A dynamic large deformation finite element method based on mesh regeneration |
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| Institution: | 1. School of Environmental Engineering, Technical University of Crete, Greece;2. School of Rural and Surveying Engineering, National Technical University of Athens, Greece;1. School of Civil Engineering, Chongqing University, No.83 Shabei Street, Chongqing 400045, China;2. School of Qilu Transportation, Shandong University, 12550 East Second Ring Road, Jinan 250002, China;3. College Civil Engineering and Architecture, Research Center of Coastal and Urban, Geotechnical Engineering, Zhejiang University, 310058, China |
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| Abstract: | In this paper, a large deformation finite element (LDFE) approach termed ‘remeshing and interpolation technique with small strain (RITSS)’ is extended from static to dynamic soil-structure interaction applications. In addition, a technique termed ‘element addition’ is developed to improve the computational efficiency of both static and dynamic LDFE analyses that involve moving boundaries. The RITSS approach is based on frequent mesh generation to avoid element distortion. In dynamic RITSS, the field variables mapped from the old to the new mesh involve not only the stresses and material properties, but also the nodal velocities and accelerations. Using the element addition technique, new soil elements are attached to the domain boundaries periodically when the soil near the boundaries becomes affected by large displacements of the structure. The procedures of this Abaqus-based dynamic LDFE analysis and element addition technique are detailed, and the robustness of the techniques is validated and assessed through three example analyses: penetration of a flat footing into a half-space and movement of rigid and deformable landslides down slopes. |
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| Keywords: | Large deformation Finite element method Clays Penetration Landslides Footing |
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