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论文类型：会议论文

发表时间：2015-11-09

收录刊物：EI

页面范围：703-708

摘要：The finite element analysis, in which an elastoplastic Cosserat continuum model for the soil is incorporated, is implemented to simulate the strain localization phenomena due to strain softening or non-associated plasticity of the material. Based on the finite element procedure developed for proposed pressure-dependent elastoplastic Cosserat continuum model, progressive failure phenomena which occurring in the shear layer and the full scale test of filling embankment on soft foundation characterized by strain localization due to material softening and the material dilatancy, i.e. non-associated plasticity, are numerically simulated respectively. Numerical results indicate that the classical continuum finite element may suffer from pathological mesh dependence and be incapable of completing the analysis of the whole failure process, while Cosserat continuum finite elements possess better performance in preserving the well-posedness of the localization problems and in completing the simulation of the entire progressive failure process occurring in geotechnical engineering structures.