Simulating granular column collapse using the Material Point Method

Carter M. Mast

doi:10.1007/s11440-014-0309-0

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Simulating granular column collapse using the Material Point Method

2014-05-06

PRE

Carter M. Mast

Pedro Arduino *

Peter Mackenzie‐Helnwein

Gregory R. Miller

DOI：10.1007/s11440-014-0309-0

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Abstract

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This paper presents an analysis of sand column collapse phenomena using the Material Point Method and a non-associative variant of the Matsuoka-Nakai constitutive framework, resulting in a simulation environment capable of emulating the mechanical response of a family of granular materials representing typical sands with a wide range of friction and critical state angles. A series of two-dimensional sand column collapse configurations are analyzed, and results evaluated qualitatively in light of outcomes from existing experimental and numerical simulations from the literature. Key geometric relationships are identified linking the final deposit geometry to the initial configuration via the aspect ratio, a. This work shows the internal friction angle influences the final geometry significantly and discusses various aspects of the collapse dynamics. The net deformation, stress, and base contact/reaction forces are examined in detail

Keywords:

Avalanche

Contact

Granular flow

Large deformation

Material Point Method

Matsuoka-Nakai

Reaction force

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