FEM analyses on rate-dependent behaviors of sand due to its viscous properties
Journal article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Li F., Peng F., Kongkitkul W., Tatsuoka F.
Publication year: 2011
Volume number: 39
Issue number: 1
Start page: 13
End page: 17+47
ISSN: 0253-374X
eISSN: 0253-374X
Abstract
Based on the experimental results from drained plane strain compression (PSC) tests on saturated sand under complex loading histories, the rate-dependent behaviors of sand due to its viscous properties were studied. It was found that sand exhibits obvious loading rate effects, creep deformation and stress relaxation. When monotonic loading was restarted immediately after a step-change in the strain rate or following a creep loading or stress relaxation stage, the stress-strain relation showed a very high tangent stiffness. A nonlinear finite element method (FEM) analysis technique was developed. In the FEM analyses, the sand was described by the three-component elasto-viscoplastic constitutive model. It was shown that the present FEM analyses can properly simulate the global stress-strain relationships obtained from the experiments. And the whole process including the variable strain rate loadings, the creep loading and stress relaxation stages were implemented in the FEM analyses.
Keywords
Elasto-viscoplastic properties, Loading rate
Contact Information