期刊
EPL
卷 81, 期 3, 页码 -出版社
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
DOI: 10.1209/0295-5075/81/36001
关键词
-
A novel analysis of homogeneous nucleation of dislocations in sheared two-dimensional crystals described by periodized-discrete-elasticity models is presented. When the crystal is sheared beyond a critical strain F = F(c), the strained dislocation-free state becomes unstable via a subcritical pitchfork bifurcation. Selecting a fixed. nal applied strain F(f) > F(c), different simultaneously stable stationary configurations containing two or four edge dislocations may be reached by setting F = F(f)t/t(r) during different time intervals t(r). At a characteristic time after tr, one or two dipoles are nucleated, split, and the resulting two edge dislocations move in opposite directions to the sample boundary. Numerical continuation shows how configurations with different numbers of edge dislocation pairs emerge as bifurcations from the dislocation-free state. Copyright (C) EPLA, 2008.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据