Lookup NU author(s): Dr Mohamed Rouainia
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
This paper presents a constitutive modelling approach for the viscoplastic-damage behaviour of geomaterials. This approach is based on the hyperelasticity framework, where the entire constitutive behaviour is derived from only two scalar potentials: a free-energy potential and a dissipation function. The novelty of the new proposed model, in addition to being thermodynamically consistent, is that it requires only a few parameters that can be derived from conventional laboratory testing. The model has been specifically tested for its ability to reproduce a series of triaxial compression tests on core rock samples. The comparison between the viscoplastic-damage model predictions and experimental results shows that the model is remarkably successful in capturing the stress–strain response both at peak stress and in the region of material softening and the time to reach failure.
Author(s): Osman AS, Birchall TJ, Rouainia M
Publication type: Article
Publication status: Published
Journal: Geotechnical Research
Print publication date: 20/03/2020
Online publication date: 26/11/2019
Acceptance date: 24/10/2019
Date deposited: 03/01/2020
ISSN (electronic): 2052-6156
Publisher: ICE Publishing
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