Simulation of material tests using meshfree Lagrangian particle methods

Abstract

This contribution presents an enhanced discrete-element model with special focus on modelling of cohesive ductile materials. The model is based on a basic three-dimensional discrete-element model consisting of spherical rigid particles, which is used to model non-cohesive granular material. This basic model is enhanced by including special interactions. These interactions allow for the description of cohesive ductile behaviour of the modelled material. It is shown that by including these interactions in the discrete-element model, the failure modes of highly ductile materials like aluminium can be qualitatively as well as quantitatively described. The validity of the model is shown by the comparison of different simulated material tests with the experimental counterpart.