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Dissertations / Theses on the topic 'Composite Structures'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Plessas, Spyridon D. "Fluid-structure interaction in composite structures." Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/41432.

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Approved for public release; distribution is unlimited.<br>In this research, dynamic characteristics of polymer composite beam and plate structures were studied when the structures were in contact with water. The effect of fluid-structure interaction (FSI) on natural frequencies, mode shapes, and dynamic responses was examined for polymer composite structures using multiphysics-based computational techniques. Composite structures were modeled using the finite element method. The fluid was modeled as an acoustic medium using the cellular automata technique. Both techniques were coupled so that

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2

BABAEI, IMAN. "Structural Testing of Composite Crash Structures." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2910072.

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3

Denli, Huseyin. "Structural-acoustic optimization of composite sandwich structures." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 168 p, 2007. http://proquest.umi.com/pqdlink?did=1251904511&Fmt=7&clientId=79356&RQT=309&VName=PQD.

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4

Violette, Michael A. "Fluid structure interaction effect on sandwich composite structures." Thesis, Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/5533.

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Approved for public release; distribution is unlimited.<br>The objective of this research is to examine the fluid structure interaction (FSI) effect on composite sandwich structures under a low velocity impact. The primary sandwich composite used in this study was a 6.35-mm balsa core and a multi-ply symmetrical plain weave 6 oz E-glass skin. The specific geometry of the composite was a 305 by 305 mm square with clamped boundary conditions. Using a uniquely designed vertical drop-weight testing machine, there were three fluid conditions in which these experiments focused. The first of these co

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5

Daynes, Stephen. "Intelligent Responsive Composite Structures." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520593.

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6

Oehlers, Deric John. "Mechanisms in composite structures /." Title page, abstract and table of contents only, 2004. http://web4.library.adelaide.edu.au/theses/09END/09endo285.pdf.

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7

Swanson, Gary D. "Structural efficiency study of composite wing rib structures." Thesis, This resource online, 1987. http://scholar.lib.vt.edu/theses/available/etd-04292010-020010/.

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8

Yang, Nana. "Structural strength and reliability analysis of composite structures." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=13242.

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9

Ullah, Israr. "Vibration-based structural health monitoring of composite structures." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/vibrationbased-structural-health-monitoring-of-composite-structures(f21abb03-5b46-4640-9447-0552d5e0c7d6).html.

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Composite materials are in use in several applications, for example, aircraft structural components, because of their light weight and high strength. However the delamination which is one of the serious defects often develops and propagates due to vibration during the service of the structure. The presence of this defect warrants the design life of the structure and the safety. Hence the presence of such defect has to be detected in time to plan the remedial action well in advance. There are a number of methods in the literature for damage detection. They are either 'baseline free/reference fr

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10

Somanath, Nagendra. "A finite element cure model and cure cycle optimization for composite structures." Thesis, This resource online, 1987. http://scholar.lib.vt.edu/theses/available/etd-04272010-020304/.

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11

Le, Riche Rodolphe. "Optimization of composite structures by genetic algorithms." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-164513/.

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12

Brown, Jessica H. "A machine system for the rapid production of composite structures." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19452.

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13

Lannamann, Daniel L. "Structural health monitoring : numerical damage predictor for composite structures." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA390997.

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14

Davies, Andrew. "Crashworthiness of composite sandwich structures." Thesis, Imperial College London, 2002. http://hdl.handle.net/10044/1/8402.

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15

Almaskari, Fahad. "Modelling Damage in Composite Structures." Thesis, University of Manchester, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525981.

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16

Lombetti, D. M. "Tufting of complex composite structures." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/11076.

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This study focuses on the effect of tufting on the mechanical and electrical properties of carbon composites using a variety of tuft materials, such as aramid, steel and copper. Several configurations were investigated based on a case study, involving the reinforcement of stiffener-to-skin interfaces of a tail cone. The effect of tuft and base composite material, tufting depth and inclination on the delamination resistance in mode I was evaluated, the associated bridging laws were determined and the failure mechanisms were identified. A simplified superposition model of the delamination respon

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17

Hou, An. "Strength of composite lattice structures." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/12475.

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18

Lei, Sheng-Yuan. "Deformation micromechanics in composite structures." Thesis, University of Manchester, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488306.

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19

Millhouse, Scott C. "Hydrodynamic forces on composite structures." Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/42686.

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Approved for public release; distribution is unlimited<br>Using a tow tank environment an experiment was set up to measure for response of composite samples of varying stiffness to a geometrically comparable more rigid aluminum sample which was tested at increasing speeds. Also, a square composite shape was tested in a frame providing clamped boundary conditions. Testing of this sample over varying speeds was also performed at varying position angles and was analyzed for force, strain and flow visualization. Results show complex behaviors in fluid flow and structural deformation because of the

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20

Monroy, Aceves Carlos. "Design optimisation of composite structures." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611672.

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21

Yee, Jeffrey Cheze Hui. "Thin CFRP composite deployable structures." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614308.

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22

Cui, Yuefeng. "Adaptive multistable flexible composite structures." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/25513.

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A composite laminate with unsymmetric layup may exhibit two distinct stable configurations at room temperature due to the residual thermal stresses imparted during curing. This bistability leads unsymmetric composite laminates to be good candidates for adaptive flexible structures in particular for the fields of aerospace and aircraft. To extend the application potential of bistable composite laminates, the multistable behaviour of continuous compound composite surfaces are investigated. Two connection approaches are presented in this research. By tailoring the asymmetric bistability of indi-

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23

Malkin, Robert Edward. "Damage tolerant hierarchical composite structures." Thesis, University of Bristol, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557974.

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The use of fibre reinforced polymers is rapidly increasing in a range of applications, from aviation to sporting goods. While the outstanding material properties offered by modern composites make them widely applicable they often suffer from brittle, catastrophic failure. Their inherent brittleness limits their application for safety critical applications without large safety margins. This thesis sets out to introduce design principles that introduce a degree of 'pseudo- ductile' failure behaviour to advanced fibre composites. Much of the inspiration for the work comes from looking at the fail

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24

Harper, Paul. "Fatigue of composite truss structures." Thesis, University of Bristol, 2009. http://hdl.handle.net/1983/817d2f6f-1364-465c-baaa-a5d8ca405658.

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Truss assemblies offer a high stiffness, light-weight option for the construction of aerospace and civil structures. Their more widespread use is currently limited by significant design challenges associated with the nodal joints between struts, particularly in relation to fatigue. The initial focus of this research degree was the multi-partner, DTI funded `Nodal Optimisation of Truss Structures (NOTS)' project, which explored the potential of replacing a conventional metallic panel aircraft rib with a composite truss structure. The role of the author's work within NOTS was to aid the design o

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25

Winkworth-Smith, Charles G. "Cellulose composite structures – by design." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/28823/.

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The aim of the work presented in this thesis was to investigate different mechanical and chemical pre-treatments which can dramatically change the properties of native cellulose and add alternative routes to structure formation. Ball milled cellulose, which had a reduced crystallinity, degree of polymerisation and degradation temperature, was rehydrated in excess water resulting in recrystallisation. Fully amorphous samples recrystallised to the more thermodynamically stable type II polymorphic crystal structure. Flash differential scanning calorimetry (DSC), which allows thermal transitions t

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26

Lee, Hao. "Damage modelling for composite structures." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/damage-modelling-for-composite-structures(ee416524-935c-487d-bcd5-282875e6027a).html.

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Modelling damage in composite materials has played an important role in designing composite structures. Although numerical models for the progressive damage in laminated composites (e.g. transverse cracking, delamination and fibre breakage) have been developed in the literature, there is still a need for further improvement. This thesis aimed at developing damage models suitable for predicting intra-laminar and inter-laminar damage behaviour in fibre-reinforced composite materials. Several approaches such as fracture mechanics and continuum damage mechanics have been adopted for constructing t

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27

Gupta, Priyank, and Srikanth Ananthasubramanian. "Early assessment of composite structures." Thesis, KTH, Hållfasthetslära (Avd.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-241268.

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To meet the need of lightweight chassis in the near future, a technological step of introducing anisotropic materials like Carbon Fibre Reinforced Plastics (CFRP) in structural parts of cars is a possible way ahead. Though there are commercially available tools to find suitability of Fibre Reinforced Plastics (FRPs) and their orientations, they depend on numerical optimization and complexity increases with the size of the model. Nevertheless, the user has a very limited control of intermediate steps. To understand the type of material system that can be used in different regions for a lightwei

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28

Chang, Sheau-Miin. "Critical evaluation of strong organic fibers vis-a-vis mechanical performance in flexible structures." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/8479.

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29

Trinta, Rémi. "Élaboration et étude de l'intégrité structurelle de composite à renfort de verre instrumenté par électronique imprimée." Electronic Thesis or Diss., université Paris-Saclay, 2025. http://www.theses.fr/2025UPAST033.

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Les attentes et exigences concernant les performances et fonctionnalités des pièces et structures composites sont en constante évolution. Ces exigences sont variées : offrir de nouvelles fonctionnalités, sécuriser des structures critiques, répondre à des préoccupations économiques, énergétiques ou environnementales, pour n'en citer que quelques-unes. Les matériaux traditionnels montrent aujourd'hui des limites face à ces exigences croissantes. Pour relever ces nouveaux défis, il est devenu essentiel de concevoir et fabriquer des matériaux et structures innovants, qu'ils soient intelligents, in

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30

Flor, Felipe Rendeiro. "Damage monitoring in composite structures via vibration based method: metal-composite bonded joints and sandwich structures." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18148/tde-04042016-161659/.

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The present document covers the studies over Structural Health Monitoring systems via vibration based methods. The topic is organized in two parallel studies. The first one analyzes the integrity of metal-composite single lap bonded joints. The second one approaches similar analyses for sandwich structures. The monitoring was made by investigating the dynamic response both computationally and experimentally to verify the reliability of applying vibration based SHM procedures, specifically with the objective of identifying the presence of debonding damage. The dynamic responses were obtained vi

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31

Khoo, Stephen W. "Low velocity impact of composite structures." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/7388.

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32

Soleiman, Fallah Arash. "Behaviour of blast resistant composite structures." Thesis, Imperial College London, 2006. http://hdl.handle.net/10044/1/11919.

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33

Chang, Min-Yung. "Active vibration control of composite structures." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-09162005-115021/.

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34

Mills-Brown, Joseph. "High temperature composite materials and structures." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617589.

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The recent resurgence and growing interest in high temperature structures to maximise design space and performance in motorsport applications, led to the need for greater understanding of high temperature composite materials. This study aimed to investigate suitable materials for high temperature structures with application to the motorsport environment. Composite materials were quickly identified as the most appropriate materials given the needs of motorsport, with polysialate composites championed after a thorough review of available materials. A commercially available composite reinforced w

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35

Russell, Jacob E. "Dynamic response of composite structures underwater." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/37704.

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Approved for public release; distribution is unlimited<br>This paper presents a comparison of the dynamic response of composite structures that are subjected to low velocity impacts while being suspended both in air, and submerged in water. As the U.S. Navy continues to use larger composite components in the construction of their ships, an understanding of the effect of submergence in water (i.e., fluid-structure interaction) on various locations of the structures can be instrumental in the design process of ship components. To better understand the responses at varying locations due to fluid-

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36

Padhi, Gouri S. "Numerical failure modeling of composite structures." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312862.

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37

Kontis, Nikolaos. "Damage tolerance of composite stiffened structures." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488883.

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Composite stiffened panels have been extensively used in primary aerospace applications, due to their efficient stiffness/weight ratio and the ability to tailor properties. Despite their apparent superiority to metals, the susceptibility of composites to damage has proved to be a critical factor. A common example in practice is the barely visible impact damage caused by a low velocity impact event. Such events can generate inter-laminar defects (delaminations), which under compressive loading can reduce the strength and stability of the structure. There is a need to establish the influence of

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38

Dizy, Suarez Julian. "Homogenisation of slender periodic composite structures." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/24732.

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The increasing efficiency and performance requirements on current aircraft requires the use of novel configurations and analysis methodologies which capture their behaviour both accurately and efficiently. In spite of the great improvements in computational power, simulating the full 3D structure is too costly and unviable for conceptual design stages. Hence, reduced order models that accurately describe the behaviour of these engineering structures are demanded. This work focuses on those that have a dominant dimension and, because the characteristic length of the sought response so allows it

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39

Spendley, Paul R. "Design allowables for composite aerospace structures." Thesis, University of Surrey, 2012. http://epubs.surrey.ac.uk/810072/.

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Recent developments in aircraft design have seen the Airbus A380 and the Boeing Dreamliner employ significant amounts of advanced composite materials. There is some thought however, und the motivation for this current work, that these materials continue to suffer a weight penalty. In this work tests required to generate design allowables which accommodate environmental effects and holes arc performed on Carbon/epoxy quasi-isotropic laminatcs. The test data is treated statistically to provide B-basis allowables for each specimen type and condition. It was seen that the notched specimens (coupon

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40

Saillant, Jean-Francois. "Study of multilayer piezoelectric composite structures." Thesis, University of the West of Scotland, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.742766.

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41

Steeves, Craig A. "Mechanics of failure in composite structures." Thesis, University of Cambridge, 2001. https://www.repository.cam.ac.uk/handle/1810/272005.

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42

Vovk, S. Ya, and O. Yu Pazen. "Fire resistance of composite concrete structures." Thesis, КТИ КЧС МВД РК, 2017. http://hdl.handle.net/123456789/4038.

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43

Vovk, S. Ya, and O. Yu Pazen. "Fire resistance of composite concrete structures." Thesis, КТИ КЧС МВД РК, 2017. http://hdl.handle.net/123456789/4037.

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44

Jaswal, Priya. "Health Monitoring of Large Composite Structures." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1562842764406158.

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45

Zhang, Chao. "Mechanical behavior of tubular composite structures." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1627489300935781.

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46

Faggiani, Andrea. "Optimisation of postbuckling stiffened composite structures." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/8001.

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The thesis starts off with an introductory chapter on composite materials. This includes a definition of composites, a brief history of composite materials, their use in aerostructures (primarily as stiffened structures), and also optimization of composite structures. A literature review is then presented on postbuckling stiffened structures. This includes both experimental investigations on stiffened composite panels and investigations into secondary instabilities and mode jumping as well as their numerical modelling. Next, the Finite Element (FE) modelling of posthuckling stiffened structure

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47

Cullinan, Jack Francis. "In-situ repair of composite structures." Thesis, University of Bristol, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738199.

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48

GARG, RAVIN. "Design of Crashworthy Automotive Composite Structures." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2910074.

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49

Kabche, Jean Paul. "Structural Testing and Analysis of Hybrrid Composite/Metal Joints for High-Speed Marine Structures." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/kabchejp2006.pdf.

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50

Na, Gwang-Seok. "Load-displacement behavior of frame structures composed of fiber reinforced polymeric composite materials." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26699.

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Thesis (Ph.D)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Dr. Leroy Z. Emkin; Committee Co-Chair: Dr. Abdul-Hamid Zureick; Committee Member: Dr. Dewey H. Hodges; Committee Member: Dr. Kenneth M. Will; Committee Member: Dr. Rami M. Haj-ali. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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