Shear Banding in a Contact Problem between Metallic Glasses

The case of a frictionless contact between spherical body and flat metallic glass is studied using mesoscopic description plasticity combined with semi-analytical the elastic deformation in geometry (code ISAAC). Plasticity described by irreversible strain rearrangements maximum deviatoric direction, above some random threshold. In absence adhesion or friction, plastic initiated below surface. To represent singularities due to adhesion, initial are forced at boundary contact. Then, structural disorder introduced two different levels: either local thresholds for residual strains. It shown that spatial organization not universal, but it very dependent on choice external loading conditions. Spatial curved shear bands may appear only specific set parameters, especially those characterizing compared externally induced gradients.