Keywords Multiphase porous medium;Strain localization;Material instability;Anisotropy;Manifold element method;Chemo-plasticity;Dynamic nonlinear analysis;Implicit integration algorithm;

• 多相多孔介质;应变局部化;材料失稳;各向异性;流形元法;化学塑性;动力非线性分析;隐式积分算法;