Crack dynamics and crack surfaces in elastic beam lattices

被引：4

作者：

Astrom, J

Alava, M

Timonen, J

机构：

[1] Univ Jyvaskyla, Dept Phys, FIN-40351 Jyvaskyla, Finland

[2] NORDITA, DK-2100 Copenhagen, Denmark

[3] Helsinki Univ Technol, Phys Lab, FIN-02015 Hut, Finland

来源：

PHYSICAL REVIEW E | 1998年 / 57卷 / 02期

基金：

美国国家卫生研究院;

关键词：

D O I：

10.1103/PhysRevE.57.R1259

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The dynamics of propagating cracks is analyzed in elastic two-dimensional lattices of beams. At early times, inertia effects and static stress enhancement combine so that the crack-tip velocity is found to behave as t(1/7). At late times a minimal crack-tip model reproduces the numerical simulation results. With no disorder and for fast loading, a "mirror-mist-mirror" crack-surface pattern emerges. Introduction of disorder leads, however, to the formation of the "mirror-mist-hackle"-type interface typical in many experimental situations. [S1063-651X(98)50902-6].

引用

页码：R1259 / R1262

页数：4

共 24 条

[1] INSTABILITY DYNAMICS OF FRACTURE - A COMPUTER-SIMULATION INVESTIGATION [J].