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Characterizations of size effect and overall mechanical behavior of nanocrystalline metals
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 APPLIED MECHANICS
2013-03-01
Volume5Issue:1Pages:1350004/1-1350004/20
ISSN1758-8251
AbstractA systematical study of size effects and mechanical behaviors for the nanocrystalline (nc) metals is performed. The grain boundary fracture process is considered and described by the mixed-mode interface cohesive model. The grain material is characterized by the conventional theory of strain gradient plasticity. In the present investigation, the effects of five important parameters on the overall mechanical behavior are studied systematically, which include the grain size, critical separation strength, energy release rate of interface separation, mixity of separation strength, as well as the mixity of separation energy release rate. A finite element method (FEM) covering the above characteristics within the grain and on the grain boundary is developed. The present results show that the overall strength and ductility of the nc metals strongly depend on the grain boundary features described by the mixed-mode cohesive interface model, and there is a competition of deformation of grain boundary with that of grain interior.
KeywordIntergranular Fracture Nanocrystalline Metal Mixed-mode Cohesive Model Finite Element Method
Subject Area新型材料的力学问题
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000318307300004
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
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47279
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 . Characterizations of size effect and overall mechanical behavior of nanocrystalline metals[J]. INTERNATIONAL JOURNAL OF APPLIED MECHANICS,2013,5(1):1350004/1-1350004/20.
APA Chen L,Wei YG,&Chen, L .(2013).Characterizations of size effect and overall mechanical behavior of nanocrystalline metals.INTERNATIONAL JOURNAL OF APPLIED MECHANICS,5(1),1350004/1-1350004/20.
MLA Chen L,et al."Characterizations of size effect and overall mechanical behavior of nanocrystalline metals".INTERNATIONAL JOURNAL OF APPLIED MECHANICS 5.1(2013):1350004/1-1350004/20.
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