Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical modeling of free-falling spherical penetrometer–clay–water interactions
Large deformation finite element simulations of the dynamic penetration of underwater free-fall spherical penetrometers into clay are carried out using the coupled Eulerian–Lagrangian approach. Two undrained total stress analysis models are constructed and applied to simulate four well-documented centrifuge tests of sphere penetration. Model A is a new model that simulates both the free-fall process in water and the penetration process in clay. Model B, as usual, simulates only the penetration process in clay in the absence of overlying water. The simulation of the free-fall process in water is validated against an analytical solution and calibrated against the measured impact velocities of the tested spheres upon hitting the clay surface. The ability of the two models to predict the dynamic penetration behavior in clay is evaluated by comparing their results with the centrifuge test results. Model A provides a better prediction of the penetration behavior than Model B. Fully open, partially closed, and fully closed cavities formed by the passages of the sphere and water were reproduced by Model A. The water flow in the wake of the penetrating sphere is shown to have an important influence on the deformations of the clay surface and cavity wall.
Numerical modeling of free-falling spherical penetrometer–clay–water interactions
Large deformation finite element simulations of the dynamic penetration of underwater free-fall spherical penetrometers into clay are carried out using the coupled Eulerian–Lagrangian approach. Two undrained total stress analysis models are constructed and applied to simulate four well-documented centrifuge tests of sphere penetration. Model A is a new model that simulates both the free-fall process in water and the penetration process in clay. Model B, as usual, simulates only the penetration process in clay in the absence of overlying water. The simulation of the free-fall process in water is validated against an analytical solution and calibrated against the measured impact velocities of the tested spheres upon hitting the clay surface. The ability of the two models to predict the dynamic penetration behavior in clay is evaluated by comparing their results with the centrifuge test results. Model A provides a better prediction of the penetration behavior than Model B. Fully open, partially closed, and fully closed cavities formed by the passages of the sphere and water were reproduced by Model A. The water flow in the wake of the penetrating sphere is shown to have an important influence on the deformations of the clay surface and cavity wall.
Numerical modeling of free-falling spherical penetrometer–clay–water interactions
Acta Geotech.
Gu, Yaotian (Autor:in) / Lei, Guo Hui (Autor:in) / Qin, Xiaogang (Autor:in)
Acta Geotechnica ; 19 ; 2395-2418
01.05.2024
24 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Cavity wall deformation , Clay surface deformation , Large deformation finite element simulation , Underwater free-fall spherical penetrometer , Undrained total stress analysis Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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