Abstract：A state-dependent sand model is implemented in a fully-coupling finite element program to investigate the strain localization problems in sand under drained plane strain condition. Due to its state-dependent feature，the coupling influence of effective mean normal stress and density of soil sample on the strain localization is studied in details. The numerical predictions show that the orientation of shear band is strongly related to effective mean normal stress and material density. The lower the effective mean normal stress is，the less the void ratio of soil samples is and the larger the inclination angle of shear band is.
