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Overall mechanical behavior of nanocrystalline materials accompanied by damage evolution on grain boundaries
Chen L(陈力); Wei YG(魏悦广); Chen, L (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Source PublicationINTERNATIONAL JOURNAL OF DAMAGE MECHANICS
2014-01
Volume23Issue:1Pages:25-42
ISSN1056-7895
AbstractIn the present research, overall mechanical behaviors of the nanocrystalline materials considering the grain boundary damage evolutions are investigated systematically. A mixed-mode cohesive interface model is used to describe the mixed deformation and fracture process of grain boundaries. Based on the mixed-mode cohesive interface model, the grain boundary damage and damage evolution are defined and characterized. In order to describe the size effect, the strain gradient plasticity theory is used for grain materials. In the present results, the overall stress-strain relations and the corresponding damage evolution curves are obtained as functions of several independent parameters, such as the mixed separation strength, the mixed critical energy release rate, grain size, Young's modulus as well as strain hardening exponent. The present results show that both the overall strength and ductility of the nanocrystalline materials are closely dependent on the grain boundary strength and the damage evolution behaviors. By means of the damage evolution relations, the features of the overall stress-strain curves can be clearly interpreted.
KeywordGrain Boundary Damage Evolution Fracture Nanocrystalline Metals Mixed-mode Cohesive Model Finite Element Method
Subject Area固体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000328669700002
Funding OrganizationNational Basic Research Program of China [2012CB937500]; National Natural Science Foundation of China [11021262, 10932011, 91116003]
DepartmentLNM新型材料及结构的多尺度力学
Classification二类/Q2
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/48084
Collection非线性力学国家重点实验室
Corresponding AuthorChen, L (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Chen L,Wei YG,Chen, L . Overall mechanical behavior of nanocrystalline materials accompanied by damage evolution on grain boundaries[J]. INTERNATIONAL JOURNAL OF DAMAGE MECHANICS,2014,23(1):25-42.
APA Chen L,Wei YG,&Chen, L .(2014).Overall mechanical behavior of nanocrystalline materials accompanied by damage evolution on grain boundaries.INTERNATIONAL JOURNAL OF DAMAGE MECHANICS,23(1),25-42.
MLA Chen L,et al."Overall mechanical behavior of nanocrystalline materials accompanied by damage evolution on grain boundaries".INTERNATIONAL JOURNAL OF DAMAGE MECHANICS 23.1(2014):25-42.
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