Multiscale, multiphysics modeling of saturated granular materials in large deformation

Liang W.; Zhao J.; Wu H.Soga K.

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Multiscale, multiphysics modeling of saturated granular materials in large deformation

机译：Multiscale, multiphysics modeling of saturated granular materials in large deformation

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? 2022 Elsevier B.V.We propose a multiscale, multiphysics approach by coupling two-phase material point method (MPM) with discrete element method (DEM) (MPM-DEM) to simulate the hydro-mechanical coupling responses of saturated granular media from small strain en route to large deformation under either quasi-static or dynamic loading conditions. The multiscale scheme is featured by (a) using a two-phase MPM in conjunction with the u?v?p formulation to solve the solid–fluid interactions in the macroscopic domain of a boundary value problem of saturated porous media, and (b) employing a DEM assembly comprised of arbitrarily shaped particles to provide path-dependent effective constitutive responses for each material point under complex loading conditions. A semi-implicit integration scheme based on the fractional step algorithm is further implemented in the proposed multiscale approach to improve its overall efficiency. The proposed approach is validated by the one-dimensional consolidation test before being further used to simulate more challenging problems, including the cyclic shaking test, the column collapse, and the wave propagation in anisotropic saturated porous media. We demonstrate that the proposed MPM-DEM approach is powerful and versatile in capturing the complicated static and dynamic multiphysics interactions exhibited in saturated granular media that could be of practical importance in various engineering settings. We further establish connections between these macroscopic observations with their underlying microstructural mechanisms to offer multiscale insights into the complicated dynamic responses of saturated sand.

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《Computer Methods in Applied Mechanics and Engineering》 |2023年第15期|1-27|共27页
作者
Liang W.; Zhao J.; Wu H.Soga K.;
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作者单位

Department of Civil and Environmental Engineering Hong Kong University of Science and Technology;

Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyDepartment of Civil and Environmental Engineering Hong Kong University of Science and Technology||HKUST Shenzhen-Hong Kong Collaborative Innovation Research In;

School of Civil Engineering Chongqing UniversityDepartment of Civil and Environmental Engineering University of California;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
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关键词
Dynamic loading; Hydro-mechanical coupling; Large deformation; Multiscale and multiphysics modeling; Saturated granular material;

Multiscale, multiphysics modeling of saturated granular materials in large deformation

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