Time homogenization for clays subjected to large numbers of cycles

Papon, A., Yin, Z. -Y., Riou, Y. and Hicher, P. -Y. (2013) Time homogenization for clays subjected to large numbers of cycles. International Journal for Numerical and Analytical Methods in Geomechanics, 37 11: 1470-1491. doi:10.1002/nag.2092

Author Papon, A.
Yin, Z. -Y.
Riou, Y.
Hicher, P. -Y.
Title Time homogenization for clays subjected to large numbers of cycles
Journal name International Journal for Numerical and Analytical Methods in Geomechanics   Check publisher's open access policy
ISSN 0363-9061
Publication date 2013-08-10
Year available 2012
Sub-type Article (original research)
DOI 10.1002/nag.2092
Volume 37
Issue 11
Start page 1470
End page 1491
Total pages 22
Place of publication United Kingdom
Publisher John Wiley & Sons
Language eng
Formatted abstract
This paper discusses the reliability and the efficiency of a time homogenization method employed to reduce the computational time during cyclic loading for two common geotechnical tests and two elastoplastic models for clays. The method of homogenization is based upon splitting time into two separate scales. The first time scale relates to the period of cyclic loading and the second to the characteristic time of the fatigue phenomenon. The time homogenization method is applied to simulate an undrained triaxial test (homogeneous stress state) and a pressuremeter test (nonhomogeneous stress state) under one-way cyclic loading on normally consolidated clay. This method is coupled with two elastoplastic models dedicated to cyclic behavior of clay (a bounding surface plasticity model and a bubble model). Both linear and nonlinear elasticities are considered. The difficulty encountered when applying this method to models introducing nonlinear elasticity and kinematic hardening is pointed out. The performance of time homogenization related to the main parameters is numerically investigated by comparison with conventional finite element simulations.
Keyword Time homogenization
Cyclic loading
Constitutive models
Pressuremeter test
Finite element method
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 24 MAY 2012

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Earth Sciences Papers
Earth Systems Science Computational Centre Publications
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