Self-organization and annealed disorder in a fracturing process

被引:62
作者
Caldarelli, G
DiTolla, FD
Petri, A
机构
[1] TECH UNIV DENMARK,CTR ATOM SCALE MAT PHYS,DK-2800 LYNGBY,DENMARK
[2] CNR,IST ACUST OM CORBINO,I-00189 ROME,ITALY
[3] IST NAZL FIS NUCL,I-06100 PERUGIA,ITALY
关键词
D O I
10.1103/PhysRevLett.77.2503
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that a vectorial model for inhomogeneous elastic media self-organizes under external stress. An onset of crack avalanches of every duration and length scale compatible with the lattice size is observed. The behavior is driven by the introduction of annealed disorder, i.e., by lowering the breaking threshold in the neighborhood of a bond broken by the stress, with a process similar to self-organized criticality. A further comparison with experimental results of acoustic emission (AE), shows that the stability of the elastic potential energy of the system in the AE regime is a sufficient condition for reproducing the algebraic distribution of the energy released during cracks formation.
引用
收藏
页码:2503 / 2506
页数:4
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