Page 2 - Discrete Element Method News Today

This study presents a novel approach to rock pre-conditioning to promote the sustainability of low-grade ore mining applications such as in-situ recovery and cave mining. The proposed method involves a two-stage hybrid approach, utilizing soundless cracking demolition agents (SCDAs) to initiate radial fractures in a predrilled host rock, followed by hydraulic stimulation to extend the fractures. SCDA injection in the first stage creates multiple radial fractures around the injection well. Howeve...

This paper investigates the strength and critical state (CS) behaviours of sand under axisymmetric stress paths with different shearing modes using discrete element method (DEM). The stress paths include axial compression (AC) and axial extension (AE), and the shearing modes include conventional triaxial (CT) mode and constant mean pressure (CP) mode. A series of dense and loose sand samples are generated for this purpose with confining pressures ranging from 100 kPa to 900 kPa. The CS is achiev...

[img]https://i.postimg.cc/KYftFsBc/0-CKg-W8-AWo0l0-Rs-A36i3n-Xkd-Sb-Oc-ZXOi0.jpg[/img] [b]ESSS Rocky DEM 23.1.1 (x64) File Size: 914.3 MB [/b] ROCKY is an effective software for modeling granular media by the method of discrete elements (MDE or DEM - Discrete Element Method), allows you to quickl...

This paper presents the discrete element modeling of the dynamic response of a ballasted track under moving loads. The DEM model, consisting of sleepers, ballast, and sub-ballast, has been calibrated using field and laboratory data. This model was further used to examine the dynamic responses of the ballasted track subjected to a series of moving traffic loading representing various train axle loads and speeds. The results show that the permanent settlement of the sleeper, the breakage of ballas...

The present study investigates the critical state behaviour of granular assemblies composed of clumped particles under four different drained axisymmetric triaxial stress paths, using the discrete element method (DEM). A series of numerical samples were prepared at initial states with different density indexes (ID) and different initial confining pressures (po′). These samples were sheared to large strains, at which constant stresses and volumes were maintained to reach the critical state. The...

Water ingress in soils through infiltration can trigger instability leading to failures in slopes and embankments under drained conditions. Subsequent investigations on such failures have shown that the infiltration of water in soils can cause a reduction in effective stress thus triggering the instability. In addition, studies have indicated that the constant shear drained (CSD) triaxial test can depict an unstable phenomenon where effective stress is continuously reduced. In the current study,...

In this paper, the discrete element method (DEM) is coupled with the Lattice Boltzmann method (LBM) to model the cone penetration test (CPT) of a saturated granular media. The coupled numerical model was calibrated using one-dimensional (1D) consolidation theory. The results obtained from the 1D consolidation test simulation showed good agreement with the analytical equation that was proposed by Terzaghi. A series of LBM-DEM simulations were carried out to understand the effect of the penetratio...

[center][img]https://i.postimg.cc/vmf7gVtB/0-CKg-W8-AWo0l0-Rs-A36i3n-Xkd-Sb-Oc-ZXOi0.jpg[/img] [b]ESSS Rocky DEM 22.1.2 (x64) | File Size: 910.9 MB[/b][/center] ROCKY is an effective software for modeling granular media by the method of discrete elements (MDE or DEM - Discrete Element Method), al...

In this paper, a newly developed 3-dimentional discrete element model (DEM) for gravel-rubber mixtures (GRMs), namely DEM4GRM, that is capable of accurately describing the macro-scale shear response (from small to large deformation) of GRMs in a direct shear box apparatus is presented. Rigid gravel grains are modelled as simple multi-shape clumps, while soft rubber particles are modeled by using deformable 35-ball body-centered-cubic clusters. Mixtures are prepared with different volumetric rubb...

[img]https://i.postimg.cc/j2z6q8sy/ESSS-Rocky-DEM-22-1-0-x64.jpg[/img] [b]File size: 800 MB[/b] ROCKY is an effective software for modeling granular media by the method of discrete elements (MDE or DEM - Discrete Element Method), allows you to quickly and as realistic as possible to model ix bulk...