LOCAL CRACK BRANCHING AS A MECHANISM FOR INSTABILITY IN DYNAMIC FRACTURE

被引：261
作者：
SHARON, E [1 ]
GROSS, SP [1 ]
FINEBERG, J [1 ]
机构：
[1] UNIV TEXAS,CTR NONLINEAR DYNAM,AUSTIN,TX 78712
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.74.5096
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The motion of a crack in dynamic fracture has been shown to be governed by a dynamical instability causing oscillations in its velocity and structure on the fracture surface. We present experimental evidence indicating that the mechanism for instability is attempted local crack branching. At the instability onset, a crack will locally change its topology and sprout small, microscopic side branches. The trajectories of these local branches are independent of the crack velocity and exhibit scaling behavior. A connection between microscopic and macroscopic crack branching is established. © 1995 The American Physical Society.
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页码：5096 / 5099
页数：4
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