Triaxial tests and DEM simulation on artificial bonded granular materials

Mechanical Simulation of Granular Materials by DEM Analysis

A study of four constitutive contact models employed in discrete element analysis is presented. Most discrete element simulations employ simple contact models due to computational time constraints. However, few works are available in literature which evaluates the suitability of these simple models to simulate DEM applications. The influence of more complex models on bulk behavior is examined t...

Incremental response of granular materials: DEM results

We systematically investigate the incremental response of various equilibrium states of dense 2D model granular materials, along the biaxial compression path (σ11 < σ22, σ12 = 0). Stress increments are applied in arbitrary directions in 3dimensional stress space (σ11,σ22,σ12). In states with stable contact networks we compute the stiffness matrix and the elastic moduli, and separate elastic and...

Exploring the micro - mechanics of triaxial instability in granular materials

14 The instability of granular materials due to water infiltration under fully drained conditions has been 15 previously considered in experimental studies. While laboratory experiments can provide macro-scale 16 insight into drained instability, the micro-mechanics under such conditions are yet to be explored. 17 This study has employed the Discrete Element Method (DEM) to simulate constant sh...

DEM-CFD modeling and simulation of granular systems

Size reduction process is widely used in the chemical and pharmaceutical industries. Jetmill is one of the most commonly used tool for such processes due to advantages they over other mills such as low contamination and narrow product size distribution. However the efficiency of the jet milling process is very low, furthermore the jet-milling process is sensitive to many parameters such as feed...

Evaluation of undrained response from drained triaxial shear tests: DEM simulations and Experiments