Evolution of Shear Localization in an Elasto-Plastic Cosserat Material under Shearing

Abstract:

Numerical investigations of shear localization evolution within a layer of granular material under large monotonic shearing are presented. Here, micro-polar (Cosserat) continuum approach is applied within the framework of elasto-plasticity to remove the numerical difficulties of localization modeling encountered in classical continuum. The micro-polar kinematical boundary conditions are used to model the rotation resistance of soil grains along the interface between granular layer and surface of adjoining structure. The finite element results show that shear localization takes place from the beginning of shearing and appears parallel to the direction of shearing, close to the boundary with less restriction of particle rotation. Furthermore, the state variables tend towards asymptotical stationary condition in large shear deformations.

• Periodical: Key Engineering Materials (Volumes 577-578)
• Pages: 21-24
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.577-578.21
• Online since: September 2013
• Authors: Babak Ebrahimian
• Keywords: Cosserat (Micro-Polar) Continuum, Finite Element Method (FEM), Shear Strain Localization

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