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 | |
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 |
推荐引用方式 GB/T 7714 | 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
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。