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Unification of plastic compression in a coupled mechanical and water retention model for unsaturated soils

Lloret-Cabot, Martí; Wheeler, Simon J.; Sánchez, Marcelo

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Authors

Simon J. Wheeler

Marcelo Sánchez



Abstract

In 2003, Wheeler, Sharma, and Buisson presented an elastoplastic constitutive model for unsaturated soils that represents both the mechanical behaviour and water retention behaviour, including the coupling between them. A crucial feature of the model is that the occurrence of plastic compression during all types of stress path is unified as a single process, with plastic compression during loading, plastic compression during wetting (collapse compression), and plastic compression during drying (irreversible shrinkage) all represented by yielding on a single loading–collapse yield curve. This paper explains how the model is able to predict the possible occurrence of plastic compression during each type of stress path and, in each case, links this to a physical explanation of the process involved. A simulation of an experimental test demonstrates the capability of the model to accurately predict the variation of both the void ratio and degree of saturation during successive stages of drying, loading, and wetting, where large magnitudes of compression occurred in all three test stages.

Citation

Lloret-Cabot, M., Wheeler, S. J., & Sánchez, M. (2014). Unification of plastic compression in a coupled mechanical and water retention model for unsaturated soils. Canadian Geotechnical Journal, 51(12), 1488-1493. https://doi.org/10.1139/cgj-2013-0360

Journal Article Type Article
Acceptance Date Mar 20, 2014
Online Publication Date Apr 2, 2014
Publication Date Apr 2, 2014
Deposit Date Oct 2, 2018
Publicly Available Date Nov 21, 2018
Journal Canadian Geotechnical Journal
Print ISSN 0008-3674
Electronic ISSN 1208-6010
Publisher Canadian Science Publishing
Peer Reviewed Peer Reviewed
Volume 51
Issue 12
Pages 1488-1493
DOI https://doi.org/10.1139/cgj-2013-0360

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