Abstract
This article presents a numerical framework dedicated to the simulation of granular materials with highly deformable grains. This framework is based on a multibody meshfree strategy, which makes it possible to account for the constitutive model of the material composing each grain and for possibly complex contact laws (e.g. adhesion, friction, etc.). The main principles of the approach are first presented, and two illustrative cases are then detailed in order to emphasize its potential in several domains of the granular science.
Highlights
Discrete-Element modelling (DEM) has become a widely-used numerical method for fine and predictive modelling of granular materials in several industrial and scientific fields
Situation (a) corresponds to the initial state of the system, (b) corresponds to the first stages of the loading, (c) to the installation of a flow regime in the third body, and (d) to the final stage. Both stress and velocity fields are provided. These results show that, in the first stages of the loading, the stress field looks similar to the force network which is usually observed in hard granular materials
A novel numerical framework dedicated to highly deformable granular materials was presented in this article
Summary
Discrete-Element modelling (DEM) has become a widely-used numerical method for fine and predictive modelling of granular materials in several industrial and scientific fields (e.g. geomechanics, food industry, chemistry, etc.). In this framework, each grain is considered as a rigid body which follows the laws of motion and interacts with other bodies by the means of contacts. The assumption of rigid bodies enters into contradiction with the observed physical behaviours This is the case when the material composing the grains is relatively soft (e.g. ductile powders), or when this material is submitted to very high loadings (e.g. tribology).
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