Characteristic lengths in Cosserat continuum modeling of granular materials

摘要

Purpose - Cosserat continuum models are motivated by modeling size effects in materials with microstructure. While elastic Cosserat continuum models can reproduce size effects in deformation stiffness, inelastic models are often used to capture localization and post failure behavior of materials. In application of inelastic Cosserat models, parameter determination is a difficult issue not fully addressed. The purpose of this paper is to discuss parameter-related characteristic lengths in Cosserat continuum modeling of granular materials.