INSTABILITY IN DYNAMIC FRACTURE

被引：345

作者：

FINEBERG, J ^{[1
]}

GROSS, SP ^{[1
]}

MARDER, M ^{[1
]}

SWINNEY, HL ^{[1
]}

机构：

[1] UNIV TEXAS,CTR NONLINEAR DYNAM,AUSTIN,TX 78712

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.67.457

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Cracks in brittle materials have terminal velocities far below theoretical predictions. To address this problem we have investigated the propagation of cracks in a brittle plastic (polymethylmethacrylate). Velocity measurements with resolution an order of magnitude better than past experiments reveal the existence of a critical velocity at which the velocity begins to oscillate, the mean acceleration drops sharply, and a pattern is formed on the fracture surface. Thus the dynamics of cracks may be governed by a dynamical instability.

引用

页码：457 / 460

页数：4

共 31 条

[1] UNIVERSAL SCALING OF THE STRESS-FIELD AT THE VICINITY OF A WEDGE CRACK IN 2 DIMENSIONS AND OSCILLATORY SELF-SIMILAR CORRECTIONS TO SCALING [J].