CRACK DYNAMICS AND CRACK SURFACES IN ELASTIC BEAM LATTICES

Authors
ASTROM J ALAVA M TIMONEN J
Citation
J. Astrom et al., CRACK DYNAMICS AND CRACK SURFACES IN ELASTIC BEAM LATTICES, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 57(2), 1998, pp. 1259-1262
Citations number
24
Categorie Soggetti
Physycs, Mathematical","Phsycs, Fluid & Plasmas
Journal title
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics → ACNP
ISSN journal
1063651X
Volume
57
Issue
2
Year of publication
1998
Part
A
Pages
1259 - 1262
Database
ISI
SICI code
1063-651X(1998)57:2<1259:CDACSI>2.0.ZU;2-1
Abstract
The dynamics of propagating cracks is analyzed in elastic two-dimensio nal lattices of beams. At early times, inertia effects and static stre ss enhancement combine so that the crack-tip velocity is found to beha ve as t(1/7). At late times a minimal crack-tip model reproduces the n umerical 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].