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A new thermo-elasto-plasticity constitutive theory for polycrystalline metals
Chen C(陈岑); Tang QH(汤奇恒); Wang ZQ(王自强)
Source PublicationACTA MECHANICA SINICA
2015-06-01
Volume31Issue:3Pages:338-348
ISSN0567-7718
Abstract

In this study, the behavior of polycrystalline metals at different temperatures is investigated by a new thermo-elasto-plasticity constitutive theory. Based on solid mechanical and interatomic potential, the constitutive equation is established using a new decomposition of the deformation gradient. For polycrystalline copper and magnesium, the stress-strain curves from 77 to 764 K (copper), and 77 to 870 K (magnesium) under quasi-static uniaxial loading are calculated, and then the calculated results are compared with the experiment results. Also, it is determined that the present model has the capacity to describe the decrease of the elastic modulus and yield stress with the increasing temperature, as well as the change of hardening behaviors of the polycrystalline metals. The calculation process is simple and explicit, which makes it easy to implement into the applications.;In this study, the behavior of polycrystalline metals at different temperatures is investigated by a new thermo-elasto-plasticity constitutive theory. Based on solid mechanical and interatomic potential, the constitutive equation is established using a new decomposition of the deformation gradient. For polycrystalline copper and magnesium, the stress-strain curves from 77 to 764 K (copper), and 77 to 870 K (magnesium) under quasi-static uniaxial loading are calculated, and then the calculated results are compared with the experiment results. Also, it is determined that the present model has the capacity to describe the decrease of the elastic modulus and yield stress with the increasing temperature, as well as the change of hardening behaviors of the polycrystalline metals. The calculation process is simple and explicit, which makes it easy to implement into the applications.

KeywordThermo-elasto-plasticity Constitutive Theory Yield Stress Hardening Behaviors Finite Temperature
Subject AreaEngineering ; Mechanics
DOI10.1007/s10409-015-0462-1
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000357448500005
WOS KeywordMagnesium Alloy Az31b ; Finite-element-method ; Elevated-temperatures ; Crystal Plasticity ; Single-crystals ; Strain-rate ; Texture Evolution ; Flow-stress ; Hcp Metals ; Wide-range
WOS Research AreaEngineering ; Mechanics
WOS SubjectEngineering, Mechanical ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [11021262, 11172303, 11132011] ; National Basic Research Program of China [2012CB937500]
DepartmentLNM固体物理力学
Classification二类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/55335
Collection非线性力学国家重点实验室
Corresponding AuthorWang ZQ(王自强)
AffiliationChinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Chen C,Tang QH,Wang ZQ. A new thermo-elasto-plasticity constitutive theory for polycrystalline metals[J]. ACTA MECHANICA SINICA,2015,31(3):338-348.
APA Chen C,Tang QH,&Wang ZQ.(2015).A new thermo-elasto-plasticity constitutive theory for polycrystalline metals.ACTA MECHANICA SINICA,31(3),338-348.
MLA Chen C,et al."A new thermo-elasto-plasticity constitutive theory for polycrystalline metals".ACTA MECHANICA SINICA 31.3(2015):338-348.
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