Where does a cohesive granular heap break?

Details Where does a cohesive granular heap break? Where does a cohesive granular heap break?

2003-02-24

arxiv.org/abs/cond-mat/0302479v2

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 6 figures. Submitted to Phys. Rev. E

Scientific paper

In this paper, we consider the effect of cohesion on the stability of a granular heap. We first briefly review literature results on the cohesion force between two rough granular beads and specifically consider the dependence of the adhesion force on the normal load. We then compute the dependence of the maximum angle of stability of the heap as a function of the cohesion. We point out that the dependence of the cohesive forces on the external normal load between grains is a key point in determining the localization of the failure plane. While for a constant cohesive force, slip occurs deep inside the heap, surface failure is obtained for a linear dependence of the cohesion on the normal stress.

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