Abstract
The interactions between soil and water are ubiquitous in reality, and the infiltration or flush by water often leads to soil’s deformation and failure, which are very common in film scenes. In recent years, the material point method (MPM) has been applied to animate different materials with convincing effects, but soils, as a kind of widely spread natural material too, are relatively less considered yet. In this paper, we propose an optimized MLS-MPM to model soil-water mechanics. In our method, soil stress is updated with the increments of strain and vorticity, and a Drucker-Prager model with tension cut-off is employed to model the linear isotropic poroelasticity of soils. The plasticity model is implemented with a return mapping algorithm, being \(O(n^3)\) faster than the traditional way. The soil-water coupling scheme is achieved by momenta exchange between them following Darcy’s law. The method shows a great boost by reducing the number of matrix multiplication operations when computing stress and updating deformation gradient. The efficacy of our method is validated by a set of test scenes and benchmarks.
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Acknowledgment
This work was partially supported by the National Natural Science Foundation of China (Grant No. 62162068, 61540062), the Yunnan Ten Thousand Talents Program and Yunling Scholars Special Project (Grant No. YNWR-YLXZ-2018-022), the Yunnan Provincial Science and Technology Department-Yunnan University “Double First Class” Construction Joint Fund Project (Grant No. 2019FY003012), and the Graduate Research and Innovation Fund Project of Yunnan University (Grant No. 2021Y277).
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Xiong, Z., Zhang, H., Li, H., Xu, D. (2022). An Optimized Material Point Method for Soil-Water Coupled Simulation. In: Magnenat-Thalmann, N., et al. Advances in Computer Graphics. CGI 2022. Lecture Notes in Computer Science, vol 13443. Springer, Cham. https://doi.org/10.1007/978-3-031-23473-6_44
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