https://doi.org/10.1051/epjconf/202124908013
A one parameter damageable contact law for DEM, with application to frictional-cohesive granular materials
Université Grenoble Alpes – CNRS – Grenoble INP, 3SR, Grenoble, France
* e-mail: cyrille.couture@3sr-grenoble.fr
** e-mail: vincent.richefeu@3sr-grenoble.fr
*** e-mail: jacques.desrues@3sr-grenoble.fr
**** e-mail: pierre.besuelle@3sr-grenoble.fr
Published online: 7 June 2021
A novel type of damageable cohesive law is presented for paired particle interactions in a DEM granular arrangement. It is designed in the spirit of a mixed breakage criterion for solid cohesion interaction, which can be implemented in parallel to a granular-frictional contact law. The evolution of damage at the contact level can be be easily modulated to enable a progressive transition from an initially linear elastic response to a loss of cohesion, by using a single parameter χ*. In a straightforward numerical implementation, the effect of this contact model is presented for a 3D periodic boundary condition DEM code. The results from a series of simulations show that, for a constant peak resistance of the cohesion, a more progressive damage result in an increase of the peak stress in a particle assembly, as well as a continuous transition in the stiffness of the stress-strain response around the peak stress.
A video is available at https://doi.org/10.48448/z2t8-n571
© The Authors, published by EDP Sciences, 2021
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.
