Edge dislocation emission from nanovoid with the effect of neighboring nanovoids and surface stress

摘要：

　　Experimental evidence,molecular dynamics simulations and theoretical analyses of nanovoid growth and coalescence in ductile materials indicate that nanovoid growth,coalescence,and stain localization depend strongly on distribution and volume fraction of the nanovoids in ductile porous materials.In the light of this mechanism,a generalized self-consistent theoretical model to describe the dislocation emitted from nanovoid accounting for the effect of neighboring nanovoids is suggested.The explicit solution to the critical stress is derived by means of the complex variable method.The influence of the nanovoid size,the surface effect,nanovoid content and uniform distribution density of neighboring nanovoids in the effective medium on the critical condition required for dislocation emission from nanovoid surface is discussed.

关键词： dislocation emission neighboring nanovoid interactions nanovoid volume fractions surface stress

作者: Yingxin Zhao Qihong Fang Youwen Liu Chunzhi Jiang

作者单位: College of Mechanical and Vehicle Engineering,Hunan University,Changsha,410082 Hunan Province,PR Chi College of Mechanical and Vehicle Engineering,Hunan University,Changsha,410082 Hunan Province,PR Chi College of Mechanical and Vehicle Engineering,Hunan University,Changsha,410082 Hunan Province,PR Chi

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-9

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）