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Size Effects In Plasticity

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Size Effects in Plasticity

Size Effects in Plasticity Book
Author : George Voyiadjis,Mohammadreza Yaghoobi
Publisher : Academic Press
Release : 2019-08-01
ISBN : 0128135131
Language : En, Es, Fr & De

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Book Description :

Size Effects in Plasticity: From Macro to Nano provides concise explanations of all available methods in this area, from atomistic simulation, to non-local continuum models to capture size effects. It then compares their applicability to a wide range of research scenarios. This essential guide addresses basic principles, numerical issues and computation, applications and provides code which readers can use in their own modeling projects. Researchers in the fields of computational mechanics, materials science and engineering will find this to be an ideal resource when they address the size effects observed in deformation mechanisms and strengths of various materials. Provides a comprehensive reference on the field of size effects and a review of mechanics of materials research in all scales Explains all major methods of size effects simulation, including non-local continuum models, non-local crystal plasticity, discrete dislocation methods and molecular dynamics Includes source codes that readers can use in their own projects

Dislocation Mechanism Based Crystal Plasticity

Dislocation Mechanism Based Crystal Plasticity Book
Author : Zhuo Zhuang,Zhanli Liu,Yinan Cui
Publisher : Academic Press
Release : 2019-04-12
ISBN : 0128145927
Language : En, Es, Fr & De

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Book Description :

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

Dislocations Mesoscale Simulations and Plastic Flow

Dislocations  Mesoscale Simulations and Plastic Flow Book
Author : Ladislas Kubin
Publisher : Oxford University Press
Release : 2013-04-18
ISBN : 019852501X
Language : En, Es, Fr & De

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Book Description :

In the past twenty years, new experimental approaches, improved models and progress in simulation techniques brought new insights into long-standing issues concerning dislocation-based plasticity in crystalline materials. Dislocation dynamics simulations are becoming accessible to a wide range of users. This book presents to students and researchers in materials science and mechanical engineering a comprehensive coverage of the physical body of knowledge on whichthey are based. This includes classical studies, which are too often ignored, recent experimental and theoretical advances, as well as a discussion of selected applications on various topics.

IUTAM Symposium on Size Effects on Material and Structural Behavior at Micron and Nano Scales

IUTAM Symposium on Size Effects on Material and Structural Behavior at Micron  and Nano Scales Book
Author : Q. P. Sun,P. Tong
Publisher : Springer Science & Business Media
Release : 2006-09-19
ISBN : 1402049463
Language : En, Es, Fr & De

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Book Description :

This volume is a collection of twenty five written contributions by distinguished invited speakers from seven countries to the IUTAM Symposium on Size Effects on Material and Structural Behavior at Micron- and Nano-scales. Size effects on material and structural behaviors are of great interest to physicists, material scientists, and engineers who need to understand and model the mechanical behavior of solids especially at micron- and nano-scales.

Fracture and Size Effect in Concrete and Other Quasibrittle Materials

Fracture and Size Effect in Concrete and Other Quasibrittle Materials Book
Author : Zdenek P. Bazant
Publisher : Routledge
Release : 2019-03-04
ISBN : 1351447289
Language : En, Es, Fr & De

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Book Description :

Fracture and Size Effect in Concrete and Other Quasibrittle Materials is the first in-depth text on the application of fracture mechanics to the analysis of failure in concrete structures. The book synthesizes a vast number of recent research results in the literature to provide a comprehensive treatment of the topic that does not give merely the facts - it provides true understanding. The many recent results on quasibrittle fracture and size effect, which were scattered throughout many periodicals, are compiled here in a single volume. This book presents a well-rounded discussion of the theory of size effect and scaling of failure loads in structures. The size effect, which is the most important practical manifestation of fracture behavior, has become a hot topic. It has gained prominence in current research on concrete and quasibrittle materials. The treatment of every subject in Fracture and Size Effect in Concrete and Other Quasibrittle Materials proceeds from simple to complex, from specialized to general, and is as concise as possible using the simplest level of mathematics necessary to treat the subject clearly and accurately. Whether you are an engineering student or a practicing engineer, this book provides you with a clear presentation, including full derivations and examples, from which you can gain real understanding of fracture and size effect in concrete and other quasibrittle materials.

Gradient Enhanced Continuum Plasticity

Gradient Enhanced Continuum Plasticity Book
Author : George Z. Voyiadjis,Yooseob Song
Publisher : Elsevier
Release : 2020-03-27
ISBN : 0128177675
Language : En, Es, Fr & De

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Book Description :

Gradient-Enhanced Continuum Plasticity provides an expansive review of gradient-enhanced continuum plasticity from the initial stage to current research trends in experimental, theoretical, computational and numerical investigations. Starting with an overview of continuum mechanics and classical plasticity, the book then delves into concise lessons covering basic principles and applications, such as outlining the use of the finite element method to solve problems with size effects, mesh sensitivity and high velocity impact loading. All major theories are explored, providing readers with a guide to understanding the various concepts of and differences between an array of gradient-enhanced continuum plasticity models. Outlines the concepts of, and differences between, various gradient-enhanced continuum plasticity models Provides guidance on problem-solving for size effects, mesh-sensitivity tests and thermo-mechanical coupling Reviews experimental, numerical and theoretical issues in gradient-enhanced continuum plasticity Describes micromechanical aspects from experimental observations

Emergent neural computation from the interaction of different forms of plasticity

Emergent neural computation from the interaction of different forms of plasticity Book
Author : Cristina Savin,Matthieu Gilson,Friedemann Zenke
Publisher : Frontiers Media SA
Release : 2016-03-22
ISBN : 2889197883
Language : En, Es, Fr & De

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Book Description :

From the propagation of neural activity through synapses, to the integration of signals in the dendritic arbor, and the processes determining action potential generation, virtually all aspects of neural processing are plastic. This plasticity underlies the remarkable versatility and robustness of cortical circuits: it enables the brain to learn regularities in its sensory inputs, to remember the past, and to recover function after injury. While much of the research into learning and memory has focused on forms of Hebbian plasticity at excitatory synapses (LTD/LTP, STDP), several other plasticity mechanisms have been characterized experimentally, including the plasticity of inhibitory circuits (Kullmann, 2012), synaptic scaling (Turrigiano, 2011) and intrinsic plasticity (Zhang and Linden, 2003). However, our current understanding of the computational roles of these plasticity mechanisms remains rudimentary at best. While traditionally they are assumed to serve a homeostatic purpose, counterbalancing the destabilizing effects of Hebbian learning, recent work suggests that they can have a profound impact on circuit function (Savin 2010, Vogels 2011, Keck 2012). Hence, theoretical investigation into the functional implications of these mechanisms may shed new light on the computational principles at work in neural circuits. This Research Topic of Frontiers in Computational Neuroscience aims to bring together recent advances in theoretical modeling of different plasticity mechanisms and of their contributions to circuit function. Topics of interest include the computational roles of plasticity of inhibitory circuitry, metaplasticity, synaptic scaling, intrinsic plasticity, plasticity within the dendritic arbor and in particular studies on the interplay between homeostatic and Hebbian plasticity, and their joint contribution to network function.

Size Effects in Crystal Plasticity

Size Effects in Crystal Plasticity Book
Author : Ulrik Borg,Technical University of Denmark.. Department of Mechanical Engineering
Publisher : Unknown
Release : 2007
ISBN : 9788774753421
Language : En, Es, Fr & De

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Book Description :

Download Size Effects in Crystal Plasticity book written by Ulrik Borg,Technical University of Denmark.. Department of Mechanical Engineering, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Dislocation Mechanics of Metal Plasticity and Fracturing

Dislocation Mechanics of Metal Plasticity and Fracturing Book
Author : Ronald W. Armstrong
Publisher : MDPI
Release : 2020-11-03
ISBN : 3039432648
Language : En, Es, Fr & De

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Book Description :

The modern understanding of metal plasticity and fracturing began about 100 years ago, with pioneering work; first, on crack-induced fracturing by Griffith and, second, with the invention of dislocation-enhanced crystal plasticity by Taylor, Orowan and Polanyi. The modern counterparts are fracture mechanics, as invented by Irwin, and dislocation mechanics, as initiated in pioneering work by Cottrell. No less important was the breakthrough development of optical characterization of sectioned polycrystalline metal microstructures started by Sorby in the late 19th century and leading eventually to modern optical, x-ray and electron microscopy methods for assessments of crystal fracture surfaces, via fractography, and particularly of x-ray and electron microscopy techniques applied to quantitative characterizations of internal dislocation behaviors. A major current effort is to match computational simulations of metal deformation/fracturing behaviors with experimental measurements made over extended ranges of microstructures and over varying external conditions of stress-state, temperature and loading rate. The relation of such simulations to the development of constitutive equations for a hoped-for predictive description of material deformation/fracturing behaviors is an active topic of research. The present collection of articles provides a broad sampling of research accomplishments on the two subjects.

Crystal Plasticity at Micro and Nano scale Dimensions

Crystal Plasticity at Micro  and Nano scale Dimensions Book
Author : Ronald W. Armstrong,Wayne L. Elban
Publisher : MDPI
Release : 2021-08-31
ISBN : 3036508740
Language : En, Es, Fr & De

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Book Description :

The present collection of articles focuses on the mechanical strength properties at micro- and nanoscale dimensions of body-centered cubic, face-centered cubic and hexagonal close-packed crystal structures. The advent of micro-pillar test specimens is shown to provide a new dimensional scale for the investigation of crystal deformation properties. The ultra-small dimensional scale at which these properties are measured is shown to approach the atomic-scale level at which model dislocation mechanics descriptions of crystal slip and deformation twinning behaviors are proposed to be operative, including the achievement of atomic force microscopic measurements of dislocation pile-up interactions with crystal grain boundaries or with hard surface coatings. A special advantage of engineering designs made at such small crystal and polycrystalline dimensions is the achievement of an approximate order-of-magnitude increase in mechanical strength levels. Reasonable extrapolation of macro-scale continuum mechanics descriptions of crystal strength properties at micro- to nano-indentation hardness measurements are demonstrated, in addition to reports on persistent slip band observations and fatigue cracking behaviors. High-entropy alloy, superalloy and energetic crystal properties are reported along with descriptions of deformation rate sensitivities, grain boundary structures, nano-cutting, void nucleation/growth micromechanics and micro-composite electrical properties.

Mechanics of Strain Gradient Materials

Mechanics of Strain Gradient Materials Book
Author : Albrecht Bertram,Samuel Forest
Publisher : Springer Nature
Release : 2020-06-30
ISBN : 3030438309
Language : En, Es, Fr & De

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Book Description :

Over the past 50 years, strain gradient material theories have been developed for the continuum modeling of size effects in materials and structures in terms of their elasticity, plasticity and fracturing. This book puts forward a unifying perspective to combine existing theories involving the higher order gradient of the strain tensor, or of plastic strain. It begins by reviewing experimental findings on the existence (or non-existence) of size effects on the mechanics of materials. In turn, the book devises first, second and higher order strain gradient theories from general principles, and presents constitutive frameworks that satisfy thermodynamic requirements. The special case of strain gradient plasticity is then developed and illustrated via computational analyses of size effects on the plasticity of metals at small scales. In closing, the book explains the origin of gradient effects in the case of lattice structures by drawing on homogenization theory.

Plasticity

Plasticity Book
Author : S. Nemat-Nasser
Publisher : Cambridge University Press
Release : 2004-11-29
ISBN : 9780521839792
Language : En, Es, Fr & De

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Book Description :

Publisher Description

Plasticity

Plasticity Book
Author : Weimin Han,B. Daya Reddy
Publisher : Springer Science & Business Media
Release : 2012-11-19
ISBN : 1461459400
Language : En, Es, Fr & De

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Book Description :

This book focuses on the theoretical aspects of small strain theory of elastoplasticity with hardening assumptions. It provides a comprehensive and unified treatment of the mathematical theory and numerical analysis. It is divided into three parts, with the first part providing a detailed introduction to plasticity, the second part covering the mathematical analysis of the elasticity problem, and the third part devoted to error analysis of various semi-discrete and fully discrete approximations for variational formulations of the elastoplasticity. This revised and expanded edition includes material on single-crystal and strain-gradient plasticity. In addition, the entire book has been revised to make it more accessible to readers who are actively involved in computations but less so in numerical analysis. Reviews of earlier edition: “The authors have written an excellent book which can be recommended for specialists in plasticity who wish to know more about the mathematical theory, as well as those with a background in the mathematical sciences who seek a self-contained account of the mechanics and mathematics of plasticity theory.” (ZAMM, 2002) “In summary, the book represents an impressive comprehensive overview of the mathematical approach to the theory and numerics of plasticity. Scientists as well as lecturers and graduate students will find the book very useful as a reference for research or for preparing courses in this field.” (Technische Mechanik) "The book is professionally written and will be a useful reference to researchers and students interested in mathematical and numerical problems of plasticity. It represents a major contribution in the area of continuum mechanics and numerical analysis." (Math Reviews)

Mechanics and Physics of Solids at Micro and Nano Sscales

Mechanics and Physics of Solids at Micro  and Nano Sscales Book
Author : Ioan R. Ionescu,Sylvain Queyreau,Catalin R. Picu,Oguz Umut Salman
Publisher : John Wiley & Sons
Release : 2020-01-09
ISBN : 1786305313
Language : En, Es, Fr & De

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Book Description :

Chronicling the 11th US–France Mechanics and physics of solids at macro- and nano-scales symposium, organized by ICACM (International Center for Applied Computational Mechanics) in Paris, June 2018, this book addresses the breadth of issues raised. It covers a comprehensive range of scientific and technological topics (from elementary plastic events in metals and materials in harsh environments to bio-engineered and bio-mimicking materials), offering a representative perspective on state-of-the-art research and materials. Expounding on the issues related to mesoscale modeling, the first part of the book addresses the representation of plastic deformation at both extremes of the scale – between nano- and macro- levels. The second half of the book examines the mechanics and physics of soft materials, polymers and materials made from fibers or molecular networks.

Analysis and Computation of Microstructure in Finite Plasticity

Analysis and Computation of Microstructure in Finite Plasticity Book
Author : Sergio Conti,Klaus Hackl
Publisher : Springer
Release : 2015-04-23
ISBN : 3319182420
Language : En, Es, Fr & De

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Book Description :

This book addresses the need for a fundamental understanding of the physical origin, the mathematical behavior and the numerical treatment of models which include microstructure. Leading scientists present their efforts involving mathematical analysis, numerical analysis, computational mechanics, material modelling and experiment. The mathematical analyses are based on methods from the calculus of variations, while in the numerical implementation global optimization algorithms play a central role. The modeling covers all length scales, from the atomic structure up to macroscopic samples. The development of the models ware guided by experiments on single and polycrystals and results will be checked against experimental data.

Plasticity and Beyond

Plasticity and Beyond Book
Author : Jörg Schröder,Klaus Hackl
Publisher : Springer Science & Business Media
Release : 2013-09-20
ISBN : 3709116252
Language : En, Es, Fr & De

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Book Description :

The book presents the latest findings in experimental plasticity, crystal plasticity, phase transitions, advanced mathematical modeling of finite plasticity and multi-scale modeling. The associated algorithmic treatment is mainly based on finite element formulations for standard (local approach) as well as for non-standard (non-local approach) continua and for pure macroscopic as well as for directly coupled two-scale boundary value problems. Applications in the area of material design/processing are covered, ranging from grain boundary effects in polycrystals and phase transitions to deep-drawing of multiphase steels by directly taking into account random microstructures.

IUTAM Symposium on Smart Structures and Structronic Systems

IUTAM Symposium on Smart Structures and Structronic Systems Book
Author : Ulrich Gabbert,Hornsen Tzou
Publisher : Springer Science & Business Media
Release : 2001-06-30
ISBN : 9780792369684
Language : En, Es, Fr & De

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Book Description :

Proceedings of the IUTAM Symposium on Smart Structures and Structronic Systems, held in Magdeburg, Germany, 26-29 September 2000

Handbook of Advanced Ceramics

Handbook of Advanced Ceramics Book
Author : Anonim
Publisher : Academic Press
Release : 2013-04-11
ISBN : 0123854709
Language : En, Es, Fr & De

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Book Description :

This new handbook will be an essential resource for ceramicists. It includes contributions from leading researchers around the world and includes sections on Basic Science of Advanced Ceramics, Functional Ceramics (electro-ceramics and optoelectro-ceramics) and engineering ceramics. Contributions from more than 50 leading researchers from around the world Covers basic science of advanced ceramics, functional ceramics (electro-ceramics and optoelectro-ceramics), and engineering ceramics Approximately 750 illustrations

Numerically Efficient Gradient Crystal Plasticity with a Grain Boundary Yield Criterion and Dislocation based Work Hardening

Numerically Efficient Gradient Crystal Plasticity with a Grain Boundary Yield Criterion and Dislocation based Work Hardening Book
Author : Wulfinghoff, Stephan
Publisher : KIT Scientific Publishing
Release : 2014-12-10
ISBN : 3731502453
Language : En, Es, Fr & De

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Book Description :

Download Numerically Efficient Gradient Crystal Plasticity with a Grain Boundary Yield Criterion and Dislocation based Work Hardening book written by Wulfinghoff, Stephan, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.