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- W3137805940 abstract "Abstract Realistic yet efficient representation of particle shape is a major challenge for the Discrete Element Method. This paper uses angle-of-repose and direct-shear test simulations to describe the influence of several shape representation methods, and their parameters, on the bulk response of granular assemblies. Three rolling resistance models, with varying coefficient of rolling friction, are considered for spherical particles. For non-spherical particles, superquadrics with varying blockiness and multi-spheres with varying bumpiness are used to model cuboids and cylinders of several aspect ratios. We present extensive quantitative results showing how the various ways used to represent shape affect the bulk response, allowing comparisons between different approaches. Simulations of angle-of-repose tests show that all three rolling friction models can model the avalanching characteristics of cube/cuboid and cylindrical particles. Simulations of direct-shear tests suggest that both the shear strength and the dilative response of the considered non-spherical particles (but not their porosity) can only be predicted by the elasto-plastic rolling resistance model. The quantitative nature of the results allows identifying values of the shape-description parameters that can be used to obtain similar results when using alternative shape representation methods. Graphical abstract" @default.
- W3137805940 created "2021-03-29" @default.
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- W3137805940 date "2021-03-16" @default.
- W3137805940 modified "2023-09-27" @default.
- W3137805940 title "Influence of various DEM shape representation methods on packing and shearing of granular assemblies" @default.
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- W3137805940 doi "https://doi.org/10.1007/s10035-020-01078-y" @default.
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