Softening induced instability of a stretched cohesive granular layer

Details Softening induced instability of a stretched cohesive granular layer Softening induced instability of a stretched cohesive granular layer

2010-10-23

arxiv.org/abs/1010.4890v1

Physics

Classical Physics

Scientific paper

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.

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