Comparison of Simple and Advanced Constitutive Models with Column Collapse Simulations in the Material Point Method
Publication: Geo-Congress 2023
ABSTRACT
Modeling granular column collapse provides an opportunity to compare simulated large deformation behavior with a variety of previous experimental and numerical findings to improve the understanding and characterization of newly developed soil models. Stemming from the popularity of modeling this experiment, the large deformation response of simple constitutive models, such as Mohr-Coulomb with strain softening (MCSS), is well characterized. In this study, the column collapse behavior of MCSS, NorSand, and bounding surface plasticity (BSP) models are compared. Simulation results indicate that constitutive model selection remains an important consideration. For sufficiently advanced models, such as NorSand, the selection of initial conditions has a greater effect on the runout behavior than the comparatively simple MCSS model. For the BSP model, a shorter runout is observed relative to both MCSS and NorSand models.
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Geo-Congress 2023
Pages: 30 - 39
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Published online: Mar 23, 2023
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