On micromechanical damage modeling in geomechanics: Influence of numerical integration scheme

摘要: Tunnel excavations in deep rocks provide stress perturbations which initiate diffuse and/or localized damage propagation the material. This phenomenon can lead to significant irreversible deformations and changes rock properties. In this paper, we propose model such behavior by considering a micromechanically-based approach. The resulting micromechanical model, also accounts for initial stress, is described assessed through numerical analysis of synthetic tunnel drilling Opalinus Clay. A particular emphasis put on integration model. particular, an appropriate choice latter required ensure stability confident prediction excavation damaged zone around tunnels.