Abstract
Based on the bridge scale methods initially developed by Wagner and Liu[1–2] a bridging scale method (BSM), which couples discrete particle model using the discrete element method (DEM) and Cosserat continuum model using the finite element method (FEM) in the fine and coarse scales respectively is proposed to study the mechanical behaviors in granular materials in the present work. A proper presentation of the interfacial condition between the whole domain and the local region where the medium is also modeled with discrete particle assembly, is required and indeed presented and discussed. The numerical results are given to demonstrate the performance and applicability of the proposed method.
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