In a recent paper we propose a new hydro-mechanically coupled hypoplastic constitutive model in three dimensional space. Despite the suction influence on the mechanical behaviour of soils, the model is able to describe accurately wetting-induced collapse of soils.

In this paper, a generalized hypoplastic constitutive model for unsaturated soils is presented. The performance of the proposed model is demonstrated by backcalculation of a well-documented experimental study on over 30 samples of compacted Pearl clay under isotropic as well as triaxial loading conditions. For this purpose, the proposed model is coupled with a hypoplastic model for the soil-water retention curve, which interrelates the effective degree of saturation with the suction and the void ratio.

Tafili, M. & Machaček, J. (2023). Generalized hydro-mechanically coupled hypoplastic constitutive model for unsaturated collapsible soils. Canadian Geotechnical Journal. DOI: https://doi.org/10.1139/cgj-2022-0633

The paper is available at the following Link