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Dissertations / Theses on the topic 'Laminated materials Composite materials'

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1

Deka, Lakshya J. "Quasi-static and multi-site high velocity impact response of composite structures." Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008p/deka.pdf.

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Thesis (Ph. D.)--University of Alabama at Birmingham, 2008.<br>Additional advisors: Krishan K. Chawla, Derrick Dean, Jong-Eun Kim, Mark Weaver. Description based on contents viewed Feb. 9, 2009; title from PDF t.p. Includes bibliographical references.
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2

Sambasivam, Shamala. "Thermoelastic stress analysis of laminated composite materials." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/72144/.

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In this work thermoelastic stress analysis (TSA) is used to obtain quantitative stress/ strain data from a variety of multi-directional laminated composites. In order to in- terpret the thermoelastic signal correctly the source of the thermoeleastic response has been investigated in detail. In this thesis four possible routines to extract quantitative stress/strain information from thermoelastic data have been explored. A set of carefully selected glass/epoxy composite specimens with designated stacking sequences provided a scheme to identify the source and nature of the thermoelastic response
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3

Yan, Chang (Karen). "On homogenization and de-homogenization of composite materials /." Philadelphia, Pa. : Drexel University, 2003. http://dspace.library.drexel.edu/handle/1860/246.

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4

Moorthy, Jayashree. "Dynamic instability of composite laminated plates." Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/52090.

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Dynamic instability in a laminated composite plate is studied using the finite element technique. The governing equations are derived based on the first order shear deformation theory with a linear strain-displacement relationship. The regions of instability for the resulting set of coupled Mathieu equations are obtained using a method of simultaneous diagonalization. Boundary frequencies generated using a first subdeterminant approximation to the infinite determinant are compared with those obtained by using the more accurate second subdeterminant as well as with frequencies from an analytica
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5

Li, Rufeng. "Nonlinear viscoelastic stress and fracture analyses of laminated composites /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9978.

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6

Bovicelli, Federico. "On the influence of polymeric nanofibers in laminated composite materials. Studio dell'influenza di nanofibre polimeriche in materiali compositi laminati." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6784/.

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During the last years an increased interest about the reinforcement of laminated composites by means of polymeric nanofibers has been growth. During this master-degree-thesis work, unidirectional and plane-textile composites have been interleaved with Nylon 6.6, PCL and mixed (Nylon 6.6+PCL) nanofibrous mats and the DCB (mode I interlaminar fracture toughness), ENF (mode II interlaminar fracture toughness and DMA (damping capability) tests have been performed. Regarding the interlaminar fracture toughness, marked increases have been recorded; while further investigation about damping capabilit
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7

Zhang, Fangzhou. "Multiscale modeling of laminated composites under extreme environmental conditions." Thesis, Cachan, Ecole normale supérieure, 2014. http://www.theses.fr/2014DENS0027/document.

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À haute température, l'oxygène réagit avec la matrice organique du matériau composite, ce qui change les propriétés du matériau et réduit la résistance à la rupture globale. Mais la compréhension de la dégradation du composite stratifié oxydé, en particulier son comportement à l'échelle du pli, est aujourd'hui limitée et phénoménologique. Les travaux dans cette thèse ont été réalisés pour donner notre contribution sur les aspects méthodologiques de ce sujet. Des essais sont réalisés pour caractériser expérimentalement le comportement d'éprouvette oxydée : en particulier, un nouveau essai, l'es
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8

Mespoulet, Stephane. "Through-thickness test methods for laminated composite materials." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/7314.

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9

Wood, Geoffrey Michael. "Treatment of polyethylene fibre for improved fibre to resin adhesion in composite applications." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28528.

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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 re
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10

Weinstein, Freddy. "Studies in interlaminar fracture of composite laminates." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/11829.

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11

Lee, Jaehong. "Vibration, buckling and postbuckling of laminated composites with delaminations." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-170322/.

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12

Makeev, Andrew. "Geometrically nonlinear analysis of laminated composites with extension-twist coupling." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/12028.

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13

Lee, Bok W. "Application of variational-asymptotical method to laminated composite plates." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/20695.

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14

Teh, Kuen Tat. "Impact damage resistance and tolerance of advanced composite material systems." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-170512/.

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15

Adams, Daniel O'Hare. "Effects of layer waviness on compression-loaded thermoplastic composite laminates." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08252008-161903/.

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16

Goonetilleke, Hemaguptha Dharmaraj. "Free-edge effects around holes in composite laminates." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27305.

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The free-edge effect around holes in composite laminates has recieved less attention than the straight free-edge problem. Mathematical analysis of free-edge stresses around holes have mostly been numerical. The present work develops a simple approximate solution of the hole problem which allows for low cost computation. The method assumes that only the deviations of the ply stresses from the homogeneous plate solution of in-plane stresses around holes contribute to the interlaminar effects. It is then possible to use an equilibrium argument to calculate the interlaminar stresses at the hole bo
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17

Barker, Daniel Keith. "Active dynamic response tuning of adaptive composites utilizing embedded nitinol actuators." Thesis, This resource online, 1989. http://scholar.lib.vt.edu/theses/available/etd-03042009-041038/.

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18

Simelane, Philemon Sphiwe. "Thermal buckling of laminated composite plates." Thesis, Peninsula Technikon, 1998. http://hdl.handle.net/20.500.11838/1240.

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Thesis (MTech (Mechanical Engineering))--Peninsula Technikon, 1998<br>However, studies were also conducted for the buckling of composite laminates involving temperature distribution. Chen and Chen (1991) studied thermal buckling of laminated plates under uniform and nonuniform temperature distribution using the eight-node Serendipity finite element. Mathew, Singh and Rao (1992) investigated thermal buckling of antisymmetric cross-ply composite laminates with a onedimensional furite element having two nodes and six degrees of freedom. Chandrashekhara (1992) accounted for transverse shear
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19

Rhee, Kyong Yop. "Studies on numerical and experimental determination of energy release rate for composite laminates." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/18971.

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20

Kouri, Jeffrey Victor. "Improved finite element analysis of thick laminated composite plates by the predictor corrector technique and approximation of C[superscript]1 continuity with a new least squares element." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/20762.

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21

Singhiv, Sarvesh. "Analysis, shape sensitivities and approximations of modal response of generally laminated tapered skew plates /." This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-03022010-020223/.

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22

Naskar, Susmita. "Spatial variability characterisation of laminated composites." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=239036.

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Advanced lightweight structural materials like composites are being increasingly utilized in various engineering applications due to high specific strength and stiffness with tailorable properties. Even though composites have the advantage of modulating a large number of design parameters to achieve various application-specific requirements, this concurrently brings the challenge of dealing with inevitable uncertainties during manufacturing and service-life conditions. This dissertation focuses on practically relevant modelling of random spatial variability coupled with the influence of damage
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23

Obst, Andreas W. "Nonlinear static and transient analysis of generally laminated beams." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10102009-020113/.

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24

Chandramohan, Sasikumar. "An interactive approach to structural design on flanged laminated composite ducts." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2827.

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Thesis (M.S.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains xiv, 180 p. : ill. Includes abstract. Includes bibliographical references (p. 115-118).
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25

Boeman, Raymond G. "Interlaminar deformations on the cylindrical surface of a hole in laminated composites : an experimental study /." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-09162005-115037/.

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26

Li, Edward. "Characterization of mechanical and fatigue properties for a hybrid titanium composite laminate." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/19897.

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27

Fortson, Bryan H. "Damage processes and fracture surface marphology in laminated composites." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/12957.

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28

Graesser, Douglas Lee. "Design of laminated composite panels optimized for damage tolerance /." Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/7080.

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29

Karim, Md Rezaul. "Transient response of laminated composites with subsurface cracks." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184541.

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The dynamic response of subsurface cracks in fiber reinforced composites is analytically studied. The response of layered half-space and three-layered plate with two interface cracks excited by a plane SH-wave and line load respectively are studied by formulating the problem as integral equations in the frequency domain. The governing equations along with boundary, regularity and continuity conditions across the interface are reduced to a coupled set of singular integral equations by using Betti's reciprocal theorem along with the Green's functions. In addition, the transient response of an or
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30

Breivik, Nicole L. "Compression of thick laminated composite beams with initial impact-like damage." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09052009-040529/.

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31

Joyce, Peter James. "Experimental investigation of defect criticality in FRP laminate composites /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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32

Chang, Cherng-Chi. "Finite element analysis of laminated composite free-edge delamination specimens /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487584612162791.

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33

Gupta, Arnab. "Monitoring Progressive Damage Development in Laminated Fiber Reinforced Composite Materials." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78766.

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With increasing applications of composite materials, their health monitoring is of growing importance in engineering practice. Damage development in composite materials is more complex than for metallic materials, because in composite materials (a) multiple damage modes are simultaneously in play, and (b) individual 'damage events' that occur throughout a component's service life may neither noticeably affect its performance, nor suggest future failure. Therefore, informed health monitoring of composite components must include monitoring and analysis of their health state throughout their serv
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34

Scott, Colin. "A study of fracture in brittle laminar composites that contain weak interlayers /." *McMaster only, 2001.

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35

Kugler, Danielle. "Experimental investigation of the effect of changes in processing history on compositie laminates and cylinders /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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36

Garcia, Jorge David Aveiga. "A delamination propagation model for glass fiber reinforced laminated composite materials." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18148/tde-31072018-143609/.

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The employment of composite materials in the aerospace industry has been gradually considered due to the fundamental lightweight and strength characteristics that these type of materials offer. The science material and technological progress that has been reached, matches perfectly with the requirements for high-performance materials in aircraft and aerospace structures, thus, the development of primary structure elements applying composite materials became something very convenient. It is extremely important to pay attention to the failure modes that influence composite materials performances
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37

Malik, Basharat U. "Fatigue delamination growth under cyclic compression in unidirectional composites." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/12094.

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38

Nagendra, Somanath. "Optimal stacking sequence design of stiffened composite panels with cutouts." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-170635/.

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39

Cui, Guiyong. "Experimental study of the through-thickness strength of laminated composites." Thesis, University of Oxford, 1994. http://ora.ox.ac.uk/objects/uuid:80258f41-5358-447c-8047-0769c93f062c.

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Complicated structures made of fibre reinforced laminates will suffer the failure of delamination which is the main through-thickness failure mode and is usually caused by the combined through-thickness stress state. Three tests, namely the oblique test, the waisted C-specimen test and the notched beam test, have been developed to reveal the failure activities under the combined stress state of in-plane normal stress, through-thickness normal stress and interlaminar shear, and, as a part of the big project, to establish a 3-D failure map in the coordinates of the three stress components. All t
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40

Howard, William E. "Edge caps for reinforcing composite laminates." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/91122.

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A method for reinforcing the free edges of a symmetric 11-ply graphite-epoxy laminate by adding a one-layer Kevlar-epoxy edge cap is studied. Generalized plane strain finite element analysis is used to predict that interlaminar stresses are reduced when an edge cap is added to the laminate. Different edge cap designs are evaluated. A three-dimensional composite failure criterion and finite element analysis are used in a progressive laminate failure analysis to predict the failure load of the reinforced luminate. The results of an experimental program are presented. Cappad laminates are shown
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41

Zhao, Huyue. "Stress Analysis of Tapered Sandwich Panels with Isotropic or Laminated Composite Facings." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/ZhaoH2002.pdf.

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42

La, Saponara Valeria. "Crack branching in cross-ply composites." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/11973.

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43

Tudela, Mark A. "Impact response of a laminated beam on an elastic foundation." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/17880.

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44

Derstine, Mark S. "Combined mechanical loading of composite tubes." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43841.

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45

Barbero, Ever J. "On a generalized laminate theory with application to bending, vibration, and delamination buckling in composite laminates." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54484.

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In this study, a computational model for accurate analysis of composite laminates and laminates with including delaminated interfaces is developed. An accurate prediction of stress distributions, including interlaminar stresses, is obtained by using the Generalized Laminate Plate Theory of Reddy in which layer-wise linear approximation of the displacements through the thickness is used. Analytical, as well as finite-element solutions of the theory, are developed for bending and vibrations of laminated composite plates for the linear theory. Geometrical nonlinearity, including buckling and post
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46

Norwood, Donald Scott. "An analysis of interlaminar stresses in unsymmetrically laminated plates." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/37317.

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47

Li, Jian. "Interlaminar fracture analysis for laminated composites under combined loading." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/13099.

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48

Gummadi, Lakshmana Nagesh Babu. "Active control of delaminations in smart composite structures." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/13022.

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49

Cobb, Ted Quincy Jr. "Optimization of hybrid titanium composite laminates." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19965.

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50

Tang, Bruce S. "Lamb wave propagation in laminated composite plates." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/80194.

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Low frequency Lamb waves in composite laminates were investigated theoretically and experimentally. To have a general solution for Lamb wave propagation in multilayered composite laminates is not practical due to a large number of boundary conditions needed to be satisfied at the interlaminar interfaces. Various approximate theories have been proposed to model low frequency Lamb wave propagation in composite laminates. In the present study, an approximate solution was derived from an elementary shear deformation plate theory and was shown to work well in the low frequency, long wavelength regi
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