Dynamics of brittle fracture with variable elasticity

被引:70
作者
Abraham, FF
机构
[1] IBM Research Division, Almaden Research Center, San Jose, CA, 95120-6099
关键词
D O I
10.1103/PhysRevLett.77.869
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Simulations show that brittle cracks approach six-tenths the Rayleigh speed and follow the highest surface energy path. Using an interatomic potential recently developed by J.P. Sethna, we find that the crack's limiting speed now approaches the theoretical prediction of the Rayleigh speed, but the crack path is-still associated with greatest elastic stiffness and surface energy. We conclude that the crack's dynamics is governed by the anisotropic mean-field elasticity associated with large strains (greater than or equal to 7%).
引用
收藏
页码:869 / 872
页数:4
相关论文
共 9 条
[1]   INSTABILITY DYNAMICS OF FRACTURE - A COMPUTER-SIMULATION INVESTIGATION [J].
ABRAHAM, FF ;
BRODBECK, D ;
RAFEY, RA ;
RUDGE, WE .
PHYSICAL REVIEW LETTERS, 1994, 73 (02) :272-275
[2]  
ABRAHAM FF, 1996, COMPUTER SIMULATION
[3]   INSTABILITY IN DYNAMIC FRACTURE [J].
FINEBERG, J ;
GROSS, SP ;
MARDER, M ;
SWINNEY, HL .
PHYSICAL REVIEW LETTERS, 1991, 67 (04) :457-460
[4]   INSTABILITY IN THE PROPAGATION OF FAST CRACKS [J].
FINEBERG, J ;
GROSS, SP ;
MARDER, M ;
SWINNEY, HL .
PHYSICAL REVIEW B, 1992, 45 (10) :5146-5154
[5]   SLIGHTLY CURVED OR KINKED CRACKS IN ANISOTROPIC ELASTIC SOLIDS [J].
GAO, HJ ;
CHIU, CH .
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 1992, 29 (08) :947-972
[6]   ACOUSTIC EMISSIONS FROM RAPIDLY MOVING CRACKS [J].
GROSS, SP ;
FINEBERG, J ;
MARDER, M ;
MCCORMICK, WD ;
SWINNEY, HL .
PHYSICAL REVIEW LETTERS, 1993, 71 (19) :3162-3165
[7]   DYNAMICS AND MORPHOLOGY OF BRITTLE CRACKS - A MOLECULAR-DYNAMICS STUDY OF SILICON-NITRIDE [J].
NAKANO, A ;
KALIA, RK ;
VASHISHTA, P .
PHYSICAL REVIEW LETTERS, 1995, 75 (17) :3138-3141
[8]  
Sethna J. P., COMMUNICATION
[9]   MOLECULAR-DYNAMICS SIMULATIONS OF 2-DIMENSIONAL MATERIALS AT HIGH-STRAIN RATES [J].
WAGNER, NJ ;
HOLIAN, BL ;
VOTER, AF .
PHYSICAL REVIEW A, 1992, 45 (12) :8457-8470