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.

引用

页数：4

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