DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 1523 - 1528
Section Numerical Simulations
Published online 15 September 2009
DYMAT 2009 (2009) 1523-1528
DOI: 10.1051/dymat/2009215

Modeling of the fragmentation by Discrete Element Method

C. Mariotti1, V. Michaut1 and J.F. Molinari2

1  CEA, DAM, DIF, 91297 Arpajon, France
2  LSMS, ENAC, École Polytechnique Fédérale of Lausanne (EPFL), 1015 Lausanne, Switzerland

Published online: 15 September 2009

The aim of this presentation is to validate the Discrete Element Method (DEM) approach to treat dynamic fragmentation problems. The method, which meshes a domain with discrete particles that can possibly debond and contact, is ideally suited to model structures under severe damage. The validation test consists of a simple one dimensional ceramic beam model, which is subjected to intense tensile loading, up to fragmentation. The paper studies the fracture energy dissipated (or number of fragments) during fragmentation as function of number of particles. The obtained results are systematically compared to results obtained through a continuum approach. We show that the fracture energy dissipated in the DEM converges to a well-defined value which is function of the imposed strain rate and material properties, in close accordance to continuum approaches.

© EDP Sciences 2009