Predicting the dependency of a degree of saturation on void ratio and suction using effective stress principle for unsaturated soils

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Interpretation of unsaturated soil behaviour in the stress – Saturation space, I: Volume change and water retention behaviour (2012, background): “, [9,27,42,23] Recent research [37] shows that the hydraulic behaviour is governed by the suction as well as the volumetric strain due to net stresses ðev rÞ.”
Investigation into water retention behaviour of deformable soils (2013, background): “In most of the published models (Gallipoli et al. 2003; Mbonimpa et al. 2006; Nuth and Laloui 2008; Mašín 2010), the degree of saturation is linked to the void ratio through simple relationships that proved to be effective in the range of suction where capillarity predominates (low to moderate…”
A meshfree method for fully coupled analysis of flow and deformation in unsaturated porous media (2013, methodology): “The dependency of the soil water characteristic curve (SWCC) to volume change is taken into account through an extension of the work of Masin [29] to include both branches of main wetting and main drying as well as transition from wetting to drying and vice versa.”
Clay hypoplasticity with explicitly defined asymptotic states (2013, methodology): “This model, combined with the water retention model by Maš́ın [28], has been compared with different constitutive models for unsaturated soils in a benchmark test described by D’Onza et al.”