Noncoaxiality between Fabric and Stress in Two-Dimensional Granular Materials

This paper investigates the evolution of the fabric for different contact networks (i.e., the strong, weak, and overall contact networks) in granular material. Two-dimensional tests along proportional strain paths and simple shear tests are conducted using the discrete element method (DEM). Results show that the coaxiality between the principal directions of the fabric tensor for the overall contact network and that of the stress tensor depends …