FEM simulation of viscous properties for granular materials considering the loading rate effect
Journal article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Peng F.-L., Li F.-L., Tan Y., Kongkitkul W.
Publisher: Springer
Publication year: 2010
Journal: Granular Matter (1434-5021)
Volume number: 12
Issue number: 6
Start page: 555
End page: 568
Number of pages: 14
ISSN: 1434-5021
eISSN: 1434-7636
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
The deformation and strength characteristics of sandy soils as a kind of granular materials are very complex. The experimental results show that when the strain rate suddenly changes in monotonic loading (ML) case, the stress-strain curve of sandy soils changes sharply and then gradually converges into the original inferred one that would be obtained by continuous ML at constant strain rate after having exhibited clear yielding. Similar behaviors are also observed when ML is restarted at a constant strain rate following a creep loading or stress relaxation stage. An elasto-viscoplastic constitutive model for granular materials is developed, which consists of three components. One of the most important features of the model is that it can take into account the effects of loading rate due to viscous properties on the stress-strain behavior. The stress ratio-axial strain- time relations from four drained plain strain compression (PSC) tests on the saturated Toyoura sand are successfully simulated by the finite element method (FEM) code incorporating the proposed constitutive model. It is shown that the FEM code can simulate the viscous behaviors of sand accurately under arbitrary loading history. ฉ Springer-Verlag 2010.
Keywords
Elastoviscoplastic, Granular material, Loading rate effect
Contact Information