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Simulating granular column collapse using the Material Point Method
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DOI：10.1007/s11440-014-0309-0.png)
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摘要
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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
Keyword:
Avalanche
Contact
Granular flow
Large deformation
Material Point Method
Matsuoka-Nakai
Reaction force
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5.7
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3.0K
被引数:
1.3W
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