Effect of Particle Shape on Parameter Calibration for a Discrete Element Model for Mining Applications

Moncada, Manuel; Concha, F.; Rodríguez, Cristian; Toledo, Patricio

doi:10.3390/min13010040

Cited by 11 publications

(3 citation statements)

References 34 publications

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“…In the specimen preparation phase, the dimensions of the box were defined, and spheres were randomly distributed inside the box using The mechanical behavior of granular materials is significantly influenced by the shape of their particles. However, using non-spherical particles in simulations can be computationally intensive and require significant storage capacity [36,37]. Nevertheless, recent research has demonstrated that using sphere particles with appropriate rolling friction can lead to similar effects as non-spherical particles while reducing both storage requirements and computational time [21,37,38].…”

Section: Model Setupmentioning

confidence: 99%

“…Several researchers have conducted calibration chamber and centrifuge tests on carbonate sands to better understand what happens when a pile is driven into weak sands [ 5 , 6 , 7 , 8 ]. This phenomenon has also attracted many researchers to conduct laboratory tests to study the influence of particle breakage on the critical state behaviors, shear stress ratios and dilatancy of granular soils [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ] as well as numerical modeling [ 14 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, studies of direct shear tests at the microscopic level have become more popular using the Discrete Element Method among others by [ 14 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ]. Seyyedan et al [ 29 ] employed a novel approach that combined the Discrete Element Method (DEM) and Extended Finite Element Method (XFEM) to conduct numerical simulations of direct shear tests.…”

Section: Introductionmentioning

confidence: 99%

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3D DEM Analysis of Particle Breakage Effect on Direct Shear Tests of Coarse Sand

2023

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This paper explores the effect of particle breakage on the mechanical behavior of coarse sand through 3D Discrete Element Method (DEM) simulations of direct shear tests (DST). The objective is to gain insights into the macro- and micro-mechanical behaviors of crushable coarse sand, with a particular focus on the stress–strain relationship, volumetric deformation, and evolution of grain crushing. The simulations involve a comparison between non-crushable and crushable particle models, where the crushable particles are implemented in the shear zone of the DST subjected to different high normal stresses. The findings indicate that the crushable particles experience partial crushing at peak shear stress, with further particle crushing leading to the production of finer particles at the shearing plane during shearing at the critical state. The migration of these finer particles under pressure and gravity generates their accumulation predominantly in the lower section of the simulation box. Importantly, the presence of crushing in the DST induces a decrease in the shear stress and an increase in the volumetric strain leading to contractive behavior instead of dilation, which gradually stabilizes the volumetric deformation at higher normal stresses.

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