Impact Studies with Peridynamics

Abstract

Several impact and fragmentation scenarios were studied using peridynamics, including impact on thin discs, taking into consideration the stiffness of the impactors and its influence on the fragmentation pattern. The promising peridynamics theory allows bypassing the mathematical singularity that a fracture represents within the classical theory of continuum mechanics, conditioned to the
constitutive models available for such a problem. In our tests, the prototype microelastic brittle model was used, and the influence of the constitutive model parameters on discs and spheres fragmentation was studied. Collision and fragmentation of spherical clusters are compared to similar results using atomistic
and granular models.