Coupled Hydro-Mechanical Elastoplastic Constitutive Model for Unsaturated Sands and Silts. II: Integration, Calibration, and Validation
Publication: International Journal of Geomechanics
Volume 12, Issue 3
Abstract
Following the comprehensive model formulation given in Part I, a fully implicit integration procedure for the rate equations using a closest point projection method is presented in this paper. The stress-update algorithm and calibration procedure for all the model parameters are discussed in detail. Two sets of laboratory test results, one from unsaturated Minco silt and another one from Toyoura sand, are used to validate the proposed model. The model is shown to have the ability to capture the coupling effects between hydro- and mechanical behavior and predict the laboratory tests reasonably well.
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Acknowledgments
This work was supported by the U.S. National Science Foundation (Grant No. CMS-0301457) and the Oklahoma Center for the Advancement of Science and Technology (Project No. AR081-045).
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Published In
International Journal of Geomechanics
Volume 12 • Issue 3 • June 2012
Pages: 248 - 259
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jul 28, 2010
Accepted: May 19, 2011
Published online: May 23, 2011
Published in print: Jun 1, 2012
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