Modeling the hydro-mechanical responses of strip and circular punch loadings on water-saturated collapsible geomaterials |
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Authors: | WaiChing Sun Qiushi Chen Jakob T Ostien |
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Institution: | 1. Department of Civil Engineering and Engineering Mechanics, Columbia University, 500 West 120th Street, New York, NY, 10027, USA 2. Glenn Department of Civil Engineering, Clemson University, 101 Sikes Avenue, Clemson, SC, 29634, USA 3. Mechanics of Materials Department, Sandia National Laboratories, 7011 East Avenue, Livermore, CA, 94550, USA
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Abstract: | A stabilized enhanced strain finite element procedure for poromechanics is fully integrated with an elasto-plastic cap model to simulate the hydro-mechanical interactions of fluid-infiltrating porous rocks with associative and non-associative plastic flow. We present a quantitative analysis on how macroscopic plastic volumetric response caused by pore collapse and grain rearrangement affects the seepage of pore fluid, and vice versa. Results of finite element simulations imply that the dissipation of excess pore pressure may significantly affect the stress path and thus alter the volumetric plastic responses. |
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