Softening induced instability of a stretched cohesive granular layer

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...

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Bibliographic Details
Published in:arXiv.org 2010-10
Main Authors: Alarcon, Hector, Ramos, Osvanny, Vanel, Loïc, Vittoz, Franck, Melo, Francisco, Jean-Christophe Géminard
Format: Article
Language:English
Subjects:
Granular materials
Plastic deformation
Softening
Stability
Stability analysis
Strain analysis
Online Access:Get full text
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Summary: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 type of instability should be observed in any system presenting a negative stress sensitivity to strain perturbations.
ISSN:2331-8422
DOI:10.48550/arxiv.1010.4890