Anisotropic Material Behavior in Dense, Cohesive‐Frictional Powders

The cohesion and anisotropy in dense, cohesive powders was studied by using a discrete element method for the simulation of a biaxial box deformation. The approach includes normal (repulsive/cohesive) as well as tangential forces. Reorganization of the contact network first leads to anisotropy and later to shear band formation and softening behavior from the macroscopic point of view. As an important result of this work it was found that the macroscopic cohesion of the material can be related to the maximal microscopic attractive adhesion force.