Failure in granular materials based on acoustic tensor: a numerical analysis

We investigate localization in granular material with the support of numerical simulations based upon DEM (Distinct Element Method). Localization is associated a discontinuity component incremental strain over plane surface through condition determinant acoustic tensor to be zero. are carried out on an aggregate elastic frictional spheres, initially isotropically compressed and then sheared at constant pressure p 0 . The components stiffness evaluated numerically stressed states along triaxial test employed evaluate order predict localization. This occurs pre-peak region, where hardens under circumstance incrementally frictionless: it regime which tangential force does not change as deformation proceedes and, consequently, deviatoric stress varies only normal contact force.