DEM Simulation of Particle Damage in Granular Media — Structure Interfaces

Discrete element method for modelling solid and particulate materials

“…Indeed, it appears that grain crushing is an important result, or initiator, of shear zone formation in sand [9]. Jensen et al [10] used an energy density criterion to determine if enough work has been accumulated by a DEM element of a cluster to warrant its separation (breakage) from the cluster. During the course of computation, the increment of sliding work done on a particular DEM element i is computed at each time step by summing the work increments for all extra-cluster contacts for the element dW i = number of extra-cluster contacts…”

“…The work of Jensen et al [10] presents reasonable criteria for modelling damage due to wear, which is a more or less gradual process that depends on frictional sliding. The work reported in subsequent sections of this paper will allow damage due to grain fracture, which should enhance the ability of DEM to model particulate materials.…”

“…In our DEM approach to modelling solids, we expand on the clustering concept introduced by Jensen et al [6,7,10] to use megaclusters, wherein the entire volume of a solid is modelled by bonding individual DEM elements, or clusters of DEM elements, together. For a solid with no initial cracks (i.e.…”

Particle Shape and Crushing Effects on Direct Shear Behavior Using DEM

“…At the same time, the study on the shear behavior, considering the particle shape and particle crushing of granular soils, has progressed considerably. Many researchers have selected the modeling technique of binding several circular particles with a constant bonding strength to simulate the geometrical shape of particles through numerical analysis using DEM (Jensen et al, 2001;McDowell and Harireche, 2002;Cheng et al, 2003). Jensen et al (1999) conducted a DEM-based numerical analysis to study the in‰uence of particle shape on shear behavior by using clustered particles and non-clustered particles.…”

A fractal model of contact force distribution and the unified coordination distribution for crushable granular materials under confined compression

“…1 illustrate the response to effective crushing during confined uniaxial compression in our study using the DEM. Over the past two decades, DEM has been used to investigate crushable particles through two alternative approaches: replacing the breaking particles with new smaller fragments or using a bonded agglomerate [15,20,[37][38][39][40][41][42][43][44][45][46][47][48][49][50]. Different numerical models with their respective advantages and limitations are considered in terms of time efficiency, physical conservation and computing accuracy.…”