension, whereas failure of plasma and untreated material was in compression. The study has proven successful in improving the adhesion of polyethylene fibres to an epoxy resin matrix. Commercial viability is currently being developed through decreased process residence times and irradiation exposures.

Subjects/Keywords: Composite materials; Fibrous composites; Laminated materials

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Wood, G. M. (1988). Treatment of polyethylene fibre for improved fibre to resin adhesion in composite applications. (Masters Thesis). University of British Columbia. Retrieved from http://hdl.handle.net/2429/28528

Chicago Manual of Style (16^th Edition):

Wood, Geoffrey Michael. “Treatment of polyethylene fibre for improved fibre to resin adhesion in composite applications.” 1988. Masters Thesis, University of British Columbia. Accessed March 08, 2021. http://hdl.handle.net/2429/28528.

MLA Handbook (7^th Edition):

Wood, Geoffrey Michael. “Treatment of polyethylene fibre for improved fibre to resin adhesion in composite applications.” 1988. Web. 08 Mar 2021.

Vancouver:

Wood GM. Treatment of polyethylene fibre for improved fibre to resin adhesion in composite applications. [Internet] [Masters thesis]. University of British Columbia; 1988. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2429/28528.

Council of Science Editors:

Wood GM. Treatment of polyethylene fibre for improved fibre to resin adhesion in composite applications. [Masters Thesis]. University of British Columbia; 1988. Available from: http://hdl.handle.net/2429/28528

Michigan State University

22. Hou, Fang. Investigation of translaminar fracture in fibrereinforced composite laminates – applicability of linear elastic fracture mechanics and cohesive-zone model.

Degree: 2014, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:2352

►

Thesis Ph. D. Michigan State University. Engineering Mechanics 2014.

With the extensive application of fiber-reinforced composite laminates in industry, research on the fracture mechanisms of… (more)

▼

Thesis Ph. D. Michigan State University. Engineering Mechanics 2014.

With the extensive application of fiber-reinforced composite laminates in industry, research on the fracture mechanisms of this type of materials have drawn more and more attentions. A variety of fracture theories and models have been developed. Among them, the linear elastic fracture mechanics (LEFM) and cohesive-zone model (CZM) are two widely-accepted fracture models, which have already shown applicability in the fracture analysis of fiber-reinforced composite laminates. However, there remain challenges which prevent further applications of the two fracture models, such as the experimental measurement of fracture resistance. This dissertation primarily focused on the study of the applicability of LEFM and CZM for the fracture analysis of translaminar fracture in fibre-reinforced composite laminates. The research for each fracture model consisted of two sections: the analytical characterization of crack-tip fields and the experimental measurement of fracture resistance parameters. In the study of LEFM, an experimental investigation based on full-field crack-tip displacement measurements was carried out as a way to characterize the subcritical and steady-state crack advances in translaminar fracture of fiber-reinforced composite laminates. Here, the fiber-reinforced composite laminates were approximated as anisotropic solids. The experimental investigation relied on the LEFM theory with a modification with respect to the material anisotropy. Firstly, the full-field crack-tip displacement fields were measured by Digital Image Correlation (DIC). Then two methods, separately based on the stress intensity approach and the energy approach, were developed to measure the crack-tip field parameters from crack-tip displacement fields. The studied crack-tip field parameters included the stress intensity factor, energy release rate and effective crack length. Moreover, the crack-growth resistance curves (R-curves) were constructed with the measured crack-tip field parameters. In addition, an error analysis was carried out with an emphasis on the influence of out-of-plane rotation of specimen. In the study of CZM, two analytical inverse methods, namely the field projection method (FPM) and the separable nonlinear least-squares method, were developed for the extraction of cohesive fracture properties from crack-tip full-field displacements. Firstly, analytical characterizations of the elastic fields around a crack-tip cohesive zone and the cohesive variables within the cohesive zone were derived in terms of an eigenfunction expansion. Then both of the inverse methods were developed based on the analytical characterization. With the analytical inverse methods, the cohesive-zone law (CZL), cohesive-zone size and position can be inversely computed from the cohesive-crack-tip displacement fields. In the study, comprehensive numerical tests were carried out to investigate the applicability and robustness of two inverse methods. From the numerical tests, it was…

Advisors/Committee Members: Xiao, Xinran, Liu, Dahsin, Tekalur, Arjun, Soroushian, Parviz.

Subjects/Keywords: Digital image correlation; Laminated materials; Fibrous composites; Fracture mechanics; Structural analysis (Engineering); Mechanical engineering

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Hou, F. (2014). Investigation of translaminar fracture in fibrereinforced composite laminates – applicability of linear elastic fracture mechanics and cohesive-zone model. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:2352

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):

Hou, Fang. “Investigation of translaminar fracture in fibrereinforced composite laminates – applicability of linear elastic fracture mechanics and cohesive-zone model.” 2014. Thesis, Michigan State University. Accessed March 08, 2021. http://etd.lib.msu.edu/islandora/object/etd:2352.

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

MLA Handbook (7^th Edition):

Hou, Fang. “Investigation of translaminar fracture in fibrereinforced composite laminates – applicability of linear elastic fracture mechanics and cohesive-zone model.” 2014. Web. 08 Mar 2021.

Vancouver:

Hou F. Investigation of translaminar fracture in fibrereinforced composite laminates – applicability of linear elastic fracture mechanics and cohesive-zone model. [Internet] [Thesis]. Michigan State University; 2014. [cited 2021 Mar 08]. Available from: http://etd.lib.msu.edu/islandora/object/etd:2352.

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

Council of Science Editors:

Hou F. Investigation of translaminar fracture in fibrereinforced composite laminates – applicability of linear elastic fracture mechanics and cohesive-zone model. [Thesis]. Michigan State University; 2014. Available from: http://etd.lib.msu.edu/islandora/object/etd:2352

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

Drexel University

23. Yan, Chang (Karen). On homogenization and de-homogenization of composite materials.

Degree: 2003, Drexel University

URL: http://hdl.handle.net/1860/246

►

Composite homogenization is a modeling concept that allows the description of heterogeneous materials by constitutively equivalent, homogeneous ones. The concept is universally applied to fibrous… (more)

▼

Composite homogenization is a modeling concept that allows the description of heterogeneous materials by constitutively equivalent, homogeneous ones. The concept is universally applied to fibrous composites, resulting in many modeling approaches. But, by homogenization, the composite is voided of its physical microstructure; elements that may affect failure mechanisms physically are also voided. This fact often leads to difficulties in failure theories formulated at the homogenized material scale. De-homogenization is a reverse scheme in that the microstructure is restored, albeit locally, back in the homogenized composite. Clearly, this is done after composite homogenization and field analysis of composite structures under global loading; so the micro fields in the desired locations with restored microstructure can be recovered. The recovered micro fields may then provide the needed information for some failure theories to be formulated at the composite micro scale instead. This thesis presents a unified modeling approach for homogenization (forward) and de-homogenization (backward), applicable to unidirectional composite systems. Emphasis is placed on the uniqueness between the forward and the backward modeling processes; so the desired micro fields are truly recovered within the confines of mechanics. Micro fields in several laminates made of the UD systems are recovered; key effects that influence failure mechanisms therein are studied. An inter-scale failure theory that describes matrix cracking in laminates is then formulated, being based on the recovered micro-fields. Laminate matrix cracking in several well-documented experimental studies are simulated using the inter-scale theory. The simulation captures the major cracking characteristics that are otherwise excluded in failure theories derived at the homogenized composite scale. The general concept of homogenization/de-homogenization is applicable to all composite systems, where responses from micro-macro-global interactions are to be physically described. The approach taken in the formulation of the inter-scale theory serves as an example of both conceptual and practical importance.

Ph.D., Mechanical Engineering – Drexel University, 2003

Advisors/Committee Members: Wang, Albert S. D..

Subjects/Keywords: Fibrous composites; Composite materials; Laminated materials

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Yan, C. (. (2003). On homogenization and de-homogenization of composite materials. (Thesis). Drexel University. Retrieved from http://hdl.handle.net/1860/246

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):

Yan, Chang (Karen). “On homogenization and de-homogenization of composite materials.” 2003. Thesis, Drexel University. Accessed March 08, 2021. http://hdl.handle.net/1860/246.

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

MLA Handbook (7^th Edition):

Yan, Chang (Karen). “On homogenization and de-homogenization of composite materials.” 2003. Web. 08 Mar 2021.

Vancouver:

Yan C(. On homogenization and de-homogenization of composite materials. [Internet] [Thesis]. Drexel University; 2003. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1860/246.

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

Council of Science Editors:

Yan C(. On homogenization and de-homogenization of composite materials. [Thesis]. Drexel University; 2003. Available from: http://hdl.handle.net/1860/246

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

Indian Institute of Science

24. Gupta, Manish Chandra. Investigation On Flexural Vibrations Of Bolted Laminates.

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

URL: http://etd.iisc.ac.in/handle/2005/2086

► Bolted cores made of coated silicon steel sheets constitute a vital part of heavy electrical equipment for transformers, motors and turbogenerators. Bolted laminates are eminently… (more)

▼ Bolted cores made of coated silicon steel sheets constitute a vital part of heavy electrical equipment for transformers, motors and turbogenerators. Bolted laminates are eminently suitable for facilitating smooth magnetic flux paths, but, unfortunately, they are unable to suppress interlaminate shearing caused by flexural vibration generating noise levels often exceeding 100 dB during operation. The resulting din and cacophony in the surrounding has become a major environmental concern. This thesis makes an attempt to develop theoretical, experimental and numerical models for evolving an effective stiffness approach enhancing the design and analysis underlying nonlinear flexure of bolted laminates. While large machine cores contain thousands of thin sheets bolted together along with end plates, this thesis reports the results obtained on two different assemblies. Two 375 mm long 60 mm wide and 10 mm thick plates assembled with 3, 4 or 5 bolts constitute the first configuration. The second one which is much more realistic comprises 80 coated 270 micron silicon steel sheets with end plates of 2 or 4 mm thickness held together by 3 or 5 bolts. Static 3 point bend tests on these bolted assemblies are followed by instrumented impact tests. Static bending tests highlight the role of frictional nonlinearity inducing a drop in the stiffness due to sliding between the plates. An experimentally determined effective modulus in the initial linear range is utilized for static and dynamic finite element simulations. Nonlinear response of bolted plates is simulated using contact elements in between the sliding plates, plates and the bolts heads. Since the first fundamental mode of vibration dominates the tribomechanical vibration induced noise, the primary focus is on the fundamental frequency in bending. There is generally a good overall agreement in all the results obtained through theory, experiment and FE simulation. Experiments, however, unveil quite complex nonlinear effects induced by friction and plasticity outside the scope of this thesis. However, the low amplitude response of bolted laminates which is reasonably well captured in this thesis represents the starting point for initiating a more elaborate effort for addressing large amplitude nonlinear flexure in bolted laminates. These findings shed light on estimating and controlling noise and vibration levels in heavy electric machines. Advisors/Committee Members: Simha, K R Y (advisor).

Subjects/Keywords: Bolted Laminates - Vibrations; Coated Silicon Steel Sheets; Bolted Laminates - Nonlinear Flexure; Bolted Cores; Laminated Stack - Analysis; Laminated Plates - Analysis; Bolted Stack Analysis; Laminated Cores; Laminate Composites; Laminated Stacks; Laminated Stack Assembly; Applied Mechanics

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Gupta, M. C. (2013). Investigation On Flexural Vibrations Of Bolted Laminates. (Masters Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2086

Chicago Manual of Style (16^th Edition):

Gupta, Manish Chandra. “Investigation On Flexural Vibrations Of Bolted Laminates.” 2013. Masters Thesis, Indian Institute of Science. Accessed March 08, 2021. http://etd.iisc.ac.in/handle/2005/2086.

MLA Handbook (7^th Edition):

Gupta, Manish Chandra. “Investigation On Flexural Vibrations Of Bolted Laminates.” 2013. Web. 08 Mar 2021.

Vancouver:

Gupta MC. Investigation On Flexural Vibrations Of Bolted Laminates. [Internet] [Masters thesis]. Indian Institute of Science; 2013. [cited 2021 Mar 08]. Available from: http://etd.iisc.ac.in/handle/2005/2086.

Council of Science Editors:

Gupta MC. Investigation On Flexural Vibrations Of Bolted Laminates. [Masters Thesis]. Indian Institute of Science; 2013. Available from: http://etd.iisc.ac.in/handle/2005/2086

Indian Institute of Science

25. Vidyashankar, B R. Analysis Of Composite Laminates With Delaminations And Plydrops.

Degree: PhD, Faculty of Engineering, 2012, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/1777

Subjects/Keywords: Composites - Fracture Mechanics; Laminated Composites; Plydrops; Laminated Composite Structures; Classical Laminated Plate Theory (CLPT); Structural Engineering

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Vidyashankar, B. R. (2012). Analysis Of Composite Laminates With Delaminations And Plydrops. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/1777

Chicago Manual of Style (16^th Edition):

Vidyashankar, B R. “Analysis Of Composite Laminates With Delaminations And Plydrops.” 2012. Doctoral Dissertation, Indian Institute of Science. Accessed March 08, 2021. http://etd.iisc.ac.in/handle/2005/1777.

MLA Handbook (7^th Edition):

Vidyashankar, B R. “Analysis Of Composite Laminates With Delaminations And Plydrops.” 2012. Web. 08 Mar 2021.

Vancouver:

Vidyashankar BR. Analysis Of Composite Laminates With Delaminations And Plydrops. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2012. [cited 2021 Mar 08]. Available from: http://etd.iisc.ac.in/handle/2005/1777.

Council of Science Editors:

Vidyashankar BR. Analysis Of Composite Laminates With Delaminations And Plydrops. [Doctoral Dissertation]. Indian Institute of Science; 2012. Available from: http://etd.iisc.ac.in/handle/2005/1777

26. Venâncio, Marco André dos Santos. Comportamento de estruturas compósitas usando uma abordagem multicamada.

Degree: 2017, Repositório Científico do Instituto Politécnico de Lisboa

URL: https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7074

►

Trabalho final de mestrado para obtenção do grau de Mestre em Engenharia Mecânica

A utilização dos materiais compósitos, está cada vez mais difundida pelas várias… (more)

▼

Trabalho final de mestrado para obtenção do grau de Mestre em Engenharia Mecânica

A utilização dos materiais compósitos, está cada vez mais difundida pelas várias áreas da engenharia. Esta crescente importância, leva à necessidade do estudo aprofundado destas estruturas. Um dos vários métodos desenvolvidos para o estudo do comportamento destes materiais, baseia-se numa abordagem multicamada. Com o intuito de estudar o comportamento estático e dinâmico, de diferentes estruturas constituídas por estes materiais, foram implementados dois modelos nas aplicações de computação simbólica e numérica, Maple®e MatLab®. Os códigos implementados, permitem análises estáticas,análises de vibrações livres, e ainda a aplicação de critérios de falha nomeadamente, o critério de Hashin, Tsai-Hill e Tensão Máxima. A validação das implementações destes modelos, foi realizada recorrendo-se a soluções analíticas e numéricas. Foram realizados a nível estático, e das vibrações livres, diferentes estudos da influência de diferentes parâmetros no comportamento da estrutura. Os códigos implementados, permitem assim obter um campo de tensões e de deformações ao longo da espessura, usando uma abordagem mais precisa comparativamente a metodologias de camada equivalente.

The use of composite materials, is increasingly widespread in the various areas of engineering. This growing importance, leads to the need for further study of these structures. One of the numerous methods developed to study the behavior of these materials is based on a multilayer approach. In order to study the static and dynamic behavior of different structures comprised of these materials, two models have been implemented in symbolic and numerical computation applications Maple®and MatLab®. The implemented code, allows carrying out static analysis, free vibration analysis and also the application of failure criteria, namely Hashin, Tsai-Hill and Maximum Stress criteria. The validation of these models were performed making use of analytical and numerical solutions. Different static and free vibrations studies were performed to analysethe influence of different parameters on the behavior of the structure. The implemented codes allow stress and strain field along the thickness, using a more precise approach when compared to other equivalent single layer methodologies.

N/A

Subjects/Keywords: Método dos elementos finitos; Finite element method; Teoria Layerwise; Layerwise theory; Estruturas Sandwich; Sandwich structures; Compósitos laminados; Laminated composites

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Venâncio, M. A. d. S. (2017). Comportamento de estruturas compósitas usando uma abordagem multicamada. (Thesis). Repositório Científico do Instituto Politécnico de Lisboa. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7074

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):

Venâncio, Marco André dos Santos. “Comportamento de estruturas compósitas usando uma abordagem multicamada.” 2017. Thesis, Repositório Científico do Instituto Politécnico de Lisboa. Accessed March 08, 2021. https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7074.

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

MLA Handbook (7^th Edition):

Venâncio, Marco André dos Santos. “Comportamento de estruturas compósitas usando uma abordagem multicamada.” 2017. Web. 08 Mar 2021.

Vancouver:

Venâncio MAdS. Comportamento de estruturas compósitas usando uma abordagem multicamada. [Internet] [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2017. [cited 2021 Mar 08]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7074.

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

Council of Science Editors:

Venâncio MAdS. Comportamento de estruturas compósitas usando uma abordagem multicamada. [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2017. Available from: https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/7074

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

University of Alberta

27. Agrawal, Arun. Specimen thickness effects on mode I & mode II interlaminar toughness of composites using finite element analysis.

Degree: MS, Department of Mechanical Engineering, 2002, University of Alberta

URL: https://era.library.ualberta.ca/files/sj1393911

Subjects/Keywords: Laminated plastics – Deterioration.; Finite element method.; Polymeric composites.

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Agrawal, A. (2002). Specimen thickness effects on mode I & mode II interlaminar toughness of composites using finite element analysis. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/sj1393911

Chicago Manual of Style (16^th Edition):

Agrawal, Arun. “Specimen thickness effects on mode I & mode II interlaminar toughness of composites using finite element analysis.” 2002. Masters Thesis, University of Alberta. Accessed March 08, 2021. https://era.library.ualberta.ca/files/sj1393911.

MLA Handbook (7^th Edition):

Agrawal, Arun. “Specimen thickness effects on mode I & mode II interlaminar toughness of composites using finite element analysis.” 2002. Web. 08 Mar 2021.

Vancouver:

Agrawal A. Specimen thickness effects on mode I & mode II interlaminar toughness of composites using finite element analysis. [Internet] [Masters thesis]. University of Alberta; 2002. [cited 2021 Mar 08]. Available from: https://era.library.ualberta.ca/files/sj1393911.

Council of Science Editors:

Agrawal A. Specimen thickness effects on mode I & mode II interlaminar toughness of composites using finite element analysis. [Masters Thesis]. University of Alberta; 2002. Available from: https://era.library.ualberta.ca/files/sj1393911

University of Alabama

28. Seki, Daigo. A novel damage index for fatigue damage detection in a laminated composites using lamb waves.

Degree: 2015, University of Alabama

URL: http://purl.lib.ua.edu/131895

► A well-established structural health monitoring (SHM) technique, the Lamb wave based approach, is used for fatigue damage identification in a laminated composite. A novel damage… (more)

Subjects/Keywords: Electronic Thesis or Dissertation; – thesis; Aerospace engineering; Mechanical engineering; damage index; fatigue damage identification; Lamb wave; laminated composites; structural health monitoring

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Seki, D. (2015). A novel damage index for fatigue damage detection in a laminated composites using lamb waves. (Thesis). University of Alabama. Retrieved from http://purl.lib.ua.edu/131895

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):

Seki, Daigo. “A novel damage index for fatigue damage detection in a laminated composites using lamb waves.” 2015. Thesis, University of Alabama. Accessed March 08, 2021. http://purl.lib.ua.edu/131895.

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

MLA Handbook (7^th Edition):

Seki, Daigo. “A novel damage index for fatigue damage detection in a laminated composites using lamb waves.” 2015. Web. 08 Mar 2021.

Vancouver:

Seki D. A novel damage index for fatigue damage detection in a laminated composites using lamb waves. [Internet] [Thesis]. University of Alabama; 2015. [cited 2021 Mar 08]. Available from: http://purl.lib.ua.edu/131895.

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

Council of Science Editors:

Seki D. A novel damage index for fatigue damage detection in a laminated composites using lamb waves. [Thesis]. University of Alabama; 2015. Available from: http://purl.lib.ua.edu/131895

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

Vanderbilt University

29. Ahn, Jae Seok. Efficient High-Precision Modeling of Irregularities in Laminated Systems.

Degree: PhD, Civil Engineering, 2010, Vanderbilt University

URL: http://hdl.handle.net/1803/12961

► This study is concerned with the accurate prediction of response of structural components under mechanical loads in the presence of various types of irregularities in… (more)

Subjects/Keywords: delamination; irregularities; laminated composites; p-FEM; efficient modeling

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Ahn, J. S. (2010). Efficient High-Precision Modeling of Irregularities in Laminated Systems. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/12961

Chicago Manual of Style (16^th Edition):

Ahn, Jae Seok. “Efficient High-Precision Modeling of Irregularities in Laminated Systems.” 2010. Doctoral Dissertation, Vanderbilt University. Accessed March 08, 2021. http://hdl.handle.net/1803/12961.

MLA Handbook (7^th Edition):

Ahn, Jae Seok. “Efficient High-Precision Modeling of Irregularities in Laminated Systems.” 2010. Web. 08 Mar 2021.

Vancouver:

Ahn JS. Efficient High-Precision Modeling of Irregularities in Laminated Systems. [Internet] [Doctoral dissertation]. Vanderbilt University; 2010. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/1803/12961.

Council of Science Editors:

Ahn JS. Efficient High-Precision Modeling of Irregularities in Laminated Systems. [Doctoral Dissertation]. Vanderbilt University; 2010. Available from: http://hdl.handle.net/1803/12961

30. Smith, John Robert. Progressive Forming Of Thermoplastic Composite Laminates.

Degree: 2013, University of Alabama – Birmingham

URL: http://contentdm.mhsl.uab.edu/u?/etd,1724

►

Composite materials display excellent specific strength and stiffness, light-weighting benefits, and are effective replacements for metals which are typically heavy and susceptible to corrosion. Next… (more)

▼

Composite materials display excellent specific strength and stiffness, light-weighting benefits, and are effective replacements for metals which are typically heavy and susceptible to corrosion. Next generation transportation, military, infrastructure, and marine sectors are extensively using fiber reinforced composite materials for part replacement and structural applications. Producing these advanced composite structures can often result in extensive development time and material wastage. There is a need to understand composite laminate formability and implement predictive methodology during product design to minimize manufacturing costs.The overall objective of this research was to predict the formability of thick section, plain woven, thermoplastic matrix composite laminates by analyzing parts produced with the combined application of localized heat and pressure. This research dealt with (a) optimizing the manufacturing process for thermoformed laminates using a single, hemispherical cup and a design of experiment approach, (b) generating a global strain map of the formed laminate with continuum mechanics, and using this as a comparative tool to generate a predictive, analytical model built upon bilinearly blended Coons patches and cubic-splines, (c) constructing a finite element model capable of forming conditions to predict global temperature profiles of the laminate, and (d) developing a bi-component shear stress based mechanical relationship for an as-formed part which considered the predicted intraply shear from section (b) and the predicted temperature profile of section (c).Section (a) minimized the amount of cross-sectional variance within one millimeter and permitted the assumption of uniform thickness throughout the thermoforming process. The analytical model of section (b) produced results which were highly comparable to experimental trials. On average, there was a point to point difference of 2.5 millimeters with a standard deviation of 1.4 and a variation in intraply shear of 4.3 degrees with a standard deviation of 4. Thermal profiles of section (c) were determined from finite element analysis and able to match experimental tests for undeformed laminates within an average accuracy of 10Ã‚Â°C. Section (d) summarized the predicted mechanical properties and produced a stress profile for a formed laminate.

PhD

1 online resource (xiv, 124 pages) :illustrations (chiefly color)

Ph. D.University of Alabama at Birmingham2013.

Materials Science and Engineering

Engineering

Composite Deformation Design of Experiment Finite Element Analysis Plain Woven Thermoplastic Composite Laminates Predictive Analytical Model Thermoforming

UNRESTRICTED

Advisors/Committee Members: Uday K. Vaidya, Pillay,Selvum Johnstone,John Eberhardt,Alan Weaver,Mark.

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Smith, J. R. (2013). Progressive Forming Of Thermoplastic Composite Laminates. (Thesis). University of Alabama – Birmingham. Retrieved from http://contentdm.mhsl.uab.edu/u?/etd,1724

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):

Smith, John Robert. “Progressive Forming Of Thermoplastic Composite Laminates.” 2013. Thesis, University of Alabama – Birmingham. Accessed March 08, 2021. http://contentdm.mhsl.uab.edu/u?/etd,1724.

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

MLA Handbook (7^th Edition):

Smith, John Robert. “Progressive Forming Of Thermoplastic Composite Laminates.” 2013. Web. 08 Mar 2021.

Vancouver:

Smith JR. Progressive Forming Of Thermoplastic Composite Laminates. [Internet] [Thesis]. University of Alabama – Birmingham; 2013. [cited 2021 Mar 08]. Available from: http://contentdm.mhsl.uab.edu/u?/etd,1724.

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

Council of Science Editors:

Smith JR. Progressive Forming Of Thermoplastic Composite Laminates. [Thesis]. University of Alabama – Birmingham; 2013. Available from: http://contentdm.mhsl.uab.edu/u?/etd,1724

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

Open Access Theses and Dissertations