Supersonic dislocation kinetics from an augmented Peierls model

被引：56
|
作者：
Rosakis, P [1 ]
机构：
[1] Cornell Univ, Dept Theoret & Appl Mech, Ithaca, NY 14853 USA
来源：
PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.86.95
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The controversial issue of whether dislocations can travel faster than shear or longitudinal waves is investigated. The Peierls model, modified to account for drag and gradient effects, furnishes a kinetic relation between the applied shear stress and speed of uniformly moving dislocations. This relation predicts intersonic and supersonic speeds at high enough stress, but also regimes of unstable motion, in agreement with recent atomistic simulations.
引用
收藏
页码：95 / 98
页数：4
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