Nonlinear elasto-plastic model for dense granular flow

Details Nonlinear elasto-plastic model for dense granular flow Nonlinear elasto-plastic model for dense granular flow

2009-03-25

arxiv.org/abs/0903.4480v3

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

This work proposes a model for granular deformation that predicts the stress and velocity profiles in well-developed dense granular flows. Recent models for granular elasticity (Jiang and Liu 2003) and rate-sensitive plastic flow (Jop et al. 2006) are reformulated and combined into one universal granular continuum law, capable of predicting flowing regions and stagnant zones simultaneously in any arbitrary 3D flow geometry. The unification is performed by justifying and implementing a Kroner-Lee elasto-plastic decomposition, with care taken to ensure certain continuum physical principles are necessarily upheld. The model is then numerically implemented in multiple geometries and results are compared to experiments and discrete simulations.

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