期刊
SOFTWAREX
卷 15, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.softx.2021.100735
关键词
Clumps of spheres; Clusters; Irregular particles; Discrete Element Method; Particle morphology
资金
- UK Royal Society [IEC/R3/183026]
- Japan Society for the Promotion of Science [JPJSBP120195701]
- Engineering and Physical Sciences Research Council (EPSRC), UK [EP/R001766/1]
- Newcastle University
- EPSRC [EP/R001766/1] Funding Source: UKRI
This study focuses on the role of particle shape in the mechanical and rheological behavior of particulate and granular materials. It introduces a unified framework for generating clumps or clusters to approximate particle morphology, along with a novel generation technique. The effects of clump-generation techniques on granular assemblies' mechanical behavior are investigated through triaxial compression tests.
Particle shape plays a key role in the mechanical and rheological behaviour of particulate and granular materials. The simulation of particulate assemblies typically entails the use of Molecular Dynamics, where spheres are the predominant particle shape, and the Discrete Element Method (DEM). Clumps and clusters of spheres have been used to simulate non-spherical particles, primarily due to the simplicity of contact detection among spheres and their ability to approximate practically any irregular geometry. Various approaches have been proposed in the literature to generate such clumps or clusters, while open-source numerical codes applying these are scanty. The CLUMP code, proposed in this paper, provides a unified framework, where a particle morphology can be approximated using different clump-generation approaches from the literature. This framework allows comparing the representations of the particle generated by the different approaches both quantitatively and qualitatively, providing the user with the tools to decide which approach is more appropriate for their application. Also, one novel generation technique is proposed. Outputs are provided in formats used by some of the most popular DEM codes. Moreover, the resulting clumps can be transformed into surface meshes, allowing for easy characterisation of their morphology. Finally, the effect of clump-generation techniques on the mechanical behaviour of granular assemblies is investigated via triaxial compression tests. (C) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC
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