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Framework for incorporating multi-level morphology of particles in DEM simulations: independent control of polydisperse distributions of roundness and roughness while preserving form distributions in granular materials
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Framework for incorporating multi-level morphology of particles in DEM simulations: independent control of polydisperse distributions of roundness and roughness while preserving form distributions in granular materials
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Journal Article
Framework for incorporating multi-level morphology of particles in DEM simulations: independent control of polydisperse distributions of roundness and roughness while preserving form distributions in granular materials
2024
Overview
Particle shape in granular materials exhibits both polydisperse and multi-level characteristics, which are intrinsically linked to the mechanical behaviours of granular materials. This study develops a particle generation framework to achieve independent control of polydisperse distributions of roundness (second level of particle shape) and roughness (third level) while preserving form (first level) distributions. In this framework, a spherical harmonic amplitude-stretching (SH amplitude-stretching) technique is proposed to precisely control the form distributions. Two decisive factors for particle roundness and roughness are introduced, and two control coefficients are designed to determine their distributions. The applicability of the proposed framework is verified by employing the generated granular assemblies with varying distributions of particle roundness and roughness into DEM simulations for granular packing and repose angle tests. The simulation results demonstrate the independent effects of polydisperse distributions of particle roundness and roughness on packing density and repose angle, providing evidence of the effectiveness of the proposed framework.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
