摘要
报道近年来分子动力学方法应用于研究位错、裂纹、晶界及其相互作用方面的进展．主要包括：裂纹尖端的位错发射，位错发射的不稳定堆垛能，晶体与裂纹’几何关系对位错发射的影响，温度对位错发射的影响以及由裂纹尖端发射的位错列与不对称倾侧晶界的相互作用．报道主要以我们的工作为主。
This paper gives a brief overview of the advances in the research of crack, dislocation, grain boundary and their interactions by molecular dynamics method. The contents include:dislocation nucleation and emission from crack tip; the unstable stacking criterion for the dislocation emission from crack tip; the effect of crack and crystal geometry on the dislocation emission; tem-perature dependent dislocation nucleation and emission processes; and the in-teraction of an array of dislocations emitted from crack tip with asymmetrical tilt grain boundary. The discussions are mainly based on our research results.
出处
《力学进展》
EI
CSCD
北大核心
1996年第1期14-27,共14页
Advances in Mechanics
基金
国家重大自然科学基金
关键词
裂纹
位错
分子动力学
晶界
断裂
材料力学
crack
dislocation
dislocation emission
grain boundary
fracture.
