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Dissertations / Theses on the topic 'Plastic dynamics'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Henao, Aristizábal Andrés. "Local ordering and dynamics of plastic crystals." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/403842.

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Many materials of scientific interest show a disordered phase, with their molecules presenting positional disorder, orientational disorder or both. Processes of interest to life also occur in these kind of phases as it is the case of liquid water present in many biochemical problems of interest such as protein folding. The study of these disordered phases is inherently difficult due to their lack of periodicity as in ordered crystals. In this work, molecular dynamics simulations (MD) are used to study two disordered phases: the liquid and the plastic crystal. The configurations obtained by M

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2

Ruan, Haihui. "Collision between two perfectly plastic beam structures : modeling and verification /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?MECH%202004%20RUAN.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2004.<br>Includes bibliographical references (leaves 235-241). Also available in electronic version. Access restricted to campus users.

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3

Rizik, Vivian. "Analysis of an elasto-visco-plastic model describing dislocation dynamics." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2505.

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Dans cette thèse on s'intéresse à l'analyse théorique et numérique de la dynamique des densités des dislocations, où les dislocations sont des défauts cristallins, apparaissant à l'échelle microscopique dans les alliages métalliques. En particulier, on considère en premier temps l'étude du modèle de Groma-Czikor-Zaiser (GCZ) et en second temps l'étude du modèle de Groma-Balog (GZ). Il s'agit en réalité d'un système d'équations de type paraboliques et de type Hamilton-Jacobi non-linéaires. Au départ, nous démontrons un résultat d'existence et d'unicité d'une solution régulière en utilisant le p

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4

Palomby, Claudio. "Dynamic deformation and perforation of ductile cylindrical shells." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257167.

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5

Jang, Seonhee. "Molecular dynamics simulations of plastic deformation in nanocrystalline metal and alloy." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-10182007-151340/.

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Nanocrystalline metals have different mechanical properties from conventional grain sized metals. Hardness and yield strength have been found to increase with decreasing grain size in the nanocrystalline regime down to at least 15 nm on the basis of Hall-Petch mechanisms. Below grain sizes of ~10 nm, the strength decreases with further grain refinement, leading to the inverse Hall-Petch effect. Although the experimental evidence has found these deformation responses in nanocrystalline materials, the underlying mechanisms are not well identified. Molecular dynamics simulations were carried out

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6

Scala, Riccardo. "A variational approach to statics and dynamics of elasto-plastic systems." Doctoral thesis, SISSA, 2014. http://hdl.handle.net/20.500.11767/3898.

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We prove some existence results for dynamic evolutions in elasto-plasticity and delamination. We study the limit as the data vary very slowly and prove convergence results to quasistatic evolutions. We model dislocations by mean of currents, we introduce the space of deformations in the presence of dislocations and study the graphs of these maps. We prove existence results for minimum problems. We study the properties of minimizers.

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7

Eren, Ahmet M. "An Elastic-plastic Beam Element." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607162/index.pdf.

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In this thesis, a two node nonlinear elastic-plastic beam finite element is developed to analyze large deformations. The system of equations are derived from virtual work principle, and the updated Lagrangian formulation is used. Material is assumed to be isotropic and rate insensitive obeying J2-flow rule. Work hardening characteristics of material is considered and all nonlinear terms are included. For the two node iso-parametric beam element a layered model is used to analyze through-the-thickness distribution of elastic and plastic zones. A finite element program is developed and the numer

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8

TOUFIGH, MOHAMMAD MOHSEN. "BEHAVIOR OF UNSATURATED SOIL AND ITS INFLUENCE ON SOIL - SOIL INTERACTION AT AN INTERFACE." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184224.

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The interface failure between caps and natural soil in trenches containing buried low level nuclear waste material was investigated in this study. The Casa Grande Highway Farm (CGHF) soil was used for the entire investigation. This soil is described as being a silty sand with approximately 23% by weight passing sieve No. 200. Other preliminary testing was performed on the same soil. Isotropically consolidated drained (CID) tests were performed on the laboratory compacted samples at different degree of saturation including fully saturated specimens. Suction pressure was measured in the laborato

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9

Хоменко, Олексій Віталійович, Алексей Витальевич Хоменко, Oleksii Vitaliiovych Khomenko, et al. "Modeling of phase dynamics and kinetics of fragmentation at severe plastic deformation." Thesis, Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна Національної академії наук України, 2015. http://essuir.sumdu.edu.ua/handle/123456789/41631.

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10

Joste, Baptiste. "Simulation of plastic strain localization by Discrete Dislocation Dynamics and crystal plasticity." Electronic Thesis or Diss., Université Paris sciences et lettres, 2023. http://www.theses.fr/2023UPSLM077.

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Comprendre les processus de déformation conduisant à la défaillance des matériaux polycristallins est l'un des principaux défis de la science des matériaux. A ce jour, les mécanismes de localisation de la déformation plastique en bandes de glissement et la propagation de la déformation à travers un agrégat polycristallin ne sont pas entièrement compris. L'investigation de tels phénomènes est l'objectif du projet ANR 3DiPolyPlast. Dans l'approche de simulation multi-échelles proposée, des simulations de Dynamique des Dislocations Discrètes (DDD) seront utilisées afin de mieux modéliser le compo

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11

Liu, Xinhe. "Implementation of dynamical systems with plastic self-organising velocity fields." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/19550.

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To describe learning, as an alternative to a neural network recently dynamical systems were introduced whose vector fields were plastic and self-organising. Such a system automatically modifies its velocity vector field in response to the external stimuli. In the simplest case under certain conditions its vector field develops into a gradient of a multi-dimensional probability density distribution of the stimuli. We illustrate with examples how such a system carries out categorisation, pattern recognition, memorisation and forgetting without any supervision.

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12

Kuhr, Bryan Richard. "Modeling the Role of Surfaces and Grain Boundaries in Plastic Deformation." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78704.

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In this dissertation, simulation techniques are used to understand the role of surfaces and grain boundaries in the deformation response of metallic materials. This research utilizes atomistic scale modeling to study nanoscale deformation phenomena with time and spatial resolution not available in experimental testing. Molecular dynamics techniques are used to understand plastic deformation of grain boundaries and surfaces in metals under different configurations and loading procedures. Stress and strain localization phenomena are investigated at plastically deformed boundaries in axially st

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13

Martínez, García Julio César. "Dynamics in orientationally disordered solids." Doctoral thesis, Universitat Politècnica de Catalunya, 2011. http://hdl.handle.net/10803/35856.

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The key features of dynamics of ultraslowing glass forming systems are their universality in diversity. Its origin is recognized as one of the greatest challenges of condensed matter physics and materials engineering in the XXI century. Similar phenomena are observed on approaching the glass transition in low molecular weight supercooled liquids, polymers, colloidal fluids as well as in solids, for instance in orientationally disordered crystals, spin glass-like magnetic, vortex glasses. Pre-vitreous dynamics is also proposed as a general reference for the category of complex liquids/soft

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14

Zelazny, Mateusz Aleksander. "An investigation into vibrational dynamics in organic semiconductors." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/284209.

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This thesis is concerned with study of vibrational dynamics and their effect on charge transport in thin films of organic semiconductors. Two classes of organic semiconductors are investigated- crystalline small molecules and conjugated polymers. Although device performance of both classes of materials has greatly improved over last two decades, detailed understanding of relationship between structure and transport properties is still missing- so far development of organic semiconductors has mostly been based on experimental approach, with theoretical models providing post factum justification

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15

Avallone, Niccolo. "Hydrogen dynamics in solids : quantum diffusion and plastic phase transition in hydrates under pressure." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS622.

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Les simulations à l'échelle atomique des hydrates d'ammoniac posent des défis théoriques et numériques majeurs pour plusieurs raisons. La description de systèmes désordonnés et/ou frustrés nécessite des simulations à grande échelle (plusieurs milliers d'atomes sur des échelles de temps de l'ordre de la nanoseconde). Ceci rend impossible l'utilisation de méthodes ab initio pour décrire les interactions interatomiques. La présence d’hydrogène induit une grande complexité du diagramme de phase. Les propriétés spécifiques des liaisons hydrogène entre les molécules d'eau et d'ammoniac expliquent la

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16

Mohammad, Davoudi Kamyar. "Plastic Behavior of Polycrytalline Thin Films: Discrete Dislocation Study." Thesis, Harvard University, 2014. http://dissertations.umi.com/gsas.harvard:11634.

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Explaining the work-hardening behavior of crystalline materials and the size dependent plasticity has been a long lasting problem. Plastic deformation mainly arises from the collective motion of dislocations. Although individual dislocation processes are well studied, the study of the overall effects of these processes was challenging before the emergence of computer modeling. Of the computer simulation techniques, discrete dislocation dynamics (DDD) is the most suitable method to model thin films at the micron scale and below. This method allows us to study the quantitative effects of certa

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17

HASHMI, QUAZI SARWAR EHSAN. "NONASSOCIATIVE PLASTICITY MODEL FOR COHESIONLESS MATERIALS AND ITS IMPLEMENTATION IN SOIL-STRUCTURE INTERACTION." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184024.

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A constitutive model based on rate-independent elastoplasticity concepts is developed and used to simulate the behavior of geologic materials under arbitrary three-dimensional stress paths. The model accounts for various factors such as friction, stress path and stress history that influence the behavior of geologic materials. A hierarchical approach is adopted whereby models of progressively increasing sophistication are developed from a basic isotropic-hardening associative model. Nonassociativeness is introduced as correction or perturbation to the basic model. Deviation of normality of the

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18

GALAGODA, HERATH MAHINDA. "NONLINEAR ANALYSIS OF POROUS SOIL MEDIA AND APPLICATION (PORE PRESSURE, TIME INTEGRATION, FINITE ELEMENTS)." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183913.

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The behavior of porous media subjected to any arbitrary loading is a complex phenomenon due to the coupled nature of the problem. Proper understanding of this coupled behavior is essential in dealing with many of the geotechnical engineering problems. A very general three-dimensional formulation of such a coupled problem was first reported by Biot; however, a two-dimensional idealization of the theory is used here with extension to nonlinear material behavior. A finite element computer code is developed to analyze the response of coupled systems subjected to both static and dynamic excitations

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19

GATTI, RICCARDO. "Modeling elastic and plastic relaxation in silicon-germanium heteroepitaxial nanostructures." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/18965.

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My Ph. D. work led to the development of numerical methods devoted to the study of elastic and plastic relaxation in SiGe/Si (001) heteroepitaxial nanostructures. The meth- ods were successfully applied to the study of self-assembled nanostructures arising from the heteroepitaxial growth of Ge (or SiGe alloys) on Si substrate (three dimensional islands and thin films). First of all, I studied the mechanisms allowing for elastic relaxation. Tuning the initial condition, it was possible to calculate with Finite Element Method the elas- tic field in SiGe islands. Then the variation of composition

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20

Tarleton, Edmund. "Dislocation-dynamics modelling of crack-tip plastic zones and brittle-ductile transitions in BCC metals." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526123.

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21

Gascoyne, Daniel T. "Learning and recognition by a dynamical system with a plastic velocity field." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/20101.

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Learning is a mechanism intrinsic to all sentient biological systems. Despite the diverse range of paradigms that exist, it appears that an artificial system has yet to be developed that can emulate learning with a comparable degree of accuracy or efficiency to the human brain. With the development of new approaches comes the opportunity to reduce this disparity in performance. A model presented by Janson and Marsden [arXiv:1107.0674 (2011)] (Memory foam model) redefines the critical features that an intelligent system should demonstrate. Rather than focussing on the topological constraints of

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22

Srivastava, Kinshuk [Verfasser], and P. [Akademischer Betreuer] Gumbsch. "Atomistically-informed discrete dislocation dynamics modeling of plastic flow in body-centered cubic metals / Kinshuk Srivastava. Betreuer: P. Gumbsch." Karlsruhe : KIT-Bibliothek, 2014. http://d-nb.info/1054989516/34.

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23

Smith, Laura Anne Patrick. "Atomistic Molecular Dynamics Studies of Grain Boundary Structure and Deformation Response in Metallic Nanostructures." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/47802.

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The research reported in this dissertation focuses on the response of grain boundaries in polycrystalline metallic nanostructures to applied strain using molecular dynamics simulations and empirical interatomic force laws. The specific goals of the work include establishing how local grain boundary structure affects deformation behavior through the quantitative estimation of various plasticity mechanisms, such as dislocation emission and grain boundary sliding. The effects of strain rate and temperature on the plastic deformation process were also investigated. To achieve this, molecular dynam

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24

Lin, Yuh-Luen [Verfasser]. "Plastic Shape Functions of Plate Systems : Reducing modal DOF for stochastic nonlinear dynamics of large scale plate systems / Yuh-Luen Lin." Aachen : Shaker, 2012. http://d-nb.info/1067736573/34.

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25

Kidd, Bryce Edwin. "Multiscale Transport and Dynamics in Ion-Dense Organic Electrolytes and Copolymer Micelles." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/82525.

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Understanding molecular and ion dynamics in soft materials used for fuel cell, battery, and drug delivery vehicle applications on multiple time and length scales provides critical information for the development of next generation materials. In this dissertation, new insights into transport and kinetic processes such as diffusion coefficients, translational activation energies (Ea), and rate constants for molecular exchange, as well as how these processes depend on material chemistry and morphology are shown. This dissertation also aims to serve as a guide for material scientists wanting to ex

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26

Hosseinzadeh, Delandar Arash. "Numerical Modeling of Plasticity in FCC Crystalline Materials Using Discrete Dislocation Dynamics." Licentiate thesis, KTH, Materialteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175424.

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Plasticity in crystalline solids is controlled by the microscopic line defects known as “dislocations”. Decisive role of dislocations in crystal plasticity in addition to fundamentals of plastic deformation are presented in the current thesis work. Moreover, major features of numerical modeling method “Discrete Dislocation Dynamics (DDD)” technique are described to elucidate a powerful computational method used in simulation of crystal plasticity. First part of the work is focused on the investigation of strain rate effect on the dynamic deformation of crystalline solids. Single crystal copper

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27

Chi, Ma. "Improving the Plasticity of Metallic Glass through Heterogeneity Induced by Electropulsing-assisted Surface Severe Plastic Deformation." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1555595868348676.

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28

Occelli, Matthieu. "Explicit dynamics isogeometric analysis : lr b-splines implementation in the radioss solver." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI102/document.

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L'analyse isométrique s'est révélée être un outil très prometteur pour la conception et l'analyse. Une tâche difficile consiste toujours à faire passer l'IGA de concept à un outil de conception pratique pour l'industrie et ce travail contribue à cet effort. Ce travail porte sur l'implémentation de l'IGA dans le solveur explicite Altair Radioss afin de répondre aux applications de simulation de crash et d'emboutissage. Pour cela, les ingrédients nécessaires à une intégration native de l'IGA dans un code éléments finis traditionnel ont été identifiés et adaptés à l'architecture de code existante

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29

Merendino, Edy Maicon. "Estudo de processo de reciclagem do composto de polietileno e alumínio proveniente de embalagens cartonadas assépticas através de simulação computacional usando o método dos elementos discretos (DEM)." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266814.

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Orientador: José Roberto Nunhez<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-19T14:59:08Z (GMT). No. of bitstreams: 1 Merendino_EdyMaicon_M.pdf: 4244405 bytes, checksum: c56623b83b7e229872966885f5e9eca5 (MD5) Previous issue date: 2011<br>Resumo: As embalagens cartonadas assépticas para alimentos são comuns em nosso dia-a-dia. Tais embalagens são compostas por três materiais: papel, polietileno de baixa densidade e alumínio. Seu processo de reciclagem se dá em duas etapas sucessivas: a reciclagem do papel

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30

Bläckberg, Lisa. "Surface Coatings as Xenon Diffusion Barriers for Improved Detection of Clandestine Nuclear Explosions." Doctoral thesis, Uppsala universitet, Materialteori, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-215562.

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This thesis investigates surface coatings as xenon diffusion barriers on plastic scintillators. The motivation for the work is improved radioxenon detection systems, used within the verification regime of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). One type of radioxenon detection systems used in this context is the Swedish SAUNA system. This system uses a cylindrical plastic scintillator cell to measure the beta decay from radioxenon isotopes. The detector cell also acts as a container for the xenon sample during the measurement. One problem with this setup is that part of the xenon sam

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31

Hassani, Sayed Muhammad Reza [Verfasser], Fathollah [Gutachter] Varnik, and Ingo [Gutachter] Steinbach. "Shear banding in amorphous solids : from correlations of local plastic deformation to percolating shear bands ; a molecular dynamics study / Sayed Muhammad Reza Hassani ; Gutachter: Fathollah Varnik, Ingo Steinbach ; Fakultät für Maschinenbau." Bochum : Ruhr-Universität Bochum, 2019. http://d-nb.info/1195221436/34.

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Liu, Jianhui. "Dynamic behaviour of rigid-plastic beams." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.480541.

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33

Poláček, Milan. "Optimalizace parametrů dynamické relaxace při řešení mezních plastických stavů konstrukcí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226797.

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The aim of the thesis is to create an analytical model of frame construction. Determining load at which individual plastic hinges are formed until the collapse of the structure. The analysis is going to be performed by RFEM with an additional module RFDYNAM. Subsequently, the parameters of dynamic relaxation is going to be optimized to specify and speed up the calculations. Finally, the optimized parameters is going to be used to analyze the storeyed frame construction formed Ing. Jan Vales including a comparison of findings.

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Valeš, Jan. "Počítačová simulace kolapsu budovy zplastizováním kloubů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225731.

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The aim of the thesis is to create an analytical 2D model of a multi-storey building and its consequent loading until the point of collapse which occures due to formation of plastic hinges. The first part is going to present a linear analysis of the problem; it focuses on location and level of load when the plastic hinges are formed. Then a nonlinaer analysis is going to be performed by RFEM programme using postcritical analysis and dynamic relaxation. Differences between the results of mentioned types and methods of analysis are going to be compared and an impact of variables is going to be e

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Corbani, Silvia. "Análise dinâmica elasto-plástica de estruturas metálicas sujeitas a excitação aleatória de sismos." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3144/tde-13032007-092337/.

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Ações sísmicas ocorrem com pouca freqüência e intensidade no Brasil, porém ocorrem em países da América Latina situados na costa do Pacífico e em Portugal, despertando o interesse da engenharia brasileira nesse assunto. Neste trabalho, apresenta-se um modelo numérico para análise de estruturas metálicas aporticadas planas com comportamento elasto-plástico sob excitação aleatória induzida por sismos. Para simular as vibrações aleatórias, utiliza-se uma simulação tipo Monte Carlo fundamentada no ?Vento Sintético?, proposta pelo Prof. Mário Franco. Nessa simulação, combinações de séries de carreg

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Vaziri, Reza. "Finite deflection dynamic analysis of rigid-plastic beams." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25142.

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An analytical procedure, which retains the influence of finite deflections, is developed herein for the dynamic behaviour of rectangular shaped rigid-plastic beams. In the general formulation of the problem deformation is assumed to proceed under two distinct mechanisms depending on the extent to which the value of the peak pressure exceeds the static collapse pressure of the beam. These mechanisms are described by kinernatically admissible velocity fields that satisfy the appropriate continuity conditions. The governing equations of motion are derived from a variational statement consisting

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Lam, Ying. "Quantification of dynamic mixing characteristics during polymer extrusion." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36540869.

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Korzeczek, Laurent. "Modélisation mésoscopique en 3D par le modèle Discret-Continu de la stabilité des fissures courtes dans les métaux CFC." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC049/document.

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Le mode de propagation complexe des fissures courtes observé dans les métaux ductiles sous chargement cyclique est généralement attribué à différents mécanismes de stabilisation intervenant à l’échelle de la microstructure, l’échelle mésoscopique. Parmi ces mécanismes, l’interaction de la fissure avec la microstructure de dislocation semble jouer un rôle majeur. La dynamique des dislocations contrôle la déformation plastique et le transfert de chaleur qui lui est associé et réduit ainsi la quantité d’énergie élastique stockée dans le matériau. De plus, la microstructure de dislocations peut «

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Kasinos, Stavros. "Seismic response analysis of linear and nonlinear secondary structures." Thesis, Loughborough University, 2018. https://dspace.lboro.ac.uk/2134/33728.

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Understanding the complex dynamics that underpin the response of structures in the occurrence of earthquakes is of paramount importance in ensuring community resilience. The operational continuity of structures is influenced by the performance of nonstructural components, also known as secondary structures. Inherent vulnerability characteristics, nonlinearities and uncertainties in their properties or in the excitation pose challenges that render their response determination as a non-straightforward task. This dissertation settles in the context of mathematical modelling and response quantific

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Breuers, Frederique [Verfasser]. "The dynamics of plastid membrane systems / Frederique Breuers." München : Verlag Dr. Hut, 2013. http://d-nb.info/1042307989/34.

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Kihlander, Jesper. "Finite Element simulation of vibrating plastic components." Thesis, Linköpings universitet, Hållfasthetslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-89984.

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For automotive plastic parts there is a clear demand on an increased quality of the FE models. This demand is related to the increased use of simulations, both due to a reduced number of prototypes and an increased number of load cases. There have been studies showing a change of dynamic properties in injection molded components. The conclusion from these studies are that the change depends on residual stresses built in during the injection process. This study use simple models to try to get a working method and from the results find out the basic relations between residual stresses and dynami

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Gomes, Vincent G. (Vincent Gracias). "The dynamics and control of melt temperature in thermoplastic injection molding /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65921.

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Khan, Azam. "Behaviour of rigid plastic structures under extreme dynamic loading." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501756.

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Lam, Ying, and 林瀅. "Quantification of dynamic mixing characteristics during polymer extrusion." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B36540869.

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Bravo, Victor. "Finite element simulation of flow in twin screw extruder mixing elements." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0005/NQ42727.pdf.

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46

Griffiths, Robert Joseph. "Dynamic and Post-Dynamic Microstructure Evolution in Additive Friction Stir Deposition." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/104664.

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Metal additive manufacturing stands poised to disrupt multiple industries with high material use efficiency and complex part production capabilities, however many technologies deposit material with sub-optimal properties, limiting their use. This decrease in performance largely stems from porosity laden parts, and asymmetric solidification-based microstructures. Solid-state additive manufacturing techniques bypass these flaws, using deformation and diffusion phenomena to bond material together layer by layer. Among these techniques, Additive Friction Stir Deposition (AFSD), stands out as uniq

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Saka, Kolawole. "Dynamic mechanical properties of fibre reinforced plastics." Thesis, University of Oxford, 1987. http://ora.ox.ac.uk/objects/uuid:0514854d-36db-4cc1-b377-03a75550ab76.

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Abstract:

A small gas gun, capable of accelerating a projectile 1m long by 25.4mm diameter to about 50 m/s, and an extended split Hopklnson bar apparatus have been designed and constructed for the tensile impact testing of fibre reinforced composite specimens at strain rates of the order of 1000/s. Elastic strain measurements derived from the Hopkinson bar analysis are checked, using strain gauges attached directly to the specimen and the validity of the elastic moduli determined under tensile impact is confirmed. Epoxy specimens reinforced with plain-weave fabrics of either carbon or glass or with seve

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Yeung, Richard Ching King. "Rigid-plastic finite element analysis of static and dynamic collapse." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38201.

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Holl, Mark Roland. "Dynamic analysis, measurement, and control of cell growth in solid state polymeric foams /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/7120.

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Nayfeh, Jamal Faris. "Nonlinear dynamics of composite plates and other physical systems." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135756/.

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