Dislocation Mechanism Based Crystal Plasticity

Dislocation Mechanism Based Crystal Plasticity Book PDF
✏Book Title : Dislocation Mechanism Based Crystal Plasticity
✏Author : Zhuo Zhuang
✏Publisher : Academic Press
✏Release Date : 2019-04-12
✏Pages : 450
✏ISBN : 9780128145920
✏Available Language : English, Spanish, And French

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✏Dislocation Mechanism Based Crystal Plasticity Book Summary : Dislocation Based Crystal Plasticity: Theory and Computation at Micron and Submicron Scale provides a comprehensive introduction to the continuum and discreteness dislocation mechanism-based theories and computational methods of crystal plasticity at the micron and submicron scale. Sections cover the fundamental concept of conventional crystal plasticity theory at the macro-scale without size effect, strain gradient crystal plasticity theory based on Taylar law dislocation, mechanism at the mesoscale, phase-field theory of crystal plasticity, computation at the submicron scale, including single crystal plasticity theory, and the discrete-continuous model of crystal plasticity with three-dimensional discrete dislocation dynamics coupling finite element method (DDD-FEM). Three kinds of plastic deformation mechanisms for submicron pillars are systematically presented. Further sections discuss dislocation nucleation and starvation at high strain rate and temperature effect for dislocation annihilation mechanism. Covers dislocation mechanism-based crystal plasticity theory and computation at the micron and submicron scale Presents crystal plasticity theory without size effect Deals with the 3D discrete-continuous (3D DCM) theoretic and computational model of crystal plasticity with 3D discrete dislocation dynamics (3D DDD) coupling finite element method (FEM) Includes discrete dislocation mechanism-based theory and computation at the submicron scale with single arm source, coating micropillar, lower cyclic loading pillars, and dislocation starvation at the submicron scale

Thermally Activated Mechanisms In Crystal Plasticity Book PDF
✏Book Title : Thermally Activated Mechanisms in Crystal Plasticity
✏Author : D. Caillard
✏Publisher : Elsevier
✏Release Date : 2003-09-08
✏Pages : 452
✏ISBN : 0080542786
✏Available Language : English, Spanish, And French

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✏Thermally Activated Mechanisms in Crystal Plasticity Book Summary : KEY FEATURES: A unified, fundamental and quantitative resource. The result of 5 years of investigation from researchers around the world New data from a range of new techniques, including synchrotron radiation X-ray topography provide safer and surer methods of identifying deformation mechanisms Informing the future direction of research in intermediate and high temperature processes by providing original treatment of dislocation climb DESCRIPTION: Thermally Activated Mechanisms in Crystal Plasticity is a unified, quantitative and fundamental resource for material scientists investigating the strength of metallic materials of various structures at extreme temperatures. Crystal plasticity is usually controlled by a limited number of elementary dislocation mechanisms, even in complex structures. Those which determine dislocation mobility and how it changes under the influence of stress and temperature are of key importance for understanding and predicting the strength of materials. The authors describe in a consistent way a variety of thermally activated microscopic mechanisms of dislocation mobility in a range of crystals. The principles of the mechanisms and equations of dislocation motion are revisited and new ones are proposed. These describe mostly friction forces on dislocations such as the lattice resistance to glide or those due to sessile cores, as well as dislocation cross-slip and climb. They are critically assessed by comparison with the best available experimental results of microstructural characterization, in situ straining experiments under an electron or a synchrotron beam, as well as accurate transient mechanical tests such as stress relaxation experiments. Some recent attempts at atomistic modeling of dislocation cores under stress and temperature are also considered since they offer a complementary description of core transformations and associated energy barriers. In addition to offering guidance and assistance for further experimentation, the book indicates new ways to extend the body of data in particular areas such as lattice resistance to glide.

The Investigation Of Plastic Behavior By Discrete Dislocation Dynamics For Single Crystal Pillar At Submicron Scale Book PDF
✏Book Title : The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale
✏Author : Yinan Cui
✏Publisher : Springer
✏Release Date : 2016-10-26
✏Pages : 131
✏ISBN : 9789811030321
✏Available Language : English, Spanish, And French

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✏The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale Book Summary : This thesis transports you to a wonderful and fascinating small-scale world and tells you the origin of several new phenomena. The investigative tool is the improved discrete dislocation-based multi-scale approaches, bridging the continuum modeling and atomistic simulation. Mechanism-based theoretical models are put forward to conveniently predict the mechanical responses and defect evolution. The findings presented in this thesis yield valuable new guidelines for microdevice design, reliability analysis and defect tuning.

Single Crystal Plasticity By Modeling Dislocation Density Rate Behavior Book PDF
✏Book Title : Single Crystal Plasticity by Modeling Dislocation Density Rate Behavior
✏Author :
✏Publisher :
✏Release Date : 2010
✏Pages :
✏ISBN : OCLC:1066029370
✏Available Language : English, Spanish, And French

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✏Single Crystal Plasticity by Modeling Dislocation Density Rate Behavior Book Summary : The goal of this work is to formulate a constitutive model for the deformation of metals over a wide range of strain rates. Damage and failure of materials frequently occurs at a variety of deformation rates within the same sample. The present state of the art in single crystal constitutive models relies on thermally-activated models which are believed to become less reliable for problems exceeding strain rates of 104 s−1. This talk presents work in which we extend the applicability of the single crystal model to the strain rate region where dislocation drag is believed to dominate. The elastic model includes effects from volumetric change and pressure sensitive moduli. The plastic model transitions from the low-rate thermally-activated regime to the high-rate drag dominated regime. The direct use of dislocation density as a state parameter gives a measurable physical mechanism to strain hardening. Dislocation densities are separated according to type and given a systematic set of interactions rates adaptable by type. The form of the constitutive model is motivated by previously published dislocation dynamics work which articulated important behaviors unique to high-rate response in fcc systems. The proposed material model incorporates thermal coupling. The hardening model tracks the varying dislocation population with respect to each slip plane and computes the slip resistance based on those values. Comparisons can be made between the responses of single crystals and polycrystals at a variety of strain rates. The material model is fit to copper.

Strengthening Mechanisms In Crystal Plasticity Book PDF
✏Book Title : Strengthening Mechanisms in Crystal Plasticity
✏Author : Ali Argon
✏Publisher : Oxford University Press on Demand
✏Release Date : 2008
✏Pages : 404
✏ISBN : 9780198516002
✏Available Language : English, Spanish, And French

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✏Strengthening Mechanisms in Crystal Plasticity Book Summary : Technologically important metals and alloys have been strengthened throughout history by a variety of empirical means. The scientific bases of the central mechanisms of such forms of strengthening, developed over the past several decades are presented here in a comprehensive form through mechanistic models and associated experimental results.

Finite Element Simulation Of Dislocation Based Plasticity And Diffusion In Multiphase Materials At High Temperature Book PDF
✏Book Title : Finite element simulation of dislocation based plasticity and diffusion in multiphase materials at high temperature
✏Author : Albiez, Jürgen
✏Publisher : KIT Scientific Publishing
✏Release Date : 2019-05-22
✏Pages : 222
✏ISBN : 9783731509189
✏Available Language : English, Spanish, And French

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✏Finite element simulation of dislocation based plasticity and diffusion in multiphase materials at high temperature Book Summary :

Gradient Plasticity Model And Its Implementation Into Marmot  Book PDF
✏Book Title : Gradient Plasticity Model and Its Implementation Into MARMOT
✏Author :
✏Publisher :
✏Release Date : 2013
✏Pages :
✏ISBN : OCLC:1065991312
✏Available Language : English, Spanish, And French

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✏Gradient Plasticity Model and Its Implementation Into MARMOT Book Summary : The influence of strain gradient on deformation behavior of nuclear structural materials, such as boby centered cubic (bcc) iron alloys has been investigated. We have developed and implemented a dislocation based strain gradient crystal plasticity material model. A mesoscale crystal plasticity model for inelastic deformation of metallic material, bcc steel, has been developed and implemented numerically. Continuum Dislocation Dynamics (CDD) with a novel constitutive law based on dislocation density evolution mechanisms was developed to investigate the deformation behaviors of single crystals, as well as polycrystalline materials by coupling CDD and crystal plasticity (CP). The dislocation density evolution law in this model is mechanism-based, with parameters measured from experiments or simulated with lower-length scale models, not an empirical law with parameters back-fitted from the flow curves.

Crystal Dislocations Their Impact On Physical Properties Of Crystals Book PDF
✏Book Title : Crystal Dislocations Their Impact on Physical Properties of Crystals
✏Author : Peter Lagerlof
✏Publisher : MDPI
✏Release Date : 2019-01-09
✏Pages : 316
✏ISBN : 9783038974659
✏Available Language : English, Spanish, And French

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✏Crystal Dislocations Their Impact on Physical Properties of Crystals Book Summary : This book is a printed edition of the Special Issue "Crystal Dislocations: Their Impact on Physical Properties of Crystals" that was published in Crystals

📒Magnesium Technology 2017 ✍ Kiran N. Solanki

Magnesium Technology 2017 Book PDF
✏Book Title : Magnesium Technology 2017
✏Author : Kiran N. Solanki
✏Publisher : Springer
✏Release Date : 2017-02-14
✏Pages : 689
✏ISBN : 9783319523927
✏Available Language : English, Spanish, And French

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✏Magnesium Technology 2017 Book Summary : The Magnesium Technology Symposium, the event on which this collection is based, is one of the largest yearly gatherings of magnesium specialists in the world. Papers represent all aspects of the field, ranging from primary production to applications to recycling. Moreover, papers explore everything from basic research findings to industrialization. Magnesium Technology 2017 covers a broad spectrum of current topics, including alloys and their properties; cast products and processing; wrought products and processing; forming, joining, and machining; corrosion and surface finishing; ecology; and structural applications. In addition, there is coverage of new and emerging applications.

📒Mesoscale Models ✍ Sinisa Mesarovic

Mesoscale Models Book PDF
✏Book Title : Mesoscale Models
✏Author : Sinisa Mesarovic
✏Publisher : Springer
✏Release Date : 2018-11-19
✏Pages : 344
✏ISBN : 9783319941868
✏Available Language : English, Spanish, And French

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✏Mesoscale Models Book Summary : The book helps to answer the following questions: How far have the understanding and mesoscale modeling advanced in recent decades, what are the key open questions that require further research and what are the mathematical and physical requirements for a mesoscale model intended to provide either insight or a predictive engineering tool? It is addressed to young researchers including doctoral students, postdocs and early career faculty,

Understanding The Deformation Mechanisms In Ni Based Superalloys With Using Crystal Plasticity Finite Element Method Book PDF
✏Book Title : Understanding the Deformation Mechanisms in Ni based Superalloys with Using Crystal Plasticity Finite Element Method
✏Author : Tianju Chen
✏Publisher :
✏Release Date : 2020
✏Pages : 89
✏ISBN : OCLC:1198498985
✏Available Language : English, Spanish, And French

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✏Understanding the Deformation Mechanisms in Ni based Superalloys with Using Crystal Plasticity Finite Element Method Book Summary : "Ni-based superalloy is considered as a good candidate due to its excellent resistance to elevated temperature deformation for long term period application. Understanding the deformation and failure mechanisms of Ni-Based superalloys is very helpful for providing design guidelines for processing Ni-based superalloys. Experimental characterization indicates that the deformation mechanisms of Ni based superalloy is strongly microstructure dependent. Besides, damage transform from the void nucleation to the macro cracks by voids growth leading to the failure of the Ni-based superalloys are also showing strong microstructure sensitivity. Therefore, this work focuses on the prediction and comprehension of the deformation and void growth behavior in Ni based superalloy at different working conditions via crystal plasticity finite element modeling and simulation. Physically based crystal plasticity frameworks were developed for newly Ni-based superalloy Haynes 282. It was found that dislocation shearing through the precipitates were acting as the main contributor to the strength of Haynes 282 at room temperature and 815°C. Our analysis of the creeping behavior of Haynes 282 exhibited that resistance of general climb replaced by the resistance induced by the deposited climb dislocation density. In addition, in the study of void growth behavior, our simulation results demonstrated that as the main loading axis perpendicular to the grain boundary (GB), voids grow more slowly on tilt GBs in bicrystals than those in single and bicrystals with twist GBs. And tilt GBs would promote the void grow into irregular shape"--Abstract, page iv.

Engineering Plasticity And Its Applications Book PDF
✏Book Title : Engineering Plasticity and Its Applications
✏Author : Nobutada Ohno
✏Publisher : Trans Tech Publications Ltd
✏Release Date : 2007-06-15
✏Pages : 1570
✏ISBN : 9783038131267
✏Available Language : English, Spanish, And French

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✏Engineering Plasticity and Its Applications Book Summary : Volume is indexed by Thomson Reuters CPCI-S (WoS). This edited collection of 240 peer-reviewed articles covers a broad range of topics dealing with plasticity in various materials, such as metals, composites, polymers, foams, soils, and rocks at the nano-, micro- and macro-scales. These informative papers will bring the reader fully up-to-date with the latest research efforts advancing on a broad range of fronts in engineering plasticity

Integrated Computational Materials Engineering Icme For Metals Book PDF
✏Book Title : Integrated Computational Materials Engineering ICME for Metals
✏Author : Mark F. Horstemeyer
✏Publisher : John Wiley & Sons
✏Release Date : 2012-06-07
✏Pages : 456
✏ISBN : 9781118342657
✏Available Language : English, Spanish, And French

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✏Integrated Computational Materials Engineering ICME for Metals Book Summary : 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.

Inelastic Behavior Of Materials And Structures Under Monotonic And Cyclic Loading Book PDF
✏Book Title : Inelastic Behavior of Materials and Structures Under Monotonic and Cyclic Loading
✏Author : Holm Altenbach
✏Publisher : Springer
✏Release Date : 2015-02-03
✏Pages : 253
✏ISBN : 9783319146607
✏Available Language : English, Spanish, And French

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✏Inelastic Behavior of Materials and Structures Under Monotonic and Cyclic Loading Book Summary : This book presents studies on the inelastic behavior of materials and structures under monotonic and cyclic loads. It focuses on the description of new effects like purely thermal cycles or cases of non-trivial damages. The various models are based on different approaches and methods and scaling aspects are taken into account. In addition to purely phenomenological models, the book also presents mechanisms-based approaches. It includes contributions written by leading authors from a host of different countries.

📒Heterogeneous Materials ✍ Muhammad Sahimi

Heterogeneous Materials Book PDF
✏Book Title : Heterogeneous Materials
✏Author : Muhammad Sahimi
✏Publisher : Springer Science & Business Media
✏Release Date : 2003-05-15
✏Pages : 638
✏ISBN : 9780387001661
✏Available Language : English, Spanish, And French

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✏Heterogeneous Materials Book Summary : This book describes and discusses the properties of heterogeneous materials. The properties considered include the conductivity (thermal, electrical, magnetic), elastic moduli, dielectrical constant, optical properties, mechanical fracture, and electrical and dielectrical breakdown properties. Both linear and nonlinear properties are considered. The nonlinear properties include those with constitutive nonlinearities as well as threshold nonlinearities, such as brittle fracture and dielectric breakdown. A main goal of this book is to compare two fundamental approaches to describing and predicting materials properties, namely, the continuum mechanics approach and those based on the discrete models. The latter models include the lattice models and the atomistic approaches. The book provides comprehensive and up-to-date theoretical and computer simulation analysis of materials properties. Typical experimental methods for measuring all of these properties are outlined, and comparison is made between the experimental data and the theoretical predictions. Volume I covers linear properties, while volume II considers nonlinear and fracture and breakdown properties, as well as atomistic modeling. This multidisciplinary book will appeal to applied physicists, materials scientists, chemical and mechanical engineers, chemists, and applied mathematicians. Muhammad Sahimi is Professor and Chairman of Chemical Engineering at the University of Southern California in Los Angeles, and Adjunct Professor of Physics at the Institute for Advanced Studies in Basic Sciences in Zanjan, Iran. His current research interests include transport and mechanical properties of heterogeneous materials: flow, diffusion and reaction in porous media, and large-scale scientific complications. Among his honors are the Alexander von Humbodt Foundation Research Award, and the Kapitza Gold Medal.

📒Plasticity Theory ✍ Jacob Lubliner

Plasticity Theory Book PDF
✏Book Title : Plasticity Theory
✏Author : Jacob Lubliner
✏Publisher : Courier Corporation
✏Release Date : 2013-04-22
✏Pages : 544
✏ISBN : 9780486318202
✏Available Language : English, Spanish, And French

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✏Plasticity Theory Book Summary : The aim of Plasticity Theory is to provide a comprehensive introduction to the contemporary state of knowledge in basic plasticity theory and to its applications. It treats several areas not commonly found between the covers of a single book: the physics of plasticity, constitutive theory, dynamic plasticity, large-deformation plasticity, and numerical methods, in addition to a representative survey of problems treated by classical methods, such as elastic-plastic problems, plane plastic flow, and limit analysis; the problem discussed come from areas of interest to mechanical, structural, and geotechnical engineers, metallurgists and others. The necessary mathematics and basic mechanics and thermodynamics are covered in an introductory chapter, making the book a self-contained text suitable for advanced undergraduates and graduate students, as well as a reference for practitioners of solid mechanics.

Reversible Crystal Plasticity Book PDF
✏Book Title : Reversible Crystal Plasticity
✏Author : Vladimir Boyko
✏Publisher : Springer Science & Business Media
✏Release Date : 1997-05-09
✏Pages : 294
✏ISBN : 0883188694
✏Available Language : English, Spanish, And French

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✏Reversible Crystal Plasticity Book Summary : Market: Research scientists and students in materials science, physical metallurgy, and solid state physics. This detailed monograph presents the theory of reversible plasticity as a new direction of development in crystal physics. It features a unique integration of traditional concepts and new studies of high- temperature superconductors, plus in-depth analyses of various related phenomena. Among the topics discussed are elastic twinning (discovered by Dr. Garber), thermoelastic martensite transformation, superelasticity, shape memory effects, the domain structure of ferroelastics, and elastic aftereffect. Partial Contents: 1. Transformation of Dislocations. Dislocation Description of a Phase Transformation Front. 2. Dislocation Theory of Elastic Twinning. Twinning of Crystals: Principal Definitions. 3. Statics and Dynamics of Elastic Twinning. Discovery of Elastic Twinning. Verification of the Validity of the Static Theory in a Description of the Macroscopic Behavior of an Elastic Twin. 4. Thermoelastic Martensitic Transformation. Martensitic Transformation: a Diffusionless Process of Rebuilding the Crystal Lattice. 5. Superelasticity and the Shape Memory Effect. Main Characteristics of Superelasticity and Shape Memory Effects. 6. Reversible Plasticity of Ferroelastics. Ferroelastics: Main Definitions. 7. Investigation of Reversible Plasticity of Crystals by the Acoustic Emission Method. Emission of Sound by Moving Dislocations andTheir Pileups. Methods Used in Experimental Investigations of the Acoustic Emission Generated by a SingleTwin. Acoustic Emission Associated with Elastic Twinning. 8. Influence of Reversible Plasticity of Superconductors on Their Physical Properties. Reversible Changes in the Parameters of Traditional Superconductors under the Action of Elastic Stresses. Influence of Magnetic Fields on Reversible Changes in the Parameters

Crystal Plasticity Finite Element Methods Book PDF
✏Book Title : Crystal Plasticity Finite Element Methods
✏Author : Franz Roters
✏Publisher : John Wiley & Sons
✏Release Date : 2011-08-04
✏Pages : 208
✏ISBN : 9783527642090
✏Available Language : English, Spanish, And French

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✏Crystal Plasticity Finite Element Methods Book Summary : Written by the leading experts in computational materials science, this handy reference concisely reviews the most important aspects of plasticity modeling: constitutive laws, phase transformations, texture methods, continuum approaches and damage mechanisms. As a result, it provides the knowledge needed to avoid failures in critical systems udner mechanical load. With its various application examples to micro- and macrostructure mechanics, this is an invaluable resource for mechanical engineers as well as for researchers wanting to improve on this method and extend its outreach.

Formulation And Solution Of A Crystal Plasticity Constitutive Model With Slip Gradient Effects Book PDF
✏Book Title : Formulation and Solution of a Crystal Plasticity Constitutive Model with Slip Gradient Effects
✏Author : Jobie M. Gerken
✏Publisher :
✏Release Date : 2007
✏Pages : 306
✏ISBN : CORNELL:31924095873026
✏Available Language : English, Spanish, And French

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✏Formulation and Solution of a Crystal Plasticity Constitutive Model with Slip Gradient Effects Book Summary : A constitutive model, finite element solution, and simulation results are presented for a crystal plasticity model that includes the stress and strain effects due to a continuous distribution of geometrically necessary dislocations. These dislocations are a result of inhomogeneous plastic slip and are known to affect material behavior when plasticity gradients become large. The foundation of the constitutive model is a three term multiplicative decomposition of the deformation gradient in which the two classical terms of plastic and elastic deformation are included along with an additional term for long range strain due to the collective effects of geometrically necessary dislocations. The long range strain is derived by assuming a bilinear variation in net density of Volterra edge dislocations over a region about a continuum point and then summing the strain contributions from each point in the region. The resulting long range strain is a function of a length parameter, elastic constants, and second gradients of the slip. The constitutive relationship for crystallographic slip is modified to incorporate geometrically necessary dislocations by including the first gradient of slip as an additive term in the total hardness. Postulating the stress as a function of the elastic and long range deformation and the slip as a function of the elastic deformation, the constitutive model for slip then includes a backstress proportional to the long range strain. A finite element solution to the constitutive model starts by converting the second order differential equation describing the material behavior into a weak form that includes boundary conditions for the stress and gradients of slip rate for each slip system. Using this weak form, an incremental finite element method is developed to solve the constitutive model within a finite element solution to the equilibrium equation. Results are presented for tension then compression of a tapered tensile specimen, variable compression of a plate, and cyclic bending of a thin foil. The results show kinematic and isotropic type material yielding behavior that is a result of the inclusion of the effects of geometrically necessary dislocations.

📒Theory Of Dislocations ✍ Peter M. Anderson

Theory Of Dislocations Book PDF
✏Book Title : Theory of Dislocations
✏Author : Peter M. Anderson
✏Publisher : Cambridge University Press
✏Release Date : 2017-01-16
✏Pages : 950
✏ISBN : 9780521864367
✏Available Language : English, Spanish, And French

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✏Theory of Dislocations Book Summary : Originally published: New York: McGraw-Hill, 1967. Editions published: New York: Wiley, 1982, and Malabar, FL: Krieger, 1992.

Single Crystal Gradient Plasticity With An Accumulated Plastic Slip Theory And Applications Book PDF
✏Book Title : Single crystal Gradient Plasticity with an Accumulated Plastic Slip Theory and Applications
✏Author : Eric Bayerschen
✏Publisher : KIT Scientific Publishing
✏Release Date : 2016-12-29
✏Pages : 278
✏ISBN : 9783731506065
✏Available Language : English, Spanish, And French

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✏Single crystal Gradient Plasticity with an Accumulated Plastic Slip Theory and Applications Book Summary :

Multiscale Modelling Of Plasticity And Fracture By Means Of Dislocation Mechanics Book PDF
✏Book Title : Multiscale Modelling of Plasticity and Fracture by Means of Dislocation Mechanics
✏Author : Peter Gumbsch
✏Publisher : Springer Science & Business Media
✏Release Date : 2011-01-30
✏Pages : 394
✏ISBN : 3709102839
✏Available Language : English, Spanish, And French

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✏Multiscale Modelling of Plasticity and Fracture by Means of Dislocation Mechanics Book Summary : The latest state of simulation techniques to model plasticity and fracture in crystalline materials on the nano- and microscale is presented. Discrete dislocation mechanics and the neighbouring fields molecular dynamics and crystal plasticity are central parts. The physical phenomena, the theoretical basics, their mathematical description and the simulation techniques are introduced and important problems from the formation of dislocation structures to fatigue and fracture from the nano- to microscale as well as it’s impact on the macro behaviour are considered.

📒Dislocations In Solids ✍ Frank R.N. Nabarro

Dislocations In Solids Book PDF
✏Book Title : Dislocations in Solids
✏Author : Frank R.N. Nabarro
✏Publisher : Elsevier
✏Release Date : 2002-12-05
✏Pages : 688
✏ISBN : 0080530451
✏Available Language : English, Spanish, And French

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✏Dislocations in Solids Book Summary : Dislocations are lines of irregularity in the structure of a solid analogous to the bumps in a badly laid carpet. Like these bumps, they can be easily moved, and they provide the most important mechanism by which the solid can be deformed. They also have a strong influence on crystal growth and on the electronic properties of semiconductors.

Physics Of Strength And Plasticity Book PDF
✏Book Title : Physics of Strength and Plasticity
✏Author : Ali S. Argon
✏Publisher : Mit Press
✏Release Date : 2003-02-01
✏Pages : 430
✏ISBN : 026251169X
✏Available Language : English, Spanish, And French

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✏Physics of Strength and Plasticity Book Summary : The title of this book is derived from a graduate course in which Professor Egon Orowan presented to M.I.T. students a clear and simple picture of the basic concepts in crystal plasticity and the mechanics of fracture of materials. Since the publication of his pioneering papers on dislocations and atomic mechanisms of fracture in the early 1930's,Professor Orowan has been one of the principal contributors to the field of physics of plasticity and strength. During the past 10 to 15 years, the perfection of many direct experimental methods has caused a great increase of activity in the elucidation of the effects of dislocations on mechanical and physical properties. Equally intensive activity is taking place in the field of physics and mechanics of fracture processes. Professor Ali Argon felt that the retirement of Professor Orowan from the M.I.T. faculty was an appropriate occasion to take stock of the developments in the immediate past and to produce a needed synthesis of this technologically important field. For this purpose he invited 37 of the world's leading figures in the field to contribute theoretical papers of original work. The 17 papers on the Physics of Plasticity fall into two categories: (1) Individual Dislocations and Basic Deformation Mechanisms, and (2) Hardening Mechanisms and Dislocation Dynamics. The 10 papers on the Physics of Strength concentrate on (1) Cracks and Fracture, and (2) Geology.

Advances In Engineering Plasticity Xii Book PDF
✏Book Title : Advances in Engineering Plasticity XII
✏Author : Yeong Maw Hwang
✏Publisher : Trans Tech Publications Ltd
✏Release Date : 2014-08-18
✏Pages : 593
✏ISBN : 9783038266105
✏Available Language : English, Spanish, And French

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✏Advances in Engineering Plasticity XII Book Summary : This special volume includes the papers presented at the 12th Asia-Pacific Conference on Engineering Plasticity and Its Applications (AEPA 2014) held in National Sun Yat-sen University, Kaohsiung, Taiwan on 1-5 September 2014. The 2014 conference features technical and keynote programs, the most current and relevant trends in academia, and industry, and a cultural excursion program. The topics cover engineering plasticity in various disciplines such as materials processing, damage and fracture analysis, impact dynamics, composite mechanics. Advances in plasticity on the nano, micro and macro scales and their industrial applications related to sustainable and re-manufacturing are also included.

Stochastic Studies Of Dislocation Mobility In Bcc Alloys Book PDF
✏Book Title : Stochastic Studies of Dislocation Mobility in BCC Alloys
✏Author : Chaitanya Suresh Deo
✏Publisher :
✏Release Date : 2003
✏Pages :
✏ISBN : UOM:39015060768325
✏Available Language : English, Spanish, And French

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✏Stochastic Studies of Dislocation Mobility in BCC Alloys Book Summary :

Dislocations In Solids Book PDF
✏Book Title : Dislocations in Solids
✏Author :
✏Publisher : Elsevier Science
✏Release Date : 2008-07-02
✏Pages : 650
✏ISBN : CORNELL:31924108529383
✏Available Language : English, Spanish, And French

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✏Dislocations in Solids Book Summary : New models for dislocation structure and motion are presented for nanocrystals, nucleation at grain boundaries, shocked crystals, interphase interfaces, quasicrystals, complex structures with non-planar dislocation cores, and colloidal crystals. A review of experimentally established main features of the magnetoplastic effect with their physical interpretation explains many diverse results of this type. The model has many potential applications for forming processes influenced by magnetic fields. . Dislocation model for the magnetoplastic effect . New mechanism for dislocation nucleation and motion in nanocrystals . New models for the dislocation structure of interfaces between crystals with differing crystallographic structure . A unified view of dislocations in quasicrystals, with a new model for dislocation motion . A general model of dislocation behavior in crystals with non-planar dislocation cores . Dislocation properties at high velocities . Dislocations in colloidal crystals

A Molecular Dynamics Study Of Nanocontact Plasticity And Dislocation Avalanches In Fcc And Bcc Crystals Book PDF
✏Book Title : A Molecular Dynamics Study of Nanocontact Plasticity and Dislocation Avalanches in FCC and BCC Crystals
✏Author : Javier Varillas
✏Publisher :
✏Release Date : 2019
✏Pages : 166
✏ISBN : OCLC:1151077857
✏Available Language : English, Spanish, And French

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✏A Molecular Dynamics Study of Nanocontact Plasticity and Dislocation Avalanches in FCC and BCC Crystals Book Summary : This study aims to investigate the underlying mechanisms which govern the development of dense defect networks in nanoscale crystal plasticity, either under contact and uniaxial loading conditions, with emphasis on the onset of intermittent avalanche phenomena. The investigation is based on a comprehensive set of massive molecular dynamics (MD) simulations performed with embedded-atom method potentials in face-centered cubic (FCC) and body-centered cubic (BCC) crystals. The first part of the thesis concerns the combined role of elasticity and plasticity in nanocontact loadings, where attention is given to the mechanisms leading to the formation of a permanent nanoimprint as well as to the onset of material pile-up at the contact vicinity. It is found that the topographical arrangement of the slip traces emitted at the surface into specific deformation patterns is a distinctive feature of the underlying dislocation glide and twinning processes occurring in FCC and BCC crystals as a function of temperature and surface orientation. A mechanistic analysis is made on the influence of the defect nucleation events in conjunction with the development of entangled defect networks upon the material hardness and its evolution towards a plateau level with increasing indenter-tip penetration. Complementary MD simulations of the uniaxial stress-strain curve of the plastically deformed region are carried out with the purpose of establishing a direct correlation between nanoscale material responses attaining under uniaxial and contact loading conditions. The results of this comparison illustrate on the key role played by defect nucleation processes on the formation of permanent nanoimprints, which differs from the conventional view in that in micro and macroscopic scales imprint formation is essentially governed by the evolutionary character of a preexisting (entangled) defect network: the greater the dislocation density, the larger the measured hardness. In overall, this work provides a fundamental insight into the understanding of why BCC surfaces are harder than FCC surfaces at the nanoscale. A statistical physics background is devised to investigate the influence of the dislocation mechanisms on the onset of avalanche events that are inherent to crystal plasticity. The analysis is predicated upon the notion in that the size distribution of such avalanches follows power-law scaling. To investigate the avalanche size distributions in cubic crystals, a group of novel MD simulations are performed where the computational cells containing a periodic arrangement of a preexisting dislocation network are subjected to uniaxial straining under displacement control at different strain rates and temperatures. Under sufficiently slow driving, the dislocation networks evolve through the emission of dislocation avalanches which do not overlap in time. This illustrates that the mobilized entangled dislocation arrangements exhibit quiescent periods during each plastic (dissipative) event, enabling comparison with experimental results which are also performed under strict displacement controlled conditions. The results illustrate on the attainment of a transitional slip size separating two power-law avalanche regimes as a function of the fundamental dislocation glide processes at the crossroads of self-organized and tuned criticality models. Detailed analyses of the MD simulations furnish specific mechanisms characterizing dislocation avalanche emission and propagation in FCC and BCC metals throughout a wide temperature range, which is central in supporting the onset of the aforementioned two power-law regimes.

Iutam Symposium On Mesoscopic Dynamics Of Fracture Process And Materials Strength Book PDF
✏Book Title : IUTAM Symposium on Mesoscopic Dynamics of Fracture Process and Materials Strength
✏Author : H. Kitagawa
✏Publisher : Springer Science & Business Media
✏Release Date : 2004-05-26
✏Pages : 448
✏ISBN : 1402020376
✏Available Language : English, Spanish, And French

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✏IUTAM Symposium on Mesoscopic Dynamics of Fracture Process and Materials Strength Book Summary : This volume contains the papers presented at the IUT AM Symposium of "Mesoscopic Dynamics of Fracture Process and Materials Strength", held in July 2003, at the Hotel Osaka Sun Palace, Osaka, Japan. The Symposium was proposed in 2001, aiming at organizing concentrated discussions on current understanding of fracture process and inhomogeneous deformation governing the materials strength with emphasis on the mesoscopic dynamics associated with evolutional mechanical behaviour under micro/macro mutual interaction. The decision of the General Assembly of International Union of Theoretical and Applied Mechanics (IUT AM) to accept our proposal was well-timed and attracted attention. Driven by the development of new theoretical and computational techniques, various novel challenges to investigate the mesoscopic dynamics have been actively done recently, including large-scaled 3D atomistic simulations, discrete dislocation dynamics and other micro/mesoscopic computational analyses. The Symposium attracted sixty-six participants from eight countries, and forty two papers were presented. The presentations comprised a wide variety of fundamental subjects of physics, mechanical models, computational strategies as well as engineering applications. Among the subjects, discussed are (a) dislocation patterning, (b) crystal plasticity, (c) characteristic fracture of amorphous/nanocrystal, (d) nano-indentation, (e) ductile-brittle transition, (f) ab-initio calculation, (g) computational methodology for multi-scale analysis and others.

Dislocation Dynamics And Plasticity Book PDF
✏Book Title : Dislocation Dynamics and Plasticity
✏Author : Taira Suzuki
✏Publisher : Springer Science & Business Media
✏Release Date : 2013-03-07
✏Pages : 228
✏ISBN : 9783642757747
✏Available Language : English, Spanish, And French

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✏Dislocation Dynamics and Plasticity Book Summary : In the 1950s the direct observation of dislocations became possible, stimulat ing the interest of many research workers in the dynamics of dislocations. This led to major contributions to the understanding of the plasticity of various crys talline materials. During this time the study of metals and alloys of fcc and hcp structures developed remarkably. In particular, the discovery of the so-called in ertial effect caused by the electron and phonon frictional forces greatly influenced the quantitative understanding of the strength of these metallic materials. Statis tical studies of dislocations moving through random arrays of point obstacles played an important role in the above advances. These topics are described in Chaps. 2-4. Metals and alloys with bcc structure have large Peierls forces compared to those with fcc structure. The reasons for the delay in studying substances with bcc structure were mostly difficulties connected with the purification techniques and with microscopic studies of the dislocation core. In the 1970s, these difficulties were largely overcome by developments in experimental techniques and computer physics. Studies of dislocations in ionic and covalent bonding materials with large Peierls forces provided infonnation about the core structures of dislocations and their electronic interactions with charged particles. These are the main subjects in Chaps. 5-7.