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Relevant bibliographies by topics / Mechanical physics - structural / Dissertations / Theses

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Dissertations / Theses on the topic 'Mechanical physics - structural'

Author: Grafiati

Published: 28 July 2024

Last updated: 31 July 2025

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1

Hudson-McAulay, Kate J. "The structural and mechanical integrity of historic wood." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7529/.

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Little is known about historic wood as it ages naturally. Instead, most studies focus on biological decay, as it is often assumed that wood remains otherwise stable with age. This PhD project was organised by Historic Scotland and the University of Glasgow to investigate the natural chemical and physical aging of wood. The natural aging of wood was a concern for Historic Scotland as traditional timber replacement is the standard form of repair used in wooden cultural heritage; replacing rotten timber with new timber of the same species. The project was set up to look at what differences could

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2

Brinster, Irina. "Multi-Objective Algorithms for Coupled Optimization of Mechanical and Electromagnetic Systems." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/528.

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Modern mobile devices incorporate several transmit and receive antennas in highly constrained volumes. As miniaturized antennas impinge upon fundamental physical limits on efficiency, new design approaches are required to support ever-smaller devices with more varied and robust communication performance. We take an unconventional design approach in which an arbitrary metallic structure and its components can be modified to act as efficient radiators. Using eigenmode analysis and the theory of characteristic modes (TCM), we develop algorithms that allow for effective integration of antennas wit

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3

Kendall, Michael James. "Experimentally simulating high rate deformation of polymers and composites." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:bc1a52f5-9f58-411b-8126-9469a4071ff2.

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The research presented in this dissertation presents a methodology to experimentally predict and simulate the mechanical behavior of polymers under high strain rate deformation. Specifically, the interplay between the effects of temperature and strain rate on polymer behavior is examined and then used as a tool to help recreate the high rate mechanical response of several different polymers: ranging from rubbers to amorphous polymers to composites. Multiple literature reviews are conducted and presented in this thesis, e.g. experimental mechanics test methods, high rate behavior, time-temperat

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4

Rabe, Karin M. (Karin Maria). "Ab initio statistical mechanics of structural phase transitions." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/14630.

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5

Guédé, Zakoua. "Approche probabiliste de la durée de vie des structures sollicités en fatigue thermique." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2005. http://tel.archives-ouvertes.fr/tel-00665715.

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Le comportement en fatigue thermique est extrêmement marqué par de nombreuses incertitudes. Le code de dimensionnement de l'industrie nucléaire, qui est particuliérement concernée par ce phénomène, prend en compte ces incertitudes en introduisant des marges de sécurité empitiques de sorte que le dimensionnement soit rendu conservatif. Toutefois, cette démarche ne permet pas de chiffrer le risque lié aux choix effectués. Il est donc intéressant d'introduire un cadre probabiliste global du dimensionnement en fatigue thermique. L'approche probabiliste du dimensionnement en fatigue thermique propo

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6

Vergnault, Étienne. "Vers une approche multi-échelle pour l'interaction fluide-structure." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2009. http://tel.archives-ouvertes.fr/tel-00661195.

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La prédiction du comportement de structures soumises au chargement d'un guide est un enjeu actuel de l'industrie aéronautique. Les matériaux composites, de plus en plus employés, ont des mécanismes de dégradation dont la taille caractéristique est inférieure au dixième de millimètre. Dans le cadre des méthodes multi-échelles développées au laboratoire pour la simulation des structures, nous proposons une méthode de décomposition de domaine mixte pour la simulation d'écoulements incompressibles. Les équations de Navier-Stokes sont écrites dans un formalisme eulérien, et résolues de manière incr

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7

Ku, Jason (Jason Stoutsenberger). "On the design of physical folded structures." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104239.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 123-128).<br>Folding as a subject of mathematical, computational, and engineering study is relatively young. Most results in this field are hard to apply in engineering practice because the use of physical materials to construct folded structures has not been fully considered nor adequately addressed. I propose a three-fold approach to the design of folded structures with physical consideration, separating for

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8

Azarkhail, Mohammadreza. "Agent autonomy approach to physics-based reliability modeling of structures and mechanical systems." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7680.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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9

Teitz, Emilie Maria. "Characterization of the Shock Wave Structure in Water." Thesis, Marquette University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10267152.

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<p> The scientific community is interested in furthering the understanding of shock wave structures in water, given its implications in a wide range of applications; from researching how shock waves penetrate unwanted body tissues to studying how humans respond to blast waves. Shock wave research on water has existed for over five decades. Previous studies have investigated the shock response of water at pressures ranging from 1 to 70 GPa using flyer plate experiments. This report differs from previously published experiments in that the water was loaded to shock pressures ranging from 0.36 to

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10

Thomson, Edward Andrew. "Schrodinger wave-mechanics and large scale structure." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2976/.

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In recent years various authors have developed a new numerical approach to cosmological simulations that formulates the equations describing large scale structure (LSS) formation within a quantum mechanical framework. This method couples the Schrodinger and Poisson equations. Previously, work has evolved mainly along two different strands of thought: (1) solving the full system of equations as Widrow & Kaiser attempted, (2) as an approximation to the full set of equations (the Free Particle Approximation developed by Coles, Spencer and Short). It has been suggested that this approach can be co

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11

He, Liangyu. "Optical surface characterization with the structure function." Thesis, The University of North Carolina at Charlotte, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3608294.

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<p> It is important to characterize surface and transmitted wavefront errors in terms of the spatial content. The errors are typically analyzed in three spatial domains: figure, ripple (or mid-spatial frequency) and roughness. These errors can affect optical system performance. For example, mid-spatial frequency errors can lead to self-focusing and power loss in a high-power laser system. Currently, power spectral density (PSD) is used for the spatial content characterization in high-end optics, although there are potential pitfalls. For example, the low spatial content is removed before calcu

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12

Sadiku, E. R. "The effect of physical ageing on the structural and mechanical characteristics of polypropylene." Thesis, University of Strathclyde, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372099.

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13

Clark, Daniel Lee Jr. "Locally Optimized Covariance Kriging for Non-Stationary System Responses." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1464092652.

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14

Lal, Raymond Ashwin. "Causal structure in categorical quantum mechanics." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:7a3230de-e28c-4907-b066-1602d2310aa1.

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Categorical quantum mechanics is a way of formalising the structural features of quantum theory using category theory. It uses compound systems as the primitive notion, which is formalised by using symmetric monoidal categories. This leads to an elegant formalism for describing quantum protocols such as quantum teleportation. In particular, categorical quantum mechanics provides a graphical calculus that exposes the information flow of such protocols in an intuitive way. However, the graphical calculus also reveals surprising features of these protocols; for example, in the quantum teleportati

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15

MURAD, JOSE ROBERTO DE LIMA. "THE PHYSICAL, MECHANICAL AND MESO-STRUCTURAL PROPERTIES OF THE BAMBOO GUADUA WEBERBAUERI OF ACRE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=10717@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>O bambu apresenta baixo consumo de energia e baixo custo de produção, além de ser um material renovável e ecológico. É um material potencialmente promissor que vem demonstrando grandes qualidades para a construção civil. Estudos mostraram que a relação resistência à tração e peso específico do bambu é 2,77 vezes maior que a do aço. Este trabalho tem como objetivo a caracterização física, mecânica e meso-estrutural do bambu da espécie Guadua weberbaueri para possível aplicação na engenharia civil como material não convencion

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16

Guo, Yuning [Verfasser]. "Theoretical Modeling of Mechanical Waves in Periodic Phononic Structures / Yuning Guo." Konstanz : Bibliothek der Universität Konstanz, 2018. http://d-nb.info/1153712652/34.

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17

Ben, jaber Nader. "Élaboration de revêtements prothétiques : Caractérisation physico-chimique, structurale et mécanique." Thesis, Reims, 2016. http://www.theses.fr/2016REIMS010/document.

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Ce travail présente un procédé innovant d’élaboration de revêtements prothétiques phosphocalciques : l’électrodéposition. Il porte sur la synthèse et la caractérisation de phosphates de calcium destinés au recouvrement de prothèses de hanche. Un protocole original a été développé en associant l’électrodéposition en mode courant pulsé à un traitement thermique sous atmosphère contrôlée appelé THUCA. La morphologie, la composition et la structure des revêtements obtenus ont été analysées respectivement par MEB, microanalyse X et diffraction des rayons X. Les résultats ont montré que nous obtenon

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18

Prévost, David. "Modélisation avancée du couple Machine Outil / Commande Numérique dans un contexte UGV pour l'optimisation du calcul de trajectoires multi axes." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2011. http://tel.archives-ouvertes.fr/tel-00764975.

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Les différentes étapes du processus d'élaboration de pièces de formes complexes sont encore aujourd'hui le siège d'erreurs et de cloisonnement entre activités qui engendrent une perte de qualité du produit réalisé et un manque de productivité. La maîtrise des écarts géométriques observés sur les surfaces usinées par exécution de trajectoires UGV sont ainsi au centre de l'étude. Afin de mieux appréhender l'apparition des défauts géométriques dans le processus, les travaux débutent par une analyse détaillée du processus, allant de la génération des trajectoires, jusqu'au comportement dynamique d

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19

Khaksar, Maryam [Verfasser]. "DNA under Hydrodynamic and Mechanical Stretching : Structure and Dynamics / Maryam Khaksar." Konstanz : Bibliothek der Universität Konstanz, 2011. http://d-nb.info/1017360510/34.

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20

Jiang, Nan. "Exploring Microtubule Structural Mechanics through Molecular Dynamics Simulations." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504878667194719.

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21

Najim, Khalid Battal. "Determination and enhancement of mechanical and thermo-physical behaviour of crumb rubber-modified structural concrete." Thesis, University of Nottingham, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.587844.

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This study aims are to i) understand and improve the bonding characteristics between crumb rubber and cement paste, and ii) scale-up the use of the material from lab to full-sized reinforced sections. Firstly a parametric investigation was conducted to determine the effect of crumb rubber replacement on the fresh, mechanical and thermo-physical properties of Plain Rubberised Concrete (PRC) and Self-compacting Rubberised Concrete (SCRC) at different w/c ratios. Secondly, the relative effects of different pre-coating/ treating methodologies were evaluated in terms of ITZ porosity, interfacial bo

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22

Belin, Boris. "Relationships between the molecular structure and the mechanical and physico-chemical properties of semicrystalline polymers." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASF097.

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Cette thèse est consacrée à l'étude des polymères semicristallins par simulation à l'échelle moléculaire. Elle s'est déroulée dans le cadre d'une collaboration entre l'entreprise Materials Design S.A.R.L., l'Institut de Chimie Physique d'Orsay, et l'IFP Energies nouvelles. Notre objectif était de fournir une méthode générale de construction d'échantillons semicristallins et de l'implémenter dans une suite logicielle puis d'utiliser cet outil pour obtenir des propriétés structurales, mécaniques et de perméabilité à de petites molécules de gaz. Les polymères semicristallins sont des matériaux da

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23

Бондар, Олександр В`ячеславович, Александр Вячеславович Бондарь, Oleksandr Viacheslavovych Bondar, et al. "Physical and Mechanical Properties of (Ti-Zr-Nb)N Coatings, Fabricated by Vacuum-Arc Deposition." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42580.

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The coatings based on (Ti-Zr-Nb)N were fabricated by vacuum-arc deposition of the Ti+Zr+Nb cathodes in the nitrogen atmosphere. Their physical and mechanical properties as well as tribological characteristics have been studied. The coatings are characterized by a columnar structure, their hardness reaches 44.57 GPa. The adhesion strength of coatings reaches 66.77 GPa, the friction coefficient of the «cover – Al2O3» is 1.1. It has been determined, that the hardness of the investigated coatings significantly depends on the pressure of the reaction gas. The coatings are promising as protecti

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24

Кравченко, Ярослав Олегович, Ярослав Олегович Кравченко, and Yaroslav Olehovych Kravchenko. "Structure and physical-mechanical properties of nitride and carbide coatings obtained with magnetron sputtering." Thesis, Sumy State University, 2016. http://essuir.sumdu.edu.ua/handle/123456789/46981.

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It has been found that the vanadium compounds have a coefficient of friction lower than the control samples HSS, the lowest values were determined for the vanadium carbide (μ = 0.5-0.56). The wear mechanism changes from a cohesive wear, in the case of vanadium carbide monolayer, to an abrasive wear mechanism in the case of vanadium multilayer structures. Although vanadium carbide has the highest microhardness, its wear resistance is not so good, but when the VN is reinforced with the VC layer, the wear resistance increases significantly.

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25

Ulian, Gianfranco <1985&gt. "Ab initio quantum mechanical investigation of structural and chemical-physical properties of selected minerals for minero-petrological, structural ceramic and biomaterial applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6475/1/Ulian_Gianfranco_Tesi.pdf.

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The purpose of this thesis is the atomic-scale simulation of the crystal-chemical and physical (phonon, energetic) properties of some strategically important minerals for structural ceramics, biomedical and petrological applications. These properties affect the thermodynamic stability and rule the mineral-environment interface phenomena, with important economical, (bio)technological, petrological and environmental implications. The minerals of interest belong to the family of phyllosilicates (talc, pyrophyllite and muscovite) and apatite (OHAp), chosen for their importance in industrial and bi

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Ulian, Gianfranco <1985&gt. "Ab initio quantum mechanical investigation of structural and chemical-physical properties of selected minerals for minero-petrological, structural ceramic and biomaterial applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6475/.

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The purpose of this thesis is the atomic-scale simulation of the crystal-chemical and physical (phonon, energetic) properties of some strategically important minerals for structural ceramics, biomedical and petrological applications. These properties affect the thermodynamic stability and rule the mineral-environment interface phenomena, with important economical, (bio)technological, petrological and environmental implications. The minerals of interest belong to the family of phyllosilicates (talc, pyrophyllite and muscovite) and apatite (OHAp), chosen for their importance in industrial and bi

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27

Prozorova, M. S., O. V. Kolisnishenko, M. G. Kovaleva, M. Yu Arseenko, and Yu N. Tyurin. "Structure and the Physico-Mechanical Properties of the Ceramic Coatings Obtained by the Cumulative -Detonation Device." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35467.

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Dense, with good adhesion to the substrate, hard, wear-resistant coatings from the powder of Al2O3 were obtained on the surface of the steel (STE255) by using the cumulative-detonation device. The results of investigations of the structure and physico-mechanical properties of the coatings by using scanning, optical microscopy, X-ray phase analysis, microhardness and tribological tests are presented. It was found that optimization of plasma spraying to helps reduce the porosity of coatings of Al2O3 less than 1 % and to increase the hardness of them to 1250 HV0.3. The tribological investiga

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28

Liang, Hua. "Structures and mechanical properties of single macromolecules at surfaces." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17301.

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Drei ausgewählt makromolekulare Systeme: DNA, amphiphile Block-Bürstenpolymere, und amphiphile, hyperverzweigte Polyglycerine wurden untersucht, um die Zusammenhang zwischen Struktur, Eigenschaften, und potentiellen Anwendung auf der Ebene einzelner Moleküle zu widmen. Unterschiedliche DNA Konformationen: (i) supercoiled DNA, (ii) gestreckte doppelsträngige DNA, die teilweise in zwei Einzelstränge aufgeschmolzen ist, (iii) DNA mit einem überdehnten Rückgrat, (iv) entspannter, ungedehnter Ring und (v) kompaktes Knäuel wurden untersucht, um direkt DNA Konformationen mit mechanischen Eigensc

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29

Higgins, Daniel Louis. "The response of metals with different crystal structures to high strain rate loading and other mechanical tests." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7724/.

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The effect of cold-rolling prior to shock loading was investigated in copper and tantalum. Annealed copper was shocked at a peak pressure of 5.08GPa; cold-rolled copper was shocked at peak pressures of 5.87GPa, 5.96GPa and 9.60GPa; as-received tantalum was shock loaded at a peak pressure of 7.20GPa, and cold-rolled tantalum was shocked at a peak pressure of 7.20GPa. The microstructures of the materials were investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the mechanical responses were investigated using compression and hardness testing. The

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30

Nagai, Toshiki. "Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems." Thesis, University of Colorado at Boulder, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10844711.

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<p> This thesis presents a space-time extended finite element method (space-time XFEM) based on the Heaviside enrichment for transient problems with moving interfaces, and its applications to the fluid-structure interaction (FSI) analysis. The Heaviside-enriched XFEM is a promising method to discretize partial differential equations with discontinuities in space. However, significant approximation errors are introduced by time stepping schemes when the interface geometry changes in time. The proposed space-time XFEM applies the finite element discretization and the Heaviside enrichment in both

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31

Pant, Sudeep Raj. "Mathematical and physical modelling of crack growth near free boundaries in compression." University of Western Australia. School of Civil and Resource Engineering, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0139.

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[Truncated abstract] The fracture of brittle materials in uniaxial compression is a complex process with the development of cracks generated from initial defects. The fracture mechanism and pattern of crack growth can be altered considerably by the presence of a free surface. In proximity of a free surface, initially stable cracks that require an increase in the load to maintain the crack growth can become unstable such that the crack growth maintains itself without requiring further increase in the load. This leads to a sudden relief of accumulated energy and, in some cases, to catastrophic

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32

Mazzone, Andrea. "Deformable mechanical structure for physical generation of objects and provision of wide area haptic feedback /." [S.l.] : [s.n.], 2005. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=15794.

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Grammes, Thilo [Verfasser], Delia S. [Gutachter] Brauer, and Joachim [Gutachter] Deubener. "Structure and mechanical properties of aluminosilicate glasses / Thilo Grammes ; Gutachter: Delia S. Brauer, Joachim Deubener." Jena : Friedrich-Schiller-Universität Jena, 2020. http://d-nb.info/120732017X/34.

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34

Vincent, Manet. "Méthodes d'analyse par éléments finis des contraintes aux interfaces dans les structures sandwich." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 1998. http://tel.archives-ouvertes.fr/tel-00663078.

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Le but de ce travail est de développer des outils par éléments finis permettant de calculer des structures sandwich sans ajouter aucune autre hypothèse que celle, très générale, de l'élasticité linéaire. Deux voies ont été suivies dans ce travail. Tout d'abord, nous exposons comment développer des éléments finis hybrides, dans lesquels les contraintes aux interfaces entre les différentes couches sont obtenues par l'intermédiaire de multiplicateurs de Lagrange. Des éléments 2D et 3D, basés sur le principe du travail virtuel et sur la fonctionnelle de Pian et Tong sont développés et validés. Ens

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35

Sriram, P. "Whole field optical methods for structural mechanics : digital speckle correlation and laser Doppler velocimetry." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/11751.

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Hu, Zhonghan. "Transport properties, optical response and slow dynamics of ionic liquids." Diss., University of Iowa, 2007. http://ir.uiowa.edu/etd/160.

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Ramakrishnan, S. 1964. "Micro-structure in particulate media: A lattice type approach." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/291671.

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The behavior of particulate media, in contrast to the behavior of continuous media, is governed by the interaction of particles/grains at contacts. The current approach to model particulate media is through a disc model assembly composed of rigid discs linked by normal and tangential springs at contacts. In this project, a novel approach using a lattice type model is investigated. The mathematical concepts related to the formulation of the lattice model are developed and are numerically implemented by a computer code. Numerical experiments were conducted on a two dimensional assembly of sphere

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38

Dowse, George Patrick. "Selected mechanical properties and the structural grading of young Pinus patula sawn timber." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5341.

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Thesis (MScFor (Dept. of Forest and Wood Science)--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: In this study 1345 pieces of 38x114 mm timber sawn from 16-20 year-old Pinus patula trees were obtained from a wide variety of sites along the Mpumalanga escarpment in South Africa. The samples were tested for various mechanical and physical properties. The objectives of this study were (1) to determine the variation in the bending strength, tension strength, and stiffness of the sawn timber, (2) to assess the efficiency of the current visual and mechanical grading rules on this sample, an

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Schrof, Susanne. "Multimodal structural, compositional, and mechanical characterization of cortical bone on the micron scale." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18076.

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Schlüsselfaktoren der bemerkenswerten mechanischen Eigenschaften von Knochen sind seine komplexe hierarchische Struktur und chemische Zusammensetzung. Ziel dieser Dissertation war die simultane Untersuchung von Materialkomposition und 3D Struktur in Relation zu lokalen elastischen Eigenschaften von Knochengewebe unter Verwendung von neuen hochauflösenden experimentellen Konzepten. Im ersten Teil wurde polarisierte Raman Spektroskopie (PRS) eingesetzt um gesunden humanen kortikalen Knochen zu analysieren. Es konnte gezeigt werden, dass sich PRS eignet, um sowohl die chemische Zusammensetzung a

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Jus, Yoann. "Modélisation et simulation numérique de vibrations induites par écoulements autour d'obstacles cylindriques seuls ou en réseaux." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00824639.

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Le travail engagé dans cette thèse s'inscrit dans le cadre de programmes de recherche engagés par les industriels du domaine nucléaire visant à optimiser les capacités prédictives des modèles de dimensionnement de composants de centrales nucléaires. La modélisation de l'action exercée par le fluide en écoulement et de la rétroaction induite par la dynamique de la structure est un élément clef du dimensionnement. L'objectif de la thèse est de mettre en évidence l'interaction entre la turbulence proche paroi et les effets de couplage instationnaire non conservatif potentiellement déstabilisant.

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Burgers, Agnès. "Caractérisations physico-mécaniques de bois "sans défauts" pour la conception mécanique : application aux pins de la région méditerranéenne française." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTS014/document.

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L’utilisation des bois pour des usages structuraux en ingénierie mécanique, sous forme de bois massifs ou éléments reconstitués, suppose une bonne connaissance des propriétés des composants bois élémentaires utilisés. Faute de cela, les bois restent exclus du monde moderne de la conception mécanique.En Languedoc-Roussillon, les pins constituent la ressource forestière principale (30 % des bois sur pieds). La valorisation de cette ressource est un enjeu majeur pour l’interprofession de la filière bois. L’objectif de ce travail de thèse est d’examiner la possibilité de prédire les propriétés de

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Rodriguez, Garcia Javier. "Etude numérique des méthodes de relaxation dynamique et contribution à la modélisation des gilets de sauvetage gonflables." Phd thesis, Université de Bretagne Sud, 2011. http://tel.archives-ouvertes.fr/tel-00659669.

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La Relaxation Dynamique (RD) est une méthode numérique présentée en 1965 par A.S. Day dans l'ouvrage "The Engineer". Depuis 1983, avec les travaux présentés par P. Underwood, la méthode est de plus en plus utilisée. Depuis ces travaux fondateurs, la méthode de RD a trouvé de nombreuses applications, et plusieurs auteurs ont introduit différentes améliorations de la méthode en cherchant l'optimisation des calculs. Désormais, son utilisation s'est largement étendue aux domaines tels que la dynamique des structures (particulièrement la recherche de forme), la geomécanique ou la biomécanique. Dans

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Souza, de Almeida Jailton. "Designing and Tuning the Properties of Materials by Quantum Mechanical Calculations." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6923.

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Colman, Ewan. "Structure and dynamics of evolving complex networks." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/9208.

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The analysis of large disordered complex networks has recently received enormous attention motivated by both academic and commercial interest. The most important results in this discipline have come from the analysis of stochastic models which mimic the growth and evolution of real networks as they change over time. The purpose of this thesis is to introduce various novel processes which dictate the development of a network on a small scale, and use techniques learned from statistical physics to derive the dynamical and structural properties of the network on the macroscopic scale. We introduc

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Sergentu, Dumitru-Claudiu. "Géométries, electronic structures, and physico-chemical porperties of astatine species : an application of relativistic quantum mechanics." Thesis, Nantes, 2016. http://www.theses.fr/2016NANT4024/document.

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Les tentatives menées pour détruire des cellules cancéreuses avec les agents radiothérapeutiques à base de 211 At qui ont été synthétisés jusqu’à présent ne sont pas encore pleinement satisfaisantes car elles sont entachées par une deastatination in vivo. Étant donné que ce problème est lié aux connaissances actuelles qui sont limitées concernant la chimie de base de l’astate et de ses espèces, des recherches fondamentales combinant des expériences à l’échelle des ultra-traces et des études théoriques ont été lancées. Dans cette thèse, une étude théorique de plusieurs espèces de l’astate est r

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Poupardin, Adrien. "Dynamique tourbillonnaire - Application à l'impact environnemental de structures immergées." Phd thesis, Université du Havre, 2012. http://tel.archives-ouvertes.fr/tel-00832174.

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L'étude de la dynamique tourbillonnaire autour des structures immergées dans la mer est entreprise pour comprendre l'impact de ces implantations sur l'environnement. Les tourbillons sont étudiés en considérant l'interaction entre une plaque horizontale et une houle monochromatique. Cette houle est générée dans un canal à houle vitré possédant un batteur et une plage d'amortissement. La Vélocimétrie par Image de Particule (PIV) et la Stéréo-Vidéographie sont utilisées pour suivre les tourbillons dans leur évolution. La PIV, qui est une technique de visualisation 2D, a permis de montrer que les

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Neukirch, Sebastien. "Enroulement, contact et vibrations de tiges élastiques." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2009. http://tel.archives-ouvertes.fr/tel-00667562.

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Ce mémoire présente plusieurs études sur l'équilibre, la stabilité et les vibrations de poutres élastiques en grande rotation. Le modèle utilisé est d'abord présenté de deux manières différentes : les équations de Kirchhoff sont introduites (i) comme une théorie directe de Cosserat, (ii) par une approche asymptotique 3D->1D. Une étude relativement complète des équilibres avec et sans auto-contact d'une poutre sous contrainte de tension et torsion et encastrée en ses deux extrémités est ensuite exposée. Le modèle est d'autre part appliqué au sur-enroulement de la molécule d'ADN et aux expérienc

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Pommier, Benjamin. "Détermination de la réponse asymptotique d'une structure anélastique soumise à un chargement thermomécanique cyclique." Phd thesis, Ecole Polytechnique X, 2003. http://pastel.archives-ouvertes.fr/pastel-00004229.

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Dans le cadre du dimensionnement à la fatigue thermomécanique des culasses automobiles, nous proposons une méthode de simulation des structures soumises à des chargements cycliques. Cette méthode, alternative aux méthodes classiques (comme la méthode incrémentale) permet de résoudre des problèmes thermomécaniques cycliques non-linéaires. Il s'agit d'une Méthode Cyclique Directe qui consiste à rechercher directement la solution asymptotique d'une structure anélastique soumise à un chargement thermomécanique périodique, sans suivre l'histoire du chargement. Elle est fondée sur les techniques de

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Kreiner, Laura [Verfasser], and Christoph [Akademischer Betreuer] Becher. "Interactions between a colour centre, optical and mechanical resonator modes in a diamond structure / Laura Kreiner ; Betreuer: Christoph Becher." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2017. http://d-nb.info/1152094521/34.

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Kreiner, Laura Verfasser], and Christoph [Akademischer Betreuer] [Becher. "Interactions between a colour centre, optical and mechanical resonator modes in a diamond structure / Laura Kreiner ; Betreuer: Christoph Becher." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:291-scidok-ds-269052.

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