Modeling of the Behavior of Granular Bodies using DEM with Contact Moments

Abstract

Numerical simulations of the behavior of granular bodies were carried out using a discrete element method. Two boundary value problems were analyzed: triaxial test and a passive translation of a rigid very rough retaining wall. To simulate the behavior of real grains, spheres of a different diameter with contact moments were taken into account..

Structural analysis and parametric study ballasted track in sandy regions

“…9. At the same time, in the modeling process, the sand particle size is enlarged by 5 times, and the average particle size is increased to 1.8 mm [10,33], which increases the self weight of a single sand particle. And the number of sand particles is reducedin the model according to the principle of mass conservation, so as to improve the efficiency and calculation speed of model balance.…”

“…μ a and μ b are the friction coefficients of material a and b, respectively. The contact parameters between the sleeper, sand particles, and ballast particles used in the model are adopted from references [2,4,33,[38][39][40], as shown in Table 1.…”