Download or read book Physically motivated Modeling of Deformation induced Anisotropy written by Mark F. Horstemeyer and published by . This book was released on 1995 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Modeling of Deformation Induced Anisotropy written by Marwan H. Zaini and published by . This book was released on 2002 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constitutive Models for Rubber X written by Alexander Lion and published by CRC Press. This book was released on 2017-08-15 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to develop innovative products, to reduce development costs and the number of prototypes and to accelerate development processes, numerical simulations become more and more attractive. As such, numerical simulations are instrumental in understanding complicated material properties like chemical ageing, crack propagation or the strain- and temperature-induced crystallisation of rubber. Therefore, experimentally validated and physically meaningful constitutive models are indispensable. Elastomers are used for products like tyres, engine and suspension mounts or seals, to name a few. The interest in modelling the quasi-static stress-strain behaviour was dominant in the past decades, but nowadays the interests also include influences of environmental conditions. The latest developments on the material behaviour of elastomers are collected in the present volume. Constitutive Models for Rubber X is a comprehensive compilation of nearly all oral and poster contributions to the European Conference on Constitutive Models for Rubber (Munich, 28-31 August 2017). The 95 highly topical contributions reflect the state of-the-art in material modelling and testing of elastomers. They cover the fields of material testing and processing, filler reinforcement, electromagnetic sensitive elastomers, dynamic properties, constitutive modelling, micromechanics, finite element implementation, stress softening, chemical ageing, fatigue and durability. In the area of rubbery materials and structures, applied research will play an important role also in the coming decades. Constitutive Models for Rubber X is of interest to developers and researchers involved in the rubber processing and CAE software industries, as well as for academics in nearly all disciplines of engineering and material sciences.
Download or read book Constitutive Models for Rubber XI written by Bertrand Huneau and published by CRC Press. This book was released on 2019-06-14 with total page 1387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constitutive Models for Rubber XI is a comprehensive compilation of both the oral and poster contributions to the European Conference on Constitutive Models for Rubber. This 11th edition, held in Nantes (France) 25-27th June 2019, is the occasion to celebrate the 20th anniversary of the ECCMR series. Around 100 contributions reflect the state-of-the-art in the mechanics of elastomers. They cover the fields of: Material testing Constitutive modelling and finite element implementation Micromechanical aspects, and Durability (failure, fatigue and ageing) Constitutive Models for Rubber XI is of interest for developers and researchers involved in the rubber processing and CAE software industries, as well as for academics in nearly all disciplines of elastomer mechanics and technology.
Download or read book Practical Aspects of Computational Chemistry written by Jerzy Leszczynski and published by Springer Science & Business Media. This book was released on 2009-10-03 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Practical Aspects of Computational Chemistry" presents contributions on a range of aspects of Computational Chemistry applied to a variety of research fields. The chapters focus on recent theoretical developments which have been used to investigate structures and properties of large systems with minimal computational resources. Studies include those in the gas phase, various solvents, various aspects of computational multiscale modeling, Monte Carlo simulations, chirality, the multiple minima problem for protein folding, the nature of binding in different species and dihydrogen bonds, carbon nanotubes and hydrogen storage, adsorption and decomposition of organophosphorus compounds, X-ray crystallography, proton transfer, structure-activity relationships, a description of the REACH programs of the European Union for chemical regulatory purposes, reactions of nucleic acid bases with endogenous and exogenous reactive oxygen species and different aspects of nucleic acid bases, base pairs and base tetrads.
Download or read book Mathematical Modeling of Inelastic Deformation written by J.F. Besseling and published by CRC Press. This book was released on 1994-05-15 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical Modeling of Inelastic Deformation details the mathematical modeling of the inelastic behavior of engineering materials. The authors use a thermodynamic approach to the subject and focus on crystalline materials, but not to the exclusion of macro-moleular solids. Within a unified theory for small and large deformations, they develop simple models, such as the elastic-perfectly plastic model, as well as complex models dealing with anisotropic hardening. The book includes finite element implementation of the theory and illustrates the implementation with examples from heat production and conduction processes.
Download or read book Physically Motivated Internal State Variable Form of a Higher Order Damage Model for Engineering Materials with Uncertainty written by Kiran Nainmal Solanki and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Many experiments demonstrate that isotropic ductile materials used in engineering applications develop anisotropic damage and shows significant variation in elongation to failure. This anisotropic damage is manifest by material microstructural heterogeneities and morphological changes during deformation. The variation in elongation to the failure could be attributed to the uncertainties in the material microstructure and loading conditions. To study this deformation induced anisotropy arising from the initial material heterogeneities, we first performed uncertainty analysis using current form on an internal state variable plasticity and isotropic damage model (Bammann, 1984; Horstemeyer, 2001) to quantify the effect due to variations in material microstructure and loading conditions on elongation to failure. We extend the current isotropic damage form of theory into an anisotropic damage form for ductile material in which material heterogeneities are introduced based on damage distribution functions converted into a damage tensor of second rank. The outcome of this research is a physically motivated, uncertainty-based, anisotropic damage constitutive model that links microstructural features to mechanical properties. This was accomplished by pursuing three sub goals: (1) develop and quantify uncertainty related to material heterogeneities, (2) develop a methodology related to a higher order tensorial rank of damage for void nucleation and void growth, and (3) integrate thermodynamically constrained damage with a rate dependent plasticity constitutive material model. Later, we also proposed a new ISV theory that physically and strongly couples deformation due to damage-related internal defects to metal plasticity.
Download or read book Large Deformations of Solids Physical Basis and Mathematical Modelling written by J. Gittus and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constitutive Models for Rubber VI written by Gert Heinrich and published by CRC Press. This book was released on 2009-09-01 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments in order to represent the material behaviour of filler-reinforced elastomers under realistic operating conditions are collected in this volume. Special topics are finite element simulations and methods, dynamic material properties, experimental characterization, lifetime prediction, friction, multiphysics and biomechanics, reinf
Download or read book PHYSICALLY MOTIVATED INTERNAL STATE VARIABLE FORM OF A HIGHER ORDER DAMAGE MODEL FOR ENGINEERING MATERIALS WITH UNCERTAINTY written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Many experiments demonstrate that isotropic ductile materials used in engineering applications develop anisotropic damage and shows significant variation in elongation to failure. This anisotropic damage is manifest by material microstructural heterogeneities and morphological changes during deformation. The variation in elongation to the failure could be attributed to the uncertainties in the material microstructure and loading conditions. To study this deformation induced anisotropy arising from the initial material heterogeneities, we first performed uncertainty analysis using current form on an internal state variable plasticity and isotropic damage model (Bammann, 1984; Horstemeyer, 2001) to quantify the effect due to variations in material microstructure and loading conditions on elongation to failure. We extend the current isotropic damage form of theory into an anisotropic damage form for ductile material in which material heterogeneities are introduced based on damage distribution functions converted into a damage tensor of second rank. The outcome of this research is a physically motivated, uncertainty-based, anisotropic damage constitutive model that links microstructural features to mechanical properties. This was accomplished by pursuing three sub goals: (1) develop and quantify uncertainty related to material heterogeneities, (2) develop a methodology related to a higher order tensorial rank of damage for void nucleation and void growth, and (3) integrate thermodynamically constrained damage with a rate dependent plasticity constitutive material model. Later, we also proposed a new ISV theory that physically and strongly couples deformation due to damage-related internal defects to metal plasticity.
Download or read book Modelling of Metal Forming Processes written by J.L. Chenot and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physical modelling of metal forming processes has been widely used both in University and in Industry for many years. Relatively simple numerical models, such as the Slab Method and the Upper Bound Method, were first used and many such models are implemented in the industry for practical design or regulation of forming processes. These are also under investigation in the University, mainly for treat models ments which require low cost calculations or very fast answers for on-line integration. More recently, sophisticated numerical methods have been used for the simulation of metal flow during forming operations. Since the early works in 1973 and 1974, mainly in U. K. and U. S. A. , the applications of the finite element method to metal processing have been developed in many laboratories all over the world. Now the numerical approach seems to be widely re cognized as a powerful tool for comprehension oriented studies, for predic ting the main technological parameters, and for the design and the optlmi zation of new forming sequences. There is also a very recent trend for the introduction of physical laws in the thermo-mechanical models, in order to predict the local evolution of internal variable representing the micro structure of the metal. To day more and more practicians of the Industry are asking for compu ter models for design of their forming processes.
Download or read book Integrated Computational Materials Engineering ICME for Metals written by Mark F. Horstemeyer and published by John Wiley & Sons. This book was released on 2012-06-07 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: State-of-the-technology tools for designing, optimizing, and manufacturing new materials Integrated computational materials engineering (ICME) uses computational materials science tools within a holistic system in order to accelerate materials development, improve design optimization, and unify design and manufacturing. Increasingly, ICME is the preferred paradigm for design, development, and manufacturing of structural products. Written by one of the world's leading ICME experts, this text delivers a comprehensive, practical introduction to the field, guiding readers through multiscale materials processing modeling and simulation with easy-to-follow explanations and examples. Following an introductory chapter exploring the core concepts and the various disciplines that have contributed to the development of ICME, the text covers the following important topics with their associated length scale bridging methodologies: Macroscale continuum internal state variable plasticity and damage theory and multistage fatigue Mesoscale analysis: continuum theory methods with discrete features and methods Discrete dislocation dynamics simulations Atomistic modeling methods Electronics structures calculations Next, the author provides three chapters dedicated to detailed case studies, including "From Atoms to Autos: A Redesign of a Cadillac Control Arm," that show how the principles and methods of ICME work in practice. The final chapter examines the future of ICME, forecasting the development of new materials and engineering structures with the help of a cyberinfrastructure that has been recently established. Integrated Computational Materials Engineering (ICME) for Metals is recommended for both students and professionals in engineering and materials science, providing them with new state-of-the-technology tools for selecting, designing, optimizing, and manufacturing new materials. Instructors who adopt this text for coursework can take advantage of PowerPoint lecture notes, a questions and solutions manual, and tutorials to guide students through the models and codes discussed in the text.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anisotropic Ductile Fracture of Metal Sheets written by Meng Luo (Ph. D.) and published by . This book was released on 2012 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anisotropic mechanical properties are common in plastically deformed or thermomechanically processed metallic materials, e.g. in rolled or extruded sheet. Among them, the anisotropy of large strain plastic deformation and ductile fracture under multi-axial loading is highly relevant to various industrial applications such as metal forming, impact failure of structures, etc. In this thesis, a comprehensive study of the plasticity and ductile fracture of anisotropic metal sheets is presented, covering experimental characterization, constitutive modeling and numerical implementation. On the basis of an extensive multiaxial experimental program, the anisotropic plasticity of the present aluminum alloy is modeled using a macroscopic phenomenological model and a polycrystalline plasticity model, respectively. The proposed phenomenological modeling makes use of a linear-transformation- based orthotropic yield function with pressure dependence, as well as a combined isotropic/kinematic hardening law, and is able to capture most features of the anisotropic plastic behavior under various multi-axial stress states with good accuracy and computational efficiency. At the same time, a physically-motivated self-consistent polycrystalline plasticity model is utilized to describe the texture-induced anisotropy and through-thickness heterogeneity of the present sheet material. A Reduced Texture Methodology (RTM) is developed to provide the computational efficiency needed for industrial applications. In additional to an accurate prediction of all macroscopic material behaviors, the polycrystalline model reveals that the development of the crystallographic texture is the underlying mechanism of plastic anisotropy and heterogeneity. The anisotropic ductile fracture of the present aluminum alloy extrusion is investigated using a hybrid experimental-numerical approach. The experimental results show a strong dependency of the strain to fracture on the material orientation with respect to the loading direction. A new non-associated anisotropic fracture model is proposed which makes use of a stress state dependent fracture locus and an anisotropic plastic strain measure obtained through the linear transformation of the plastic strain tensor. It is shown that the use of the Modified Mohr-Coulomb (MMC) stress state weighting function in this anisotropic fracture modeling framework provides accurate predictions of the onset of fracture for all fourteen distinct fracture experiments. The proposed plasticity and fracture modeling framework is successfully validated on a industrial stretch-bending operation.
Download or read book Constitutive Models for Rubber written by Al Dorfmann and published by CRC Press. This book was released on 1999-01-01 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text aims to enable the experience accumulated by engineers and the research community in materials science, continuum mechanics and applied mathematics to be shared. In this way, the design and analysis of rubber components using the Finite Element Method should be enhanced.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1995 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constitutive Models for Rubber IV written by Per-Erik Austrell and published by Routledge. This book was released on 2017-12-04 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique properties of elastomeric materials offer numerous advantages in many engineering applications. Elastomeric units are used as couplings or mountings between rigid components, for example in shock absorbers, vibration insulators, flexible joints, seals and suspensions, etc. However, the complicated nature of the behaviour of such material makes it difficult to accurately predict the performance of these units using finite element modelling, for example. It is imperative that constitutive models accurately capture relevant aspects of mechanical behaviour. The latest developments concerning constitutive modelling of rubber is collected in these Proceedings. Topics included in this volume are, Hyperelastic models, Strength, fracture & fatigue, Dynamic properties & the Fletcher-Gent effect, Micro-mechanical & statistical approaches, Stress softening, iscoelasticity, Filler reinforcement, and Tyres, fibre & cord reinforced rubber.
