Techno Press
Techno Press

Interaction and Multiscale Mechanics   Volume 5, Number 2, June 2012, pages 157-168
The dilatancy and numerical simulation of failure behavior of granular materials based on Cosserat model
Xihua Chu, Cun Yu and Yuanjie Xu

Abstract     [Full Text]
    The dilatancy of granular materials has significant influence on its mechanical behaviors. The dilation angle is taken as a constant in conventional associated or non-associated flow rules based on Drucker-Prager yields theory. However, various experimental results show the dilatancy changes during progressive failure of granular materials. A non-associated flow rule with evolution of dilation angle is adopted in this study, and Cosserat continuum theory is used to describe the behaviors of granular materials for considering to some extent the its internal structure. Numerical examples focus on the bearing capacity and localization of granular materials, and results illustrate the capability and performance of the presented model in modeling the effect on failure behavior of granular materials.
Key Words
    granular materials; Cosserat continuum model; dilation angle; bearing capacity; strain localization.
Xihua Chu, Cun Yu and Yuanjie Xu: Department of engineering mechanics, Wuhan University, Wuhan 430072, P.R. China

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