Article (Scientific journals)
ACMEG-TS: A constitutive model for unsaturated soils under non-isothermal conditions.
François, Bertrand; Laloui, Lyesse
2008In International Journal for Numerical and Analytical Methods in Geomechanics, 32, p. 1955-1988
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Keywords :
temperature; unsaturated soils; elasto-plasticity; constitutive modelling; generalized effective stress; environmental geomechanics
Abstract :
[en] This paper introduces an unconventional constitutive model for soils, which deals with a unified thermomechanical modelling for unsaturated soils. The relevant temperature and suction effects are studied in light of elasto-plasticity. A generalized effective stress framework is adopted, which includes a number of intrinsic thermo-hydro-mechanical connections, to represent the stress state in the soil. Two coupled constitutive aspects are used to fully describe the non-isothermal behaviour. The mechanical constitutive part is built on the concepts of bounding surface theory and multi-mechanism plasticity, whereas water retention characteristics are described using elasto-plasticity to reproduce the hysteretic response and the effect of temperature and dry density on retention properties. The theoretical formulation is supported by comparisons with experimental results on two compacted clays.
Disciplines :
Civil engineering
Author, co-author :
François, Bertrand  ;  Ecole Polytechnique Fédérale de Lausanne - EPFL > Soil Mechanics laboratory
Laloui, Lyesse
Language :
English
Title :
ACMEG-TS: A constitutive model for unsaturated soils under non-isothermal conditions.
Publication date :
2008
Journal title :
International Journal for Numerical and Analytical Methods in Geomechanics
ISSN :
0363-9061
eISSN :
1096-9853
Publisher :
John Wiley & Sons, New York, United States - New York
Volume :
32
Pages :
1955-1988
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 October 2009

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