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A novel multi-scale large deformation approach for modelling of granular collapse

Abstract : Collapse of granular material is usually accompanied by long run-out granular flows in natural hazards, e.g., rock/debris flow and snow avalanches. This paper presents a novel multi-scale approach for modelling granular column collapse with large deformation. This approach employs the smoothed particle hydrodynamics (SPH) method to solve large deformation boundary value problems while using a micromechanical model to derive the non-linear material response required by the SPH method. After examining the effect of initial cell size, the proposed approach is subsequently applied to simulate the flow of granular column in a rectangular channel at a low water content by varying the initial aspect ratio. The numerical results show good agreement with various experimental observations on both collapse process and final deposit morphology. Furthermore, the mesoscale behaviour is also captured owing to the advantages of the micromechanical model. Finally, it was demonstrated that the novel multi-scale approach is helpful in improving the understanding of granular collapse and should be an effective computational tool for the analysis of real-scale granular flow.
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https://hal-amu.archives-ouvertes.fr/hal-03120387
Contributor : Marie Miot Connect in order to contact the contributor
Submitted on : Monday, January 25, 2021 - 2:49:33 PM
Last modification on : Friday, December 17, 2021 - 4:13:27 PM
Long-term archiving on: : Monday, April 26, 2021 - 7:07:16 PM

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Hao Xiong, Zhen-Yu Yin, François Nicot, Antoine Wautier, Marie Miot, et al.. A novel multi-scale large deformation approach for modelling of granular collapse. Acta Geotechnica, Springer Verlag, 2021, 16, pp.2371-2388. ⟨10.1007/s11440-020-01113-5⟩. ⟨hal-03120387⟩

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