From bifurcation to failure in a granular material: a DEM analysis |
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| Authors: | L Sibille F-V Donzé F Nicot B Chareyre F Darve |
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| Institution: | (1) Laboratoire Sols, Solides, Structures, INPG, UJF, CNRS, BP 53, 38041 Grenoble Cedex 9, France;(2) Cemagref de Grenoble, Unité ETNA, BP 76, 38402 Saint-Martin-d’Hères Cedex, France |
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| Abstract: | The question of diffuse failure in granular media such as soils is treated by numerical modelling with a discrete element
model. Two numerical samples are considered, one dense and the other loose. A criterion based on the sign of the second-order
work is applied to the numerical model to detect bifurcation points related to diffuse failure. The notions of loss of controllability
and loss of sustainability are taken into account to simulate diffuse failure at bifurcation points detected. Therefore, the
failures predicted based on the second-order work criterion are numerically verified. |
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| Keywords: | Bifurcation Diffuse failure Discrete element method Loss of controllability Loss of sustainability Second-order work |
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