HIGH-VELOCITY DISLOCATIONS - EFFECTIVE MASS, EFFECTIVE LINE TENSION AND MULTIPLICATION

被引：14

作者：

SAKAMOTO, M

机构：

[1] Department of Precision Engineering, Osaka University, Suita, Osaka 565

来源：

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1991年 / 63卷 / 06期

关键词：

D O I：

10.1080/01418619108205580

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An expression is derived for the effective mass of an edge dislocation moving with uniform velocity upsilon in an isotropic elastic medium. Ishioka's analysis of the effective line tension of stationary dislocations is extended to the uniformly moving dislocations. The effective line tension of the moving edge dislocation becomes negative for c greater-than-or-equal-to upsilon greater-than-or-similar to 0.81 c, where c is the velocity of transverse sound waves, when Poisson's ratio nu = 0.3. The limiting velocity upsilon-c of the edge dislocation is not c but about 0.81 c. Because the edge dislocation becomes unstable for c greater-than-or-equal-to upsilon greater-than-or-equal-to upsilon-c, multiplication of the dislocation is expected at upsilon-c.

引用

页码：1241 / 1248

页数：8