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Dissertations / Theses on the topic 'Theory of laminates'

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Published: 3 June 2025

Last updated: 19 July 2025

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1

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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2

Dano, Marie-Laure. "SMA-induced deformations in unsymmetric cross-ply laminates." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09122009-040504/.

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3

Liu, Chorng-Fuh. "Geometrically nonlinear analysis of composite laminates using a refined shear deformation shell theory." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54453.

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The theory is based on an assumed displacement field, in which the surface displacements are expanded in powers of the thickness coordinate up to the third order. The theory allows parabolic description of the transverse shear stresses, and therefore the shear correction factors of the usual shear deformation theory are not required in the present theory. The theory accounts for small strains but moderately large displacements (i.e., von Karman strains). Exact solutions for certain cross-ply shells and finite-element models of the theory are also developed. The finite-element model is based on

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4

Weise, Michael. "Adaptive FEM for fibre-reinforced 3D structures and laminates." Doctoral thesis, Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-150439.

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The topic of this thesis is the numerical simulation of transversely isotropic 3D structures and laminates by means of the adaptive finite element method. To achieve this goal, the theoretical background of elastic deformation problems, transverse isotropy, plate theory, and the classical laminate theory is recapitulated. The classical laminate theory implies a combination of the membrane problem and the plate problem with additional coupling terms. The focus of this work is the adjustment of two integral parts of the adaptive FE algorithm according to the classical laminate theory. One of th

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5

Santos, Matheus Vilar Mota. "Analysis of delamination of composite laminates through the XFEM based on the Layerwise displacement theory." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18148/tde-03102018-122551/.

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Composite laminates are being more employed as fundamental structures due to its low weight and high stiffness. An example of this innovation is the primary structures of modern aircraft, which are lighter than the material formerly used. To predict the material response as load gradually increases can be quite demanding due to composite\'s complex failure mechanism. Hence superior computational models should be further investigated to precisely predict the mechanical behavior of composite media. This dissertation addresses an extended finite element procedure based on the layerwise displacem

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6

Reddy, Yeruva S. "Numerical simulation of damage and progressive failures in composite laminates using the layerwise plate theory." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/38534.

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7

OJO, SAHEED OLALEKAN. "Thermo-visco-elastic modelling of photovoltaic laminates: Advanced shear-lag theory and model order reduction techniques." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2650003.

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During lamination, residual thermo-mechanical stresses are induced in the encapsulated solar cells composing photovoltaic (PV) modules. Depending on the material and geometrical configuration of the layers of the laminate, this residual stress field can be beneficial since it may lead to a compressive stress state in Silicon and therefore crack closure effects in the presence of cracks, with a recovery of electrical conductivity in cracked solar cells. It is therefore important to investigate the distribution of thermo-mechanical stresses within the PV laminate with a view to optimizing the co

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8

Teixeira, Préve Deison. "Thermoelastic and Fracture Responses of Periodic Materials: Theory and Applications to Laminates and Triply Periodic Minimal Surfaces." Thesis, IMT Alti Studi Lucca, 2022. http://e-theses.imtlucca.it/368/1/Teixera_phdthesis.pdf.

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In order to provide better quality on a variety of equipment, services and new technologies to the community, periodic materials as laminates and periodic structures as foams are constantly gaining more attention world-wide, due to the fact that these structures present suitable mechanical behaviours, enhanced physical properties and are yet low-cost. There- fore, it is crucial to understand how these structures respond for different physical and mechanical problems. The present thesis exploits how cer-tain periodic structures behave and respond under thermo-mechanical loading and fracture p

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9

Li, Changyou. "Electromagnetic modeling and simulation of fiber-reinforced periodically-structured planar laminates." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112219/document.

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La thèse porte sur la modélisation électromagnétique et la simulation de composites stratifiés plans (laminés), renforcés par des fibres organisées périodiquement. L'objectif est d'acquérir une bonne compréhension du comportement électromagnétique de telles structures, en première et étape de ce que pourrait ultérieurement être la production d’images mettant en évidence la localisation de zones éventuellement endommagées, et fournissant une certaine quantification de celles-ci. La thèse proprement dite se concentre donc sur la construction et l’évaluation de modèles de la diffraction électroma

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10

Chan, Yiu Mo Patton. "Laminated beam theory based on homogenization." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0022/MQ50485.pdf.

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11

Chang, Jin-Der. "Theory of thick, laminated composite shallow shells /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487779914824542.

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12

Dandan, Razan A. "Self-consistent dynamical theory of composite laminated plates /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487850665557227.

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13

Kassegne, Samuel Kinde. "Layerwise theory for discretely stiffened laminated cylindrical shells." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-07282008-134249/.

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14

Moazzami, Mehdi. "A higher order layer-wise theory of laminated plates." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1273001724.

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15

Daniewicz, David Joseph 1965. "Edge delamination in advanced laminated composites, theory and verification." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277294.

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A damage evolution theory capable of predicting the effects of edge delamination phenomena on composite laminate response is developed. The theory is a mechanics-based formulation which quantifies the damage development of a laminate under general loading, and incorporates it directly to the constitutive behavior of the laminate. The theoretical development introduces a laminate-specific constant φ; the methodology of φ selection is presented for [±15/±50]s, [±45/0/90]s, and [0₂/90₂]s T300 graphite/epoxy laminates. Edge effects are demonstrated by comparing the damage state of the above lamina

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16

Brown, Howard Wm. "Higher order theory analysis of a modified free-edge delamination specimen /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487326511715167.

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17

Yalcin, Omer Fatih. "A Dynamic Theory For Laminated Composites Consisting Of Anisotropic Layers." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607116/index.pdf.

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In this thesis, first a higher order dynamic theory for anisotropic thermoelastic plates is developed. Then, based on this plate theory, two dynamic models, discrete and continuum models (DM and CM), are proposed for layered composites consisting of anisotropic thermoelastic layers. Of the two models, CM is more important, which is established in the study of periodic layered composites using smoothing operations. CM has the properties: it contains inherently the interface and Floquet conditions and facilitates the analysis of the composite, in particular, when the number of laminae in the com

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18

Karash, E. T. "Multilayer theory for delamination stresses in semicircular laminated composite curved bars." Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/25834.

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Composites laminates are widely used in both civil and military aircraft structures and gases cylinders leading to weight saving. However, study of the behaviour of such materials has shown that they are more damage sensitive than metallic material especially to delamination due to edge effect or low velocity impact [1]. In order to improve the performance of composite structures, advances must be made in the prediction of delamination growth and the evaluation of residual strength. The aim of this paper is to extend a delamination model valid for the plate in small displacement [2] or large d

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19

Hong, Soon-jo. "A consistent shear deformable theory for the vibration of laminated plates /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487592050229547.

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20

Amin, Abdelmoniem Mohamed. "A coupled theory of heat, moisture, and deformation of laminated structures /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487672631602907.

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21

Schoeppner, Gregory Alan. "A stress based theory describing the dynamic behavior of laminated plates /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487688973685822.

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22

Chyou, Hui-Huang Abel. "Variational formulation and finite element implementation of Pagano's theory of laminated plates /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487671108308444.

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23

Foos, Bryan Carl. "A stress based theory describing the coupled thermoelastic behavior of laminated plates /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488186329504446.

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24

Palmerio, Ariovaldo Felix. "On a moderate rotation theory for anisotropic shells." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/82630.

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The present work discusses a new moderate rotation theory for anisotropic shells, proposed by Schmidt and Reddy. All aspects of the derivations are explicitly covered and a finite element formulation of the theory is developed for the solution of test cases. Specific forms of the equations for rectangular plates, cylindrical and spherical shells are derived and the respective finite elements are implemented in a computer code. In order to compare the results, two other theories are implemented: a refined von Karman type shell theory and a shell theory proposed by Librescu. A finite element c

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25

Austin, Travis R. "Laminated PAINT." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5462.

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Though we may not perceive it, we are surrounded by material-in-flux. Inert materials degrade and the events that comprise our natural and social environments causally thread into a duration that unifies us in our incomprehension. Sounds reveal ever-present vibrations of the landscape: expressions of the flexuous ground on which we stand.

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26

Subba, Rao Vinay Sagar. "Evaluation of mechanical properties of laminated composites using Multi-Continuum Theory in ABAQUS." Thesis, Wichita State University, 2010. http://hdl.handle.net/10057/3748.

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A thorough knowledge of the mechanical properties of composites is very important for proper design and optimization of structures in composite applications. Experimental determination of these properties like strength and modulus is prohibitively expensive, as there are unlimited combinations of matrix type, fiber type and stacking sequences possible. In this thesis, “Progressive Damage Modeling” is used to simulate the notched and un-notched tension and compression tests to obtain the strength and stiffness properties of composites. A quasi-isotropic layup (25/50/25) of Toray T700GC-12K-31E/

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27

Lo, Patrick Kar-Leung. "Comparison of theory and experiment for flexural-torsional buckling of laminated composite columns." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/50051.

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Vlasov’s one-dimensional structural theory for thin-walled open section bars was originally developed and used for metallic elements. The theory was recently extended to laminated bars fabricated from advanced composite materials. The purpose of this research is to provide a study and assessment of the extended theory. The focus is on flexural and torsional-flexural buckling of thin-walled, open section, laminated composite columns. Buckling loads are computed from the theory using a linear bifurcation analysis, and are compared to available experimental data. Also, a geometrically nonlinear b

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28

Na, Wook Jin. "Damage analysis of laminated composite beams under bending loads using the layer-wise theory." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2774.

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29

Ahmed, Malik Nazir. "The constrained torsional analysis of thin-walled variable cross-section multi-cell laminated composite beams." Thesis, Cranfield University, 1999. http://hdl.handle.net/1826/3002.

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A Constrained Torsional Analysis of Thin-Walled Variable Cross-Section Multi-Cell Laminated Composite Beams has been undertaken . The existing Isotopic theory has been modified using the effective engineering elastic constants to cater for the Composite structures under torsional loads. The relevant computer programs for the Composite structure analysis have also been developed. The results are discussed in detail for single-cell and multi-cell prismatic/tapered beams for all [0/45/-45/90], lay up in flanges and webs, all [45/-45]2], lay-up in flanges and webs, and for flanges [0/45/-45/90], &

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30

Kurpa, Lidiya, Olga Mazur, and Igor Tsukanov. "Application of R-Functions Theory to Study Parametric Vibrations and Dynamical Stability of Laminated Plates." Thesis, Точка, 2013. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37087.

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The problem of nonlinear parametric vibrations and stability analysis of the symmetric laminated plates is considered. The proposed method is based on multimode approximation of displacements and solving series auxiliary linear tasks. The main feature of the work is the application of the R-functions theory, which allows investigating parametric vibrations of plates with complex shape and different boundary conditions.

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31

Chapman, Benjamin James. "Continuous fibre reinforced thermoplastic pipes." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285377.

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32

Sanches, Mauro Luis Ramalho. "A development of a finite element method based on a novel theory of laminated composite beam." Instituto Tecnológico de Aeronáutica, 2008. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=865.

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In the analysis of composite beams (laminate or sandwiches), sometimes it is very important to estimate the effect of the transverse shear (direction z). Many works about this theme were already developed (beam and plate theories, Zig-Zag theories, full three-dimensional approaches), each one with its own advantages and disadvantages (intrinsic inaccuracy, large number of degree of freedom, great computational effort). A point to observe is that those theories, in general, are unable to solve problems involving highly located effects, such as those associated to free-edges, cut-outs and concen

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33

LAMBERTI, ALESSANDRO. "Axiomatic/Asymptotic Analysis and Best Theory Diagrams for Laminated Plates/Shells Loaded by Mechanical, Thermal and Electrical Loadings." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2607764.

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The purpose of the work described in this thesis is to decrease the computational cost of refined plate/shell models without loosing accuracy in the plate/shell response analysis. The axiomatic/asymptotic technique has been employed for this purpose. The refined models have been obtained by means of the Carrera Unified Formulation and both the Principle of Virtual Displacement (PVD) and the Reissner Mixed Variational Theorem (RMVT) have been employed to derive the governing equations. Mechanical and multifield problems are considered. Navier-like closed form solutions has been employed, and fo

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Ananthasubramanian, Srikanth, and Priyank Gupta. "Early assessment of composite structures : Framework to analyse the potential of fibre reinforced composites in a structure subjected to multiple load case." Thesis, KTH, Lättkonstruktioner, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235309.

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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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35

Pauer, Brett Arnold. "Development of a finite element method program for the analysis of laminated composite plates using first-order shear deformation theory." Connect to resource, 1993. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1232807239.

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36

Maimí, Vert Pere. "Modelización constitutiva y computacional del daño y la fractura de materiales compuestos." Doctoral thesis, Universitat de Girona, 2007. http://hdl.handle.net/10803/7766.

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En el trabajo se definen modelos constitutivos que permiten reproducir el proceso de fallo de estructuras de materiales compuestos en distintas escalas bajo cargas estáticas. <br/>Se define un modelo constitutivo para determinar la respuesta de estructuras de materiales compuestos mediante la teoría de laminados. El modelo es validado mediante un programa de ensayos experimentales con probetas con un agujero central geométricamente similares. Se muestra la capacidad del modelo de detectar el efecto tamaño.<br/>Se define un modelo constitutivo para materiales transversalmente isótropos bajo est

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37

Ho, Qhinhon D. "An Assessment Of The Accuracy Of The Euler-Bernoulli Beam Theory For Calculating Strain and Deflection in Composite Sandwich Beams." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/2084.

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This study focuses on assessing the accuracy of the Euler-Bernoulli beam theory as computational bases to calculate strain and deflection of composite sandwich beam subjected to three-point and four-point bending. Two groups of composite sandwich beams tests results will be used for comparison purposes. Mechanical properties for the laminated skin are provided by researchers from University of Mississippi (Ellen Lackey et al., 2000). Mechanical properties for the balsa wood core are provided by Alcan Baltek Corporation. Appropriate material properties and test geometries are then used in the E

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38

Balarezo, Salgado José Illarick, and Arroyo Edgard Cristian Corilla. "Análisis de vibración libre de vigas laminadas de materiales compuestos utilizando el método de elementos finitos." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/657266.

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Se presenta un modelo de elementos finitos que describe el comportamiento de vibración de libre de vigas compuestas laminadas. Se desarrolla el modelo utilizando el principio de Hamilton y la teoría de vigas Timoshenko que incluye deformaciones por corte. Se asume interpolaciones de alto orden para la aproximación de las variables fundamentales. Los laminados compuestos son ortotrópicos con fibras orientadas en diferentes direcciones. Se implementa un programa para materiales compuestos laminado en MATLAB. Se comparan resultados con otros obtenidos en la literatura para validar el modelo. Se r

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39

Lee, Seung Joon. "Nonlinear analysis of smart composite plate and shell structures." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/2218.

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Theoretical formulations, analytical solutions, and finite element solutions for laminated composite plate and shell structures with smart material laminae are presented in the study. A unified third-order shear deformation theory is formulated and used to study vibration/deflection suppression characteristics of plate and shell structures. The von K??rm??n type geometric nonlinearity is included in the formulation. Third-order shear deformation theory based on Donnell and Sanders nonlinear shell theories is chosen for the shell formulation. The smart material used in this study to achieve d

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Balarezo, Salgado José Illarick, and Arroyo Edgard Cristian Corilla. "Análisis de vibración libre de vigas laminadas de materiales compuestos utilizando el método de elementos finitos." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2001. http://hdl.handle.net/10757/654828.

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Esta investigación se enfoca en el análisis de vibración libre de vigas Timoshenko utilizando el método de elementos finitos. Se desarrolla el modelo utilizando el principio de Hamilton y la teoría de vigas Timoshenko que incluye deformaciones por corte. Se asume interpolaciones de alto orden para la aproximación de las variables fundamentales. Los materiales para emplear son isotrópicos. Se implementa un programa para estos materiales en MATLAB. Se comparan resultados con otros obtenidos en la literatura para validar el modelo. Se realiza un estudio paramétrico con una misma longitud y difere

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Casula, Henrique Cury. "Aplicação de técnicas de previsão de demanda em manufatura = estudo de caso em uma indústria de laminados." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265652.

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Orientador: Antonio Batocchio<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-20T08:27:21Z (GMT). No. of bitstreams: 1 Casula_HenriqueCury_M.pdf: 1869496 bytes, checksum: 0ebc9d261c898a9363cb007fa72f0bef (MD5) Previous issue date: 2012<br>Resumo: A previsibilidade é uma importante ferramenta que os tomadores de decisão buscam nas suas escolhas. Entende-se a tomada de decisão como o processo de identificação de um problema ou de uma oportunidade e a seleção de uma linha de ação para resolvê-la ou de alteraç

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Machů, Zdeněk. "Výpočtové modelování piezoelektrických vrstevnatých kompozitů a analýza jejich elektro-mechanické odezvy při harmonickém kmitání." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400492.

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V současnosti je velmi aktuálním tématem generování elektrické energie z alternativních zdrojů, zejména z vibrací. Zařízení, která přeměňují mechanickou energii na elektrickou, využívají často ke své činnosti piezoelektrický jev. Pro optimální nastavení takového elektromechanického měniče pro danou aplikaci je třeba mít k dispozici výpočtový model, který bude schopný postihnout všechny klíčové aspekty jeho provozu. Tato práce se tedy zabývá vytvořením takovéhoto nástroje, který je schopen komplexně popsat elektromechanickou odezvu studovaného piezoelektrického měniče energie v podobě vetknutéh

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Nogueira, Geovanne Viana. "Formulação de elemento finito posicional para modelagem numérica de pórticos planos constituídos por compósitos laminados: uma abordagem não linear geométrica baseada na teoria Layerwise." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-27052015-171842/.

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A análise de compósitos laminados apresenta grandes desafios, pois, diferentemente dos materiais isotrópicos homogêneos, os compósitos laminados são constituídos de materiais heterogêneos e anisotrópicos. Além disso, as distribuições de tensões interlaminares obtidas com as formulações convencionais são descontínuas e imprecisas. Sua melhoria, portanto, é imprescindível para buscar e modelar critérios de falha relacionados às estruturas formadas por compósitos laminados. Diante disso, este trabalho se concentrou no desenvolvimento e implementação computacional de um elemento finito posicional

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Weisz-Patrault, Daniel. "Recherche et utilisation de méthodes analytiques inverses pour des problèmes couplés thermo élastiques." Thesis, Paris Est, 2012. http://www.theses.fr/2012PEST1171/document.

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Ce travail de doctorat porte sur l'utilisation des mathématiques analytiques dans le cadre de méthodes inverses appliquées à l'industrie. Ces travaux tiennent au développement de capteurs inverses en temps réel adaptés au laminage industriel. Le producteur d'acier ArcelorMittal dirige un projet européen, qui vise à montrer la faisabilité de capteurs mesurant les champs (température, contraintes) dans le contact entre le produit et l'outil sans altérer les conditions de ce contact. Les travaux de thèse présentés dans ce mémoire ont été réalisés au sein du laboratoire Navier et financé par l'éco

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Bydalek, David Russell. "Manufacture of Complex Geometry Component for Advanced Material Stiffness." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1919.

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The manufacture, laminate design, and modeling of a part with complex geometry are explored. The ultimate goal of the research is to produce a model that accurately predicts part stiffness. This is validated with experimental results of composite parts, which refine material properties for use in a final prototype part model. The secondary goal of this project is to explore manufacturing methods for improved manufacturability of the complex part. The manufacturing portion of the thesis and feedback into material model has incorporated a senior project team to perform research on manufacturing

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Kokkinos, Filis-Triantaphyllos T. "Three-dimensional layerwise modeling of layered media with boundary integral equations." Diss., This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02132009-170805/.

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IURLARO, LUIGI. "Development of refined models for multilayered composite and sandwich structures: analytical formulation, FEM implementation and experimental assessment." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2606162.

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Over the last three decades, composite materials have been increasingly used in different engineering field due to their high stiffness-to-weight and strength-to-weight ratios. Nowadays, relatively thick laminated composite and sandwich materials with one hundred or more layers find their applications in primary load-bearing structural components of the modern aircraft. To ensure a reliable design and failure prediction, accurate evaluation of the strain/stress state is mandatory. A high-fidelity analysis of multilayered composite and sandwich structures can be achieved by adopting detailed 3D

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Lebée, Arthur. "Homogénéisation de plaques périodiques épaisses : application aux panneaux sandwichs à âme pliables en chevrons." Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00557754.

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Les panneaux sandwichs sont des éléments de structure omniprésents au quotidien. Leur efficacité structurelle n'est plus à démontrer. Elle est même un élément déterminant dans le marché qui leur est associé. Ce mémoire de doctorat s'intéresse à un nouveau type d 'âme de panneau sandwich qui pourrait être amené à supplanter le nid d'abeilles dans certaines applications, le module à chevrons. L'objectif est donc de pouvoir faire une estimation précise du comportement de ces nouvelles âmes. Cependant le gain en efficacité structurelle des panneaux sandwichs se paye par une augmentation considérab

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Dohnalík, Petr. "Návrh optimálních parametrů vícevrstvého keramického ochranného povlaku pro vysokoteplotní aplikace." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318659.

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The main objective of this work was to design a suitable composition of a protective coatings, made of several different layers of specific materials - with respect to residual stress, induced due to a mismatch in thermal expansion coefficients of each layer. Protective coating in this work means both the thermal and the environmental barrier. These coatings protect components against high temperatures and harsh environment. In this work, necessary theoretical background in the field of the thermal and environmental barrier coatings is introduced. There are mentioned some basic design approach

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Planche, Léo. "Décomposition de graphes en plus courts chemins et en cycles de faible excentricité." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCB224.

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En collaboration avec des chercheurs en biologie à Jussieu, nous étudions des graphes issus de données biologiques afin de d'en améliorer la compréhension. Ces graphes sont constitués à partir de fragments d'ADN, nommés reads. Chaque read correspond à un sommet, et deux sommets sont reliés si les deux séquences d'ADN correspondantes ont un taux de similarité suffisant. Ainsi se forme des graphes ayant une structure bien particulière que nous nommons hub-laminaire. Un graphe est dit hub-laminaire s'il peut être résumé en quelques plus courts chemins dont tous les sommets du graphe soient proche

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