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Dissertations / Theses on the topic 'Material Constitutive Model'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Mei, Zhu. "Structural hybrid simulation with model updating of material constitutive model." Doctoral thesis, Università degli studi di Trento, 2018. https://hdl.handle.net/11572/368550.

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When hybrid simulation (HS) with substructures is employed for assessing the seismic behavior of a large complex structure, it is unrealistic to test all the components that may exhibit strong nonlinearity. Hence, the accuracy of the numerical substructure (NS) faces an increased challenge. To this end, this paper will emphasize on improving the accuracy of the NS in hybrid simulation based on the model updating approach. Most hybrid simulations with model updating (UHS) focus on updating the parameters of the component constitutive model (story shear model) leading to large modeling errors an

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2

Mei, Zhu. "Structural hybrid simulation with model updating of material constitutive model." Doctoral thesis, University of Trento, 2018. http://eprints-phd.biblio.unitn.it/2959/1/TESI_ZHU_MEI.pdf.

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When hybrid simulation (HS) with substructures is employed for assessing the seismic behavior of a large complex structure, it is unrealistic to test all the components that may exhibit strong nonlinearity. Hence, the accuracy of the numerical substructure (NS) faces an increased challenge. To this end, this paper will emphasize on improving the accuracy of the NS in hybrid simulation based on the model updating approach. Most hybrid simulations with model updating (UHS) focus on updating the parameters of the component constitutive model (story shear model) leading to large modeling errors an

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3

Liu, Rui. "A unified constitutive material model with application to machining." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53097.

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Finite element simulation of metal cutting processes offers a cost-effective method to optimize the cutting conditions and to select the right tool material and geometry. A key input to such simulations is a constitutive model that describes material behavior during severe plastic deformation. However, the vast majority of material models used in prior work are phenomenological in nature and are usually obtained by fitting a non-physically based mathematical equation to the macro-scale stress-strain response of the material. Moreover, the deformation range covered by the stress-strain response

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4

Rajasekaran, Nepolean. "A Nonlinear Constitutive Model for High Density Polyethylene at High Temperature." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1298041213.

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5

Chen, Baixi. "Gaussian Process Regression-Based Data-Driven Material Models for Stochastic Structural Analysis." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/28827.

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The data-driven material models have attracted many researchers recently, as they could directly use material data. However, there are limited studies about material uncertainty in previous data-driven models. This thesis proposes a new Gaussian Process Regression (GPR)-based approach to capture the material behaviour and the associated material uncertainty from the dataset. The GPR approach is firstly used for the nonlinear elastic behaviour. The obtained GPR-based model is verified by the material datasets. Then, an improved GPR model, called the Heteroscedastic Sparse Gaussian Process Regr

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6

Soudah, Majd Ali Saleh. "MODELING AND CHARACTERIZATION OF A GENERAL MULTIMECHANISM MATERIAL MODEL FOR ADVANCED ENGINEERING APPLICATIONS OF PRESSURE SENSITIVE MATERIALS." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1627665516400485.

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7

Samtani, Nareshkumar Chandan. "Constitutive modeling and finite element analysis of slowly moving landslides using hierarchical viscoplastic material model." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185374.

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The prediction of motion of slowly moving landslides, also referred to as creeping slopes, is important for the reduction of landslide hazards. Such continuous and slowly moving landslides do not represent the usual stability problems of geotechnical analysis because these slopes are neither still nor ruptured but they move. For proper modeling of the motion of landslides, it is essential to develop improved techniques that integrate appropriate modeling of geological materials involved, laboratory and field tests, and verifications using computational methods. This dissertation focusses atten

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8

Gustafsson, David. "Constitutive modelling of the nickel base superalloy IN718, a preparatory study." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15755.

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<p>One of the limiting factors in gas turbine design is the allowable metal temperatures and loads in critical components. Specially designed superalloys are used when the conditions are most severe. One of these superalloys is Inconel 718. To be able to design components for higher temperature and higher loads, an accurate understanding and computational model of the material is needed. In this thesis the deformation mechanisms of Inconel 718 have been investigated and a theoretical basis for modelling in a large deformation context has been established. Finally a viscoplastic nonlinear kinem

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9

Wang, Yun Yeng. "Constitutive Modeling of the Unloading Behavior of Paper Material Using the Asymtotic Fiber and Bond Model." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20001127-081238.

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<p>AbstractWANG, YUN YENG. Constitutive Modeling of the Unloading Behavior of Paper Material Using the Asymptotic Fiber and Bond Model. (Under the direction of Dr. M. K. Ramasubramanian)Current constitutive models for paper and paperboard material are focused on the prediction of the sheet stress-strain behavior during loading. The unloading process has not been widely addressed. This work will focus on modeling the unloading behavior of paper material in one- and two-dimensional problems. For the one-dimensional problem, i.e. uniaxial tensile test, the asymptotic fiber and bond model by Sinha

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10

Hogan, Erik A. "An efficient method for the optimization of viscoplastic constitutive model constants." Honors in the Major Thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1274.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering and Computer Science<br>Aerospace Engineering

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11

AMINJIKARAI, SRINIVASA BABU. "A STRAIN RATE DEPENDENT 3D MICROMECHANICAL MODEL FOR FINITE ELEMENT SIMULATIONS OF PLAIN WEAVE COMPOSITE STRUCTURES." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1070549522.

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12

Singh, Kamakshi. "Material Characterization, Constitutive Modeling and Finite Element Simulation of Polymethyl methacrylate (PMMA) for Applications in Hot Embossing." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1300829011.

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13

May, Jessica Anne. "Development of an Experimentally Validated Non-linear Viscoelastic Viscoplastic Model for a Novel Fuel Cell Membrane Material." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/46977.

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The proton exchange membrane (PEM) is a key component in proton exchange membrane fuel cells (PEMFCs). During standard fuel cell operation, the PEM degrades due to cyclic hygrothermal loads, resulting in performance loss or total failure. Improvement of current PEM materials and development of cheaper, more durable materials is essential to the commercialization of PEMFC technology, which may provide an attractive alternative energy source for transportation. This dissertation investigates a new PEM material which is a blend of sulfonated perfluorocyclobutane (PFCB) and polyvinylidene fluorid

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14

上田, 恭平. "砂の力学モデルとしての多重せん断モデルの大変形解析の定式化およびその適用性に関する研究". 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120801.

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15

Rivollet, Benoit. "Constitutive models for ferroelectric materials." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16463.

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16

Vigliotti, Andrea. "Constitutive models for lattice materials." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114523.

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Natural materials are often characterised by a cellular microstructure which allows them to achieve a wide range of mechanical properties. This microarchitecture has provided inspiration for the development of high performance manmade structures and artificial materials. Among cellular solids, lattice materials are a subset characterised by an ordered, periodic, microstructure that can be tailored to achieve specific combinations of stiffness strength and density. This thesis presents a methodology for the derivation of constitutive models for lattice materials. The approach presented here is

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17

Mezquida, Alcaraz Eduardo José. "Numerical Modelling of UHPFRC: from the Material to the Structural Element." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/167017.

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[ES] El principal objetivo de la presente tesis es el desarrollo de una completa metodología para el modelado numérico del UHPFRC desde el material hasta el elemento estructural. Se pretende contribuir al avance del conocimiento del comportamiento mecánico del UHPFRC obteniendo como resultado un procedimiento para la modelización numérica que permita el modelado y diseño estructural que permitiría hacer que este material fuera competitivo para ser utilizado en el mercado de la construcción. En la metodología de modelado propuesta, se considera un comportamiento constitutivo del UHPFRC optimiza

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18

Serra, Àguila Albert. "Propuesta de nuevos modelos constitutivos para caracterización viscoelástica de materiales termoplásticos." Doctoral thesis, Universitat Ramon Llull, 2013. http://hdl.handle.net/10803/127157.

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El present treball té dos objectius fonamentals: 1) Obtenir models matemàtics per a definir el comportament d’alguns materials termoplàstics específics a partir de les dades de l’anàlisi dinamo-mecànic (DMA) i poder predir els mòduls de tracció i de creep sense utilitzar la màquina universal d’assajos (MUE). 2) Obtenir codis de simulació on l’usuari pugui predir aquests mateixos mòduls de tracció i de creep introduint els paràmetres d’entrada necessaris. Aquests paràmetres són la velocitat de deformació, el temps i la temperatura. Així, el concepte bàsic d’aquest projecte és el següent: a p

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19

Su, Cheng Ph D. Massachusetts Institute of Technology. "A continuum constitutive model for amorphous metallic materials." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38928.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.<br>Includes bibliographical references (leaves 153-161).<br>A finite-deformation, Coulomb-Mohr type constitutive theory for the elastic-viscoplastic response of pressure-sensitive and plastically-dilatant isotropic materials has been developed. The constitutive model has been implemented in a finite element program, and the numerical capability is used to study the deformation response of amorphous nietallic glasses. Specifically, the response of an amorphous metallic glass in tension, compression, s

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20

Amini, Khoiy Keyvan. "Biomechanical Characterization and Simulation of the Tricuspid Valve." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1542651986497595.

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21

Mihai, Iulia. "Micromechanical constitutive models for cementitious composite materials." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/24624/.

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A micromechanical constitutive model for concrete is proposed in which microcrack initiation, in the interfacial transition zone between aggregate particles and cement matrix, is governed by an exterior-point Eshelby solution. The model assumes a two-phase elastic composite, derived from an Eshelby solution and the Mori-Tanaka homogenization method, to which circular microcracks are added. A multi-component rough crack contact model is employed to simulate normal and shear behaviour of rough microcrack surfaces. It is shown, based on numerical predictions of uniaxial, biaxial and triaxial beha

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22

Man, Hou Michael Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Implicit coupled constitutive relations and an energy-based method for material modelling." Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2009. http://handle.unsw.edu.au/1959.4/43652.

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The contributions of this thesis are an implicit modelling method for the coupled constitutive relations and an energy-based method for material modelling. The two developed methods utilise implicit models to represent material constitutive relations without the requirement of physical parameters. The first method is developed to model coupled constitutive relations using state-space representation with neural networks. State-space representation is employed to express the desired relations in a compact fashion while simultaneously providing the capability of modelling rate- and/or path-depend

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23

Al, Bawaneh Mahmoud. "Determination of material constitutive models using orthogonal machining tests." Diss., Wichita State University, 2007. http://hdl.handle.net/10057/1483.

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The aim of present research is to fine-tune and improve Johnson-Cook (JC) constitutive model parameters for American Iron and Steel Institute (AISI) 1045 carbon steel and Oxygen-free high conductivity (OFHC) copper using orthogonal machining tests. This dissertation is divided into two parts. Part one is concerned with improving Johnson-Cook (JC) constitutive model parameters for AISI 1045 carbon steel by comparing results of finite element (FE) simulations of orthogonal machining with experimental results. A large number of FE simulations are carried out using different values for each of the

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24

Al, Bawaneh Mahmoud Madhavan Viswanathan. "Determination of material constitutive models using orthogonal machining tests /." Diss., A link to full text of this thesis in SOAR, 2007. http://hdl.handle.net/10057/1483.

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25

Abdelal, Gasser F. "A three-phase constitutive model for macrobrittle fatigue damage of composites." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1485.

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Thesis (Ph. D.)--West Virginia University, 2000.<br>Title from document title page. Document formatted into pages; contains xiii, 183 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 180-183).

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26

Kiefer, Bjoern. "A phenomenological constitutive model for magnetic shape memory alloys." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4712.

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A thermodynamics-based constitutive model is derived which predicts the nonlinear strain and magnetization response that magnetic shape memory alloys (MSMAs) exhibit when subjected to mechanical and magnetic loads. The model development is conducted on the basis of an extended thermo-magneto-mechanical framework. A novel free energy function for MSMAs is proposed, from which the constitutive equations are derived in a thermodynamically-consistent manner. The nonlinear and hysteretic nature of the macroscopic material behavior is captured through the evolution of internal state variables which

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27

Tshai, K. Y. "Evaluation and development of constitutive material models for thermoforming applications." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411822.

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28

Madaschi, Aldo. "A nonlinear viscoplastic double yield surface constitutive model for geologic materials." Doctoral thesis, Università degli studi di Trento, 2015. https://hdl.handle.net/11572/369021.

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A new constitutive model is proposed to describe the stress-strain-time behaviour of clays and organic soils. This approach is based on the framework of overstress viscoplastic theory and can be applied to any elastoplastic (inviscid) model.The most innovative idea of the proposed model is the identification of two components of strain for each deformation mechanism. In particular, in both the elastic and the plastic regimes a fast and a slow strain mechanism are assumed to be present. To this aim the constitutive model is based on two yield surfaces based on overstress viscoplasticity theory:

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Madaschi, Aldo. "A nonlinear viscoplastic double yield surface constitutive model for geologic materials." Doctoral thesis, University of Trento, 2015. http://eprints-phd.biblio.unitn.it/1513/1/Aldo_Madaschi_B5.pdf.

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A new constitutive model is proposed to describe the stress-strain-time behaviour of clays and organic soils. This approach is based on the framework of overstress viscoplastic theory and can be applied to any elastoplastic (inviscid) model.The most innovative idea of the proposed model is the identification of two components of strain for each deformation mechanism. In particular, in both the elastic and the plastic regimes a fast and a slow strain mechanism are assumed to be present. To this aim the constitutive model is based on two yield surfaces based on overstress viscoplasticity theory:

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30

Miyazono, Toshiya. "Constitutive models of a time dependent material at finite strain levels /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/7134.

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31

Shi, Bin 1966. "Identification of the material constitutive equation for simulation of the metal cutting process." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115709.

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This study presents a novel methodology to characterize material plastic behavior within a practical range of stresses, strains, strain rates, and temperatures encountered in the metal cutting process. The methodology is based on integrating a newly developed analytical model with quasi-static tests and orthogonal cutting experiments that incorporate a laser heating system. Friction and heat transfer models are developed to describe the tribological and thermal interactions at the tool-chip interface. These models are implemented in a FEM package in order to improve the accuracy of the simulat

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32

Zhang, Feng. "Constitutive Models for Geologic Materials and Their Application to Excavation Problems." Kyoto University, 1995. http://hdl.handle.net/2433/160758.

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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第6009号<br>工博第1406号<br>新制||工||983(附属図書館)<br>UT51-95-D328<br>京都大学大学院工学研究科交通土木工学専攻<br>(主査)教授足立紀尚, 教授柴田徹, 教授大西有三<br>学位規則第4条第1項該当

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33

Llobet, Vallejo Jordi. "A constitutive model for fatigue and residual strength predictions of composite laminates." Doctoral thesis, Universitat de Girona, 2020. http://hdl.handle.net/10803/670692.

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This thesis investigates the fatigue behaviour of fibre-reinforced composite laminates. Fatigue of composite materials is a complex subject both from an experimental and numerical modelling point of view. In this context, we designed a quite extensive experimental campaign to investigate the failure mechanisms that occur when the composite material undergoes fatigue. Then, we developed a constitutive model to anticipate the mechanical behaviour and the final strength of the material. This model was implemented inside a finite element code in order to analyse the behaviour of composite structur

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34

Sánchez, Molina David. "A constitutive model of human esophagus tissue with application for the treatment of stenosis." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/125469.

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This dissertation is a research about the mechanical behavior of the human esophagus. This work is intended to be applied in the treatment of stenosis and other esophageal diseases that frequently require a procedure of forced dilation, that involves high pressures on the esophagus wall. This study proposes a constitutive model to simulate forced dilatations. This study includes the experimental characterization of the mechanical behavior of human esophagus. In addition, some theoretical questions and experimental issues were addressed and solved. This dissertation summarizes the previous wor

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35

Vorontsov, Sergey. "Rheology of Ionomers." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1429210577.

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36

Haberman, Keith Rosakis Ares J. Rosakis Ares J. "A micromechanical constitutive model for the dynamic response of brittle materials "Dynamic response of marble" /." Diss., Pasadena, Calif. : California Institute of Technology, 2000. http://resolver.caltech.edu/CaltechETD:etd-12182007-113248.

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37

Galang, Kevin Mathew Lopez. "AN EXPERIMENTALLY GENERATED CONSTITUTIVE MODEL FOR PEAK STRESS (σ_peak) IN COMPRESSION SAMPLES". DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/940.

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The hot working behavior of AISI 1018 steel was studied by hot-compression deformation tests on the Gleeble 1500 thermo-mechanical simulator at true strain values of -0.143 and -0.405, true strain rate values of 0.01 and 0.1, and working temperatures of 900°C and 1000°C. The tests show that a lower working temperature and lower true strain value results in a greater maximum compressive force. The apparent activation energy Qapp was calculated by using the Zener-Hollomon parameter combined with the low stress law. Qapp was calculated to be 311 kJ mol-1 K-1.

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38

Chretien, Nicolas. "Numerical Constitutive Models of Woven and Braided Textile Structural Composites." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/31902.

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Equivalent, three-dimensional elastic moduli are determined from unit cell models of balanced plain weave, 2D braid, 2D triaxial braid and 4x4 twill textile composite materials consisting of interlaced or intertwined yarns. The yarn paths are modeled with undulation portions, in which one yarn passes over and under one or more yarns, and with straight portions. It is assumed that the centerline of a yarn in the undulation portions is described by the sine function, and that the cross-sectional area of a yarn and the thickness of a yarn, normal to the centerline, are uniform along the centerlin

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Sadeghzadeh, Milani Abbas. "Multi-objective inverse method for obtaining constitutive material parameters of textile composites using two hyperelastic models." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18190.

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Numerical simulation of forming processes has been an important means for material selection, tool design, and process optimization. A critical component of simulation, however, is an accurate material constitutive model, describing the response of the material under possible modes of deformation. The accuracy, in turn, is linked to the tests and techniques applied for identification of constitutive models: the more elaborate the identification, the more reliable the material parameters. For textile composites, uncontrollable factors such as contact friction, misalignment, slip, variations in

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40

Harth, Tobias [Verfasser]. "Identification of Material Parameters for Inelastic Constitutive Models : Stochastic Simulation and Design of Experiments / Tobias Harth." Aachen : Shaker, 2003. http://d-nb.info/1179036204/34.

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Webber, Kyle Grant. "Effect of Domain Wall Motion and Phase Transformations on Nonlinear Hysteretic Constitutive Behavior in Ferroelectric Materials." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22695.

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The primary focus of this research is to investigate the non-linear behavior of single crystal and polycrystalline relaxor ferroelectric PMN-xPT and PZN-xPT through experimentation and modeling. Characterization of single crystal and polycrystalline specimens with similar compositions was performed. These data give experimental insight into the differences that may arise in a polycrystal due to local interaction with inhomogeneities. Single crystal specimens were characterized with a novel experimental technique that reduced clamping effects at the boundary and gave repeatable results. The me

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42

Bresolin, Francisco Luiz. "Um estudo de diferentes modelos constitutivos para caracterização mecânica de materiais termoplásticos submetidos à deformações finitas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/143907.

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A simulação numérica de componentes estmturais necessita de dados do material que são obtidos por ensaios mecânicos. Materiais não-lineares, como termoplásticos, podem apresentar em ensaios de tração estricção quando submetidos à deformações firútas. Este fenômeno normalmente ainda está associado a campos de deformações heterogêneos que possuem uma cinemática particular, se propagando ao longo do corpo. A formação e propagação da estricção podem mascarar o real comportamento mecârúco do material quando obtido por um ensaio de tração, levando o processo de caracterização da curva tensão-deforma

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García, Fernández Víctor Gerardo. "Constitutive relations to model the hot flow of commercial purity copper." Doctoral thesis, Universitat Politècnica de Catalunya, 2004. http://hdl.handle.net/10803/6043.

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Se ha llevado a cabo un estudio con el fin de observar diferencias en el comportamiento de fluencia en caliente de los cobres refinados al fuego con una pureza de 99.9%, dicho estudio ha permitido proponer modelos para predecir la curva esfuerzo-deformación y para predecir el tamaño de grano recristalizado dinámicamente. Los cobres refinados al fuego con una pureza de 99.9% se caracterizan por tener una composición residual de varios otros elementos, en algunos casos hasta 1000ppm. En los cobres con por lo menos 99.9% de pureza que tengan pocos elementos residuales, las diferencias observada

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Luscher, Darby J. "A hierarchical framework for the multiscale modeling of microstructure evolution in heterogeneous materials." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33968.

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All materials are heterogeneous at various scales of observation. The influence of material heterogeneity on nonuniform response and microstructure evolution can have profound impact on continuum thermomechanical response at macroscopic "engineering" scales. In many cases, it is necessary to treat this behavior as a multiscale process. This research developed a hierarchical multiscale approach for modeling microstructure evolution. A theoretical framework for the hierarchical homogenization of inelastic response of heterogeneous materials was developed with a special focus on scale invari

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Costa, Romeu Rony Cavalcante da. "Aplicabilidade de modelos constitutivos para analisar o comportamento mecânico de um biopolímero." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-18122015-112815/.

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Este trabalho aborda o estudo de modelos constitutivos a fim de analisar o comportamento mecânico de um biopolímero derivado de óleo de mamona (Ricinus communis). A importância deste trabalho se dá ao fato de: servir como roteiro de ensaio de materiais poliméricos; completar caracterização do material estudado além do regime viscoelástico, bem como aplicação da análise do comportamento do material além do regime viscoelástico linear. A aplicação dos modelos avaliados via Método dos Elementos Finitos (MEF) exigiu o levantamento das propriedades e do comportamento mecânico do biopolímero, bem co

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Rodrigues, Eduardo Alexandre [UNESP]. "Um modelo constitutivo de dano composto para simular o comportamento de materiais quase-frágeis." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/97142.

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Made available in DSpace on 2014-06-11T19:28:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-03-21Bitstream added on 2014-06-13T20:37:41Z : No. of bitstreams: 1 rodrigues_ea_me_bauru.pdf: 1602991 bytes, checksum: 7f755b87b5be84900b2d054f02413197 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>No presente trabalho desenvolve-se um modelo constitutivo baseado na mecânica do dano contínuo para representar o comportamento de materiais que apresentam diferentes respostas quando solicitados à tração ou à compreensão. obtem-se uma representação constitutiva

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Rodrigues, Eduardo Alexandre. "Um modelo constitutivo de dano composto para simular o comportamento de materiais quase-frágeis /." Bauru : [s.n.], 2011. http://hdl.handle.net/11449/97142.

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Resumo: No presente trabalho desenvolve-se um modelo constitutivo baseado na mecânica do dano contínuo para representar o comportamento de materiais que apresentam diferentes respostas quando solicitados à tração ou à compreensão. obtem-se uma representação constitutiva através da composição de modelos simples e específicos para tratar cada tipo de solicitação. Este modelo combinado é capaz inclusive de lidar com carregamentos alternados (tração e compreensão), envolvendo fechamento e reabertura de fissuras existentes. Para modelar o comportamento em compreensão emprega-se o modelo constitutiv

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Reips, Louise. "Modelo constitutivo para materiais viscoelásticos reforçados por fibras adequado à simulação de tecidos conectivos." Florianópolis, SC, 2008. http://repositorio.ufsc.br/xmlui/handle/123456789/91974.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Mecânica<br>Made available in DSpace on 2012-10-24T04:27:40Z (GMT). No. of bitstreams: 1 261594.pdf: 2070671 bytes, checksum: 6d11b4ec46c6dab0b46b91f6653b430b (MD5)<br>O estudo do comportamento mec#anico de diferentes sistemas e componentes biol´ogicos submetidos a esfor¸cos termomec#anicos ´e uma ´area de conhecimento abordada pela biomec #anica. Diversos modelos mec#anicos matem´aticos apropriados para sistemas biol´ogicos podem ser resolvidos utilizando ferramentas nu

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Ruiters, Alton. "Analytical behaviour of FRP strengthened reinforced concrete beams under low velocity impact load incorporating rate dependant material constitutive models." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/9078.

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Includes bibliographical references.<br>Since the 1980s, the use of fibre reinforced polymer (FRP) composites in strengthening and rehabilitation of existing reinforced and pre-stressed structures has gained popularity. Versatility, high strength to weight ratio, corrosion resistance, excellent creep and fatigue behaviour, and ease of installation are amongst some of the advantages offered by externally bonded FRP systems over traditional strengthening methods. In addition to strengthening for static loading, there are many scenarios where strengthening is required to elements subjected to dyn

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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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