Softening induced instability of a stretched cohesive granular layer.
Phys Rev Lett
; 105(20): 208001, 2010 Nov 12.
Article
em En
| MEDLINE
| ID: mdl-21231266
ABSTRACT
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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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article