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A hypoplastic model for mechanical response of unsaturated soils
Author(s) -
Mašín David,
Khalili Nasser
Publication year - 2008
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.714
Subject(s) - stiffening , geotechnical engineering , wetting , constitutive equation , soil water , suction , triaxial shear test , mechanics , materials science , geology , engineering , structural engineering , soil science , physics , finite element method , composite material , mechanical engineering , shear (geology)
A new constitutive model is developed for the mechanical behaviour of unsaturated soils based on the theory of hypoplasticity and the effective stress principle. The governing constitutive relations are presented and their application is demonstrated using several experimental data from the literature. Attention is given to the stiffening effect of suction on the mechanical response of unsaturated soils and the phenomenon of wetting‐induced collapse. All model parameters have direct physical interpretation, procedures for their quantification from test data are highlighted. Quantitative predictions of the model are presented for wetting, drying and constant suction tests. Copyright © 2008 John Wiley & Sons, Ltd.