DEM simulation of granular media—structure interface: effects of surface roughness and particle shape

Abstract

SUMMARYAn enhanced discrete element method for the numerical modelling of particulate media is presented. This method models a particle of general shape by combining several smaller particles of simpler shape, such as a circle, into clusters that act as a single larger particle. The clusters more accurately model the geometrydependent behaviour of the particles, such as particle interlock and resistance to rolling. The method is implemented within the framework of an existing DEM program without the introduction of new contact or force algorithms. An extensive set of numerical &experiments' is performed which demonstrate the method's e!ectiveness. The granular media}structure interface shear test simulations are performed using both clustered and non-clustered particles. The results indicate that the clustered particles undergo less rolling and provide for increased shear resistance of the medium.

Particle Shape and Crushing Effects on Direct Shear Behavior Using DEM

“…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. More interlocking occurred with a rougher particle shape; as a result, high shear strength was proved.…”

Effect of Temperature on Triaxial Behavior of a Sand with Disaccharide

“…This takes place mainly in the direction against the applied load. Jensen et al [22] modeled soil by discrete element model and showed that in two dimensions, each particle brings three degrees of freedom to the model. In that study, each interparticle contact was modeled with a normaldirection spring and dashpot, and a spring-dashpot-slider assembly in the tangential direction.…”

“…In that study, each interparticle contact was modeled with a normaldirection spring and dashpot, and a spring-dashpot-slider assembly in the tangential direction. From the investigation by Jensen et al [22], it seems to be possible that the stress chain in Leighton Buzzard Sand with sucrose may be stronger than that in the Leighton Buzzard Sand with de-aired water in all the aspects in two dimensions.…”

Energy calculation model of an outgoing conveyor with application of a transfer chute with the damping plate

“…This approach provides valuable information about the flow of dust, and the results are confirmed by experimental observations. Jensen et al (1999) presented an enhanced DEM for the numerical modelling of particulate media. This method models a particle of general shape by combining several smaller particles of simpler shape, such as a circle, into clusters that act as a single larger particle.…”