January 16, 2021

Download Ebook Free Dislocation Mechanism-Based Crystal Plasticity

Dislocation Mechanism-Based Crystal Plasticity

Dislocation Mechanism-Based Crystal Plasticity
Author : Zhuo Zhuang,Zhanli Liu,Yinan Cui
Publisher : Academic Press
Release Date : 2019-04-12
Category : Technology & Engineering
Total pages :450
GET BOOK

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

Dislocation Mechanism-based Crystal Plasticity

Dislocation Mechanism-based Crystal Plasticity
Author : 庄茁,柳占立,崔一南
Publisher : Unknown
Release Date : 2020
Category : Crystals
Total pages :436
GET BOOK

Crystal Plasticity Finite Element Methods

Crystal Plasticity Finite Element Methods
Author : Franz Roters,Philip Eisenlohr,Thomas R. Bieler,Dierk Raabe
Publisher : John Wiley & Sons
Release Date : 2011-08-04
Category : Technology & Engineering
Total pages :208
GET BOOK

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.

Dislocation Dynamics

Dislocation Dynamics
Author : Alan R. Rosenfield
Publisher : Unknown
Release Date : 1968
Category : Creep of metals
Total pages :776
GET BOOK

The Investigation of Plastic Behavior by Discrete Dislocation Dynamics for Single Crystal Pillar at Submicron Scale

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
Category : Technology & Engineering
Total pages :131
GET BOOK

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

Single Crystal Plasticity by Modeling Dislocation Density Rate Behavior
Author : Anonim
Publisher : Unknown
Release Date : 2010
Category :
Total pages :129
GET BOOK

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

Strengthening Mechanisms in Crystal Plasticity
Author : Ali Argon
Publisher : Oxford University Press on Demand
Release Date : 2008
Category : Science
Total pages :404
GET BOOK

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.

Magnesium Technology 2017

Magnesium Technology 2017
Author : Kiran N. Solanki,Dmytro Orlov,Alok Singh,Neale R. Neelameggham
Publisher : Springer
Release Date : 2017-02-14
Category : Technology & Engineering
Total pages :689
GET BOOK

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

Mesoscale Models
Author : Sinisa Mesarovic,Samuel Forest,Hussein Zbib
Publisher : Springer
Release Date : 2018-11-19
Category : Science
Total pages :344
GET BOOK

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,

Dislocation Dynamics and Plasticity

Dislocation Dynamics and Plasticity
Author : Taira Suzuki,Shin Takeuchi,Hideo Yoshinaga
Publisher : Springer Science & Business Media
Release Date : 2013-03-07
Category : Science
Total pages :228
GET BOOK

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.

Crystal Dislocations: Their Impact on Physical Properties of Crystals

Crystal Dislocations: Their Impact on Physical Properties of Crystals
Author : Peter Lagerlof
Publisher : MDPI
Release Date : 2019-01-09
Category :
Total pages :316
GET BOOK

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

High-Resolution Crystal Plasticity Simulations

High-Resolution Crystal Plasticity Simulations
Author : Martin Diehl
Publisher : Apprimus Wissenschaftsverlag
Release Date : 2016-03-02
Category : Technology & Engineering
Total pages :138
GET BOOK

In this work the possibilities and capabilities of high-resolution crystal plasticity simulations are presented and discussed. Giving several examples, it is shown how the application of crystal plasticity simulations helps to understand the micro-mechanical behaviour of crystalline materials. To avoid the high computational costs associated with crystal plasticity simulations that arise from (i) the evaluation of the selected constitutive law, and (ii) the solution of the associated mechanical boundary value problem, both contributions to the runtime have to be kept small. This is done by (i) employing a rather simple—and therefore fast—constitutive model, and by (ii) using an effective spectral method employing fast Fourier transforms for solving the partial differential equations describing the mechanical behaviour. Here, an improved spectral solver incorporated into the Düsseldorf Advanced Material Simulation Kit (DAMASK) is used.

Thermally Activated Mechanisms in Crystal Plasticity

Thermally Activated Mechanisms in Crystal Plasticity
Author : D. Caillard,J.L. Martin
Publisher : Elsevier
Release Date : 2003-09-08
Category : Technology & Engineering
Total pages :452
GET BOOK

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.

Unified Constitutive Laws of Plastic Deformation

Unified Constitutive Laws of Plastic Deformation
Author : A. S. Krausz,K. Krausz
Publisher : Elsevier
Release Date : 1996-05-31
Category : Technology & Engineering
Total pages :463
GET BOOK

High-technology industries using plastic deformation demand soundly-based economical decisions in manufacturing design and product testing, and the unified constitutive laws of plastic deformation give researchers aguideline to use in making these decisions. This book provides extensive guidance in low cost manufacturing without the loss of product quality. Each highly detailed chapter of Unified Constitutive Laws of Plastic Deformation focuses on a distinct set of defining equations. Topics covered include anisotropic and viscoplastic flow, and the overall kinetics and thermodynamics of deformation. This important book deals with a prime topic in materials science and engineering, and will be of great use toboth researchers and graduate students. Describes the theory and applications of the constitutive law of plastic deformation for materials testing Examines the constitutive law of plastic deformation as it applies to process and product design Includes a program on disk for the determination and development of the constitutive law of plastic deformation Considers economical design and testing methods

Single-crystal Gradient Plasticity with an Accumulated Plastic Slip: Theory and Applications

Single-crystal Gradient Plasticity with an Accumulated Plastic Slip: Theory and Applications
Author : Eric Bayerschen
Publisher : KIT Scientific Publishing
Release Date : 2016-12-29
Category :
Total pages :278
GET BOOK