Characterizations of size effect and overall mechanical behavior of nanocrystalline metals

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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.
发表期刊	INTERNATIONAL JOURNAL OF APPLIED MECHANICS
	2013-03-01
卷号	5 期号:1 页码:1350004/1-1350004/20
ISSN	1758-8251
摘要	A 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.
关键词	Intergranular Fracture Nanocrystalline Metal Mixed-mode Cohesive Model Finite Element Method
学科领域	新型材料的力学问题
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收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000318307300004
项目资助者	National Basic Research Program of China [2012CB937500]; National Natural Science Foundation of China [11021262, 10932011, 91116003]
课题组名称	LNM新型材料及结构的多尺度力学
论文分区	二类
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47279
专题	非线性力学国家重点实验室
通讯作者	Chen, L (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 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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