2018
DOI: 10.1002/nme.5800
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Coupling of material point method and discrete element method for granular flows impacting simulations

Abstract: Summary Granular debris flows are composed of coarse solid particles, which may be from disaggregated landslides or well‐weathered rocks on a hill surface. The estimation of agitation and the flow process of granular debris flows are of great importance in the prevention of disasters. In this work, we conduct physical experiments of sandpile collapse, impacting 3 packed wooden blocks. The flow profile, run‐out distance, and rotation of blocks are measured. To simulate the process, we adopt a material point met… Show more

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Cited by 39 publications
(44 citation statements)
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“…The geometrical irregularity of a particle is properly represented as a Minkowski sum of a polygon with a disk, and the multiple contacts between irregular particles are calculated based on distances between vertices and edges. These features make it computationally efficient . The contact information between MPM and the SDEM can be easily applied to the correct position of SDEM instead of its geometrical modes.…”
Section: Spheropolygon Discrete Element Methodsmentioning
confidence: 99%
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“…The geometrical irregularity of a particle is properly represented as a Minkowski sum of a polygon with a disk, and the multiple contacts between irregular particles are calculated based on distances between vertices and edges. These features make it computationally efficient . The contact information between MPM and the SDEM can be easily applied to the correct position of SDEM instead of its geometrical modes.…”
Section: Spheropolygon Discrete Element Methodsmentioning
confidence: 99%
“…The conservation of energy is guaranteed because the simulation assumes an isothermal setting that does not involve the exchange of heat. Therefore, the dynamic state of the material can be obtained by solving the conservation of moment: σij,j+ρbi=ρtrueu¨i, where ρ is the density of the material; u i denotes the displacement, the dots are the notation for the order of time derivative; σ ij is the Cauchy stress tensor, the subscript denotes the components and the deviator of the tensor; b i is the body force term. The PDEs follow Einstein notation.…”
Section: Mpm For Elastic and Granular Materialsmentioning
confidence: 99%
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