The soft discrete element method
Résumé
In order to accelerate simulations of assemblies of highly deformable grains, a novel numerical approach, called Soft Discrete Element Method (SDEM) is presented. It consists in extending the classical DEM by introducing the deformability of the grains in a simplified way. Simple kinematics are postulated in order to represent the ovalisation of the grains and their local deformations around interparticle contacts. Adequate equations of motion are derived, and a contact model is proposed in the framework of elastic frictionless grains. Comparisons are made with existing analytical and numerical solutions, and the ability of this method to simulate the compressibility and some micromechanical aspects of this class of materials is validated. Upon implementation in optimized DEM codes, the SDEM is expected to allow large scale simulations of samples of deformable particles.
Domaines
Sciences de l'ingénieur [physics]
Origine : Fichiers produits par l'(les) auteur(s)
