| 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.
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| Source Publication | INTERNATIONAL JOURNAL OF APPLIED MECHANICS
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| 2013-03-01 | |
| Volume | 5Issue:1Pages:1350004/1-1350004/20 |
| ISSN | 1758-8251 |
| Abstract | 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. |
| Keyword | Intergranular Fracture Nanocrystalline Metal Mixed-mode Cohesive Model Finite Element Method |
| Subject Area | 新型材料的力学问题 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000318307300004 |
| Funding Organization | National Basic Research Program of China [2012CB937500]; National Natural Science Foundation of China [11021262, 10932011, 91116003] |
| Department | LNM新型材料及结构的多尺度力学 |
| Classification | 二类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47279 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Chen, 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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