Abstract
A constitutive model has been formed that uses data from isotropic consolidation tests and consolidated undrained triaxial tests with pore-water pressure measurement. It provides functional expressions for p′−εv, q−εs, p′−εs, and q−εv relationships in soils. Here the model has been calibrated for two different densities of the sand–bentonite "buffer" proposed for nuclear fuel waste containment in Canada. Predictions for constant-p′ tests (not used in calibrating the model) are compared with experimentally measured values. Key words: constitutive modelling, hypoelasticity, sand–bentonite, nonlinearity, anisotropy, dilatancy, compression, consolidation.
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