https://doi.org/10.1051/epjconf/202124907011
High compressibility caused by particle breakage: a DEM investigation
1
Univ. Grenoble Alpes, CNRS, Grenoble INP, 3SR, 38000 Grenoble, France.
2
Andra, R&D Division, Meuse/Haute-Marne Underground Research Laboratory, 55290 Bure, France.
* e-mail: vincent.richefeu@3sr-grenoble.fr
** e-mail: gael.combe@3sr-grenoble.fr
Published online: 7 June 2021
This paper summarises the numerical and experimental studies of brittle, hollow, cylindrical particles, called shells. It addresses the influence of shell properties both at the particle and assembly scales. Extreme compressibility has been recorded in the oedometer tests. Due to the large internal porosity of the shell, the breakage phenomena lead to highly compressive deformations with a significant stress dissipation. Using the Discrete Element Method (DEM), we have investigated in depth the micro-mechanical phenomena governing this macroscopic response. By quantifying the breakage and separating the double-porosity of the material, the foundations of a future constitutive model have been established throughout a simple prediction model applicable to the engineering practice.
A video is available at https://doi.org/10.48448/az20-zt49
© 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.
