Numerical simulation of the compaction of crushable grains in 3D
1 Laboratoire de Mécanique et Génie Civil (LMGC), Université de Montpellier, CNRS, Montpellier, France
2 CEA, DEN, DEC, SFER, LCU, 13108, Saint Paul lez Durance, France
3 Multi-Scale Materials Science for Energy and Environment <MSE> 2, UMI 3466 CNRS-MIT Energy Initiative, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambrid 02139, USA
* e-mail: email@example.com
Published online: 30 June 2017
Grain fragmentation is simulated by means of a three-dimensional discrete element approach called bonded-cell method (BCM). In this method, grains and potential fragments may have any polyhedral shape and size, capturing the geometrical complexity of brittle grain failure. As an application of this method, we present the uniaxial compaction of samples composed of several grains and we analyse the load-density relations, the grain size evolution, and the failure mechanism within the grains. This numerical approach permitted us to analyse the effect of the grains internal strength on the macroscopic compaction behaviour and to study the evolution of the grain size distribution towards a power-law distribution as several experiments have shown in literature. Finally, we present a brief micro-mechanical analysis on the failure modes within the grains, letting us know the kind of stresses that prompts grain fragmentation.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.