中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Quasicontinuum simulation of crack propagation in nanocrystalline Ni

文献类型:期刊论文

作者Y. F. Shao ; S. Q. Wang
刊名Acta Physica Sinica
出版日期2010
卷号59期号:10页码:7258-7265
关键词multiscale simulation nanomaterials crack deformation twin molecular-dynamics deformation solids metals nickel tip fracture models
ISSN号1000-3290
中文摘要The propagation process of crack in the nanocrystalline Ni is simulated via the quasicontinuum method. The results show that the stress near the crack tip could prompt the disassociation of grain boundaries, and the formation of stacking faults and deformation twins. Farther front the crack tip, fewer deformation twins can be found. There are more stacking faults than deformation twins in the grains, which approximately have the same distance to the crack tip. The effect on deformation twins front the variation of local stress and generalized planar fault energies is manifested by these results. The distribution of hydrostatic stress on atomic-level around the crack tip is also calculated. It is shown that nanovoids can be easily created in grain boundaries in front of the crack tip. There exists an intense tensile stress state in the grain boundary regions around these nanovoids. As a result of the stress accumulation, the crack propagates along the grain boundaries. Our simulated results qualitatively uncover the propagation process of crack in nanocrystalline Ni, which agrees well with the relevant experimental results.
原文出处://WOS:000283406400083
公开日期2012-04-13
源URL[http://ir.imr.ac.cn/handle/321006/31429]  
专题金属研究所_中国科学院金属研究所
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Y. F. Shao,S. Q. Wang. Quasicontinuum simulation of crack propagation in nanocrystalline Ni[J]. Acta Physica Sinica,2010,59(10):7258-7265.
APA Y. F. Shao,&S. Q. Wang.(2010).Quasicontinuum simulation of crack propagation in nanocrystalline Ni.Acta Physica Sinica,59(10),7258-7265.
MLA Y. F. Shao,et al."Quasicontinuum simulation of crack propagation in nanocrystalline Ni".Acta Physica Sinica 59.10(2010):7258-7265.

入库方式: OAI收割

来源:金属研究所

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