Influence of density, pressure and mean grain diameter on shear band localization in granular materials
The focus of the present paper is to investigate the influence of density, pressure and mean grain diameter on shear banding in dry granular materials based on a hypoplastic constitutive model. With a unified description of the interaction between pressure level and density the hypoplastic model can be applied to a wider range of pressures and densities. A bifurcation analysis is carried out to study the onset of strain localization and the shear band orientation under plane-strain compression. The post-bifurcation behavior, i.e. the shear band evolution, shear band thickness and distribution of density, is investigated with finite element calculations using a polar hypoplastic model.