Granular Matter
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Understanding the local flow rate peak of a hopper discharging discs through an obstacle using a Tetris-like model
Granular Matter - - 2019
Shear characteristics of granular materials with different friction coefficients based on ring shear test
Granular Matter - Tập 26 - Trang 1-18 - 2024
Interparticle friction is an intrinsic property of particles, which plays an important role in the macroscopic and microscopic shear mechanical properties of granular materials. In this research, we investigate the shear behavior of granular materials with different friction coefficients using ring shear tests. The particle image velocimetry (PIV) technique was also used to analyze the shear flow ...... hiện toàn bộ
Transformation of sliding motion to rolling during spheres collision
Granular Matter - Tập 19 - Trang 1-13 - 2017
In this research, we have investigated the three-dimensional elastic collision of two balls, based on friction in the tangential plane. Our aim is to offer analytical closed form relations for post collision parameters such as linear and angular velocities, collision time and tangential and normal impulse in three dimensions. To simplify the problem, stick regime is not considered. In other words,...... hiện toàn bộ
Tilting process with humidity: DEM modeling and comparison with experiments
Granular Matter - Tập 15 Số 5 - Trang 629-643 - 2013
Cooling after shearing: three possible fates for dense granular materials
Granular Matter - Tập 23 - Trang 1-13 - 2021
We perform discrete element simulations of freely cooling, dense granular materials, previously sheared at a constant rate. Particles are identical, frictional spheres interacting via linear springs and dashpots and the solid volume fraction is constant and equal to 60% during both shearing and cooling. We measure the average and the distributions of contacts per particle and the anisotropy of the...... hiện toàn bộ
Simulation of solitary waves in a monodisperse granular chain using COMSOL multiphysics: localized plastic deformation as a dissipation mechanism
Granular Matter - Tập 16 - Trang 543-550 - 2014
Solitary wave propagation in a monodisperse granular chain was simulated using the finite element method. The model was built to address a discrepancy between numerical and experimental results from Lazaridi and Nesterenko (J Appl Mech Tech Phys 26(3):405–408 1985). In their work, solitary waves were generated in a chain of particles through impact of a piston, and results were quantified by compa...... hiện toàn bộ
Granular element method (GEM): linking inter-particle forces with macroscopic loading
Granular Matter - Tập 14 - Trang 51-61 - 2011
We present a new method capable of inferring, for the first time, inter-particle contact forces in irregularly-shaped natural granular materials (e.g., sands), using basic Newtonian mechanics and balance of linear momentum at the particle level. The method furnishes a relationship between inter-particle forces and corresponding average particle stresses, which can be inferred, for instance, from m...... hiện toàn bộ
Particulate modeling of cementation effects on small and large strain behaviors in granular material
Granular Matter - Tập 19 Số 1 - 2017
Velocity profiles in forced silo discharges
Granular Matter - Tập 21 - Trang 1-6 - 2019
When a granular material is freely discharged from a silo through an orifice at its base, the flow rate remains constant throughout the discharge. However, it has been recently shown that, if the discharge is forced by an overweight, the flow rate increases at the final stages of the discharge, in striking contrast to viscous fluids (Madrid et al. in Europhys Lett 123:14004, 2018). Although the ge...... hiện toàn bộ
Induced force chain anisotropy of cohesionless granular materials during biaxial compression
Granular Matter - Tập 21 - Trang 1-16 - 2019
This paper investigates the induced anisotropy and multi-scale shear characteristics of granular materials by quantifying force chain distribution in two-dimensional specimens of rigid particles under quasi-static loading. A new criterion is proposed and implemented into the existing algorithm which can effectively solve the identification instability of force chains at branching and merging point...... hiện toàn bộ
Tổng số: 1,091
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