Softening Induced Instability of a Stretched Cohesive Granular Layer

被引：13
|
作者：
Alarcon, Hector [1 ]
Ramos, Osvanny [2 ]
Vanel, Loic [3 ]
Vittoz, Franck [2 ]
Melo, Francisco [1 ]
Geminard, Jean-Christophe [2 ]
机构：
[1] Univ Santiago Chile, Dept Fis, Santiago, Chile
[2] Univ Lyon, Phys Lab, Ecole Normale Super Lyon, CNRS,UMR 5672, F-69007 Lyon, France
[3] Univ Lyon 1, CNRS, Lab Phys Mat Condensee & Nanostruct, UMR 5586, F-69622 Villeurbanne, France
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 20期
关键词：
STABILITY; PILE;
D O I：
10.1103/PhysRevLett.105.208001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on a cellular pattern which spontaneously forms at the surface of a thin layer of a cohesive granular material submitted to in-plane stretching. We present a simple model in which the mechanism responsible of the instability is the "strain softening" exhibited by humid granular materials above a typical strain. Our analysis indicates that such a type of instability should be observed in any system presenting a negative stress sensitivity to strain perturbations.
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收藏
页数：4
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