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A Framework for Modelling the Time-Dependent Behaviour of Unsaturated Rocks Based on Irreversible Thermodynamics
The time-dependent response of rocks is strongly influenced by saturating pore fluids. This paper presents a theoretical framework for the modelling of the time-dependent behaviour of unsaturated rocks. This framework is constructed based on the theory of poromechanics combined with irreversible thermodynamics. Delayed inelastic deformation is modelled using the theory of viscoplasticity and isotropic creep damage which both are governed by a plastic effective stress. This framework strikes a balance between different requirements in constitutive modelling: capability to reproduce the rock behaviour, simplicity for engineering applications and thermodynamic consistency. Its applicability is illustrated by formulating a specific constitutive model which has been validated against experimental data.
A Framework for Modelling the Time-Dependent Behaviour of Unsaturated Rocks Based on Irreversible Thermodynamics
The time-dependent response of rocks is strongly influenced by saturating pore fluids. This paper presents a theoretical framework for the modelling of the time-dependent behaviour of unsaturated rocks. This framework is constructed based on the theory of poromechanics combined with irreversible thermodynamics. Delayed inelastic deformation is modelled using the theory of viscoplasticity and isotropic creep damage which both are governed by a plastic effective stress. This framework strikes a balance between different requirements in constitutive modelling: capability to reproduce the rock behaviour, simplicity for engineering applications and thermodynamic consistency. Its applicability is illustrated by formulating a specific constitutive model which has been validated against experimental data.
A Framework for Modelling the Time-Dependent Behaviour of Unsaturated Rocks Based on Irreversible Thermodynamics
Bui, T. A. (Autor:in) / Wong, H. (Autor:in) / Deleruyelle, F. (Autor:in)
Sixth Biot Conference on Poromechanics ; 2017 ; Paris, France
Poromechanics VI ; 988-996
06.07.2017
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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