Micromechanical Model for Deformation in Solids with Universal Predictions for Stress-Strain Curves and Slip Avalanches

被引：281

作者：

Dahmen, Karin A. ^{[1
]}

Ben-Zion, Yehuda

Uhl, Jonathan T.

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 17期

关键词：

HETEROGENEOUS FAULTS; PLASTICITY; SCALE; CRITICALITY; EARTHQUAKES; BEHAVIOR; FLOW;

D O I：

10.1103/PhysRevLett.102.175501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A basic micromechanical model for deformation of solids with only one tuning parameter (weakening epsilon) is introduced. The model can reproduce observed stress-strain curves, acoustic emissions and related power spectra, event statistics, and geometrical properties of slip, with a continuous phase transition from brittle to ductile behavior. Exact universal predictions are extracted using mean field theory and renormalization group tools. The results agree with recent experimental observations and simulations of related models for dislocation dynamics, material damage, and earthquake statistics.

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页数：4

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