This paper presents an analytical investigation on the stability of multiphase porous media subjected to changes in fluid pressures and/or saturation conditions. For this purpose, we revisit the concept of second-order work and explore its relation with the incremental energy input in partially saturated media. Our analytical results show that second-order work contributions do not involve only effective stresses and skeletal deformation, but also depend on the changes in fluid pressures and degree of saturation. This result provides a novel approach to address unstable processes in unsaturated porous media and enables a number of theories originally conceived only for fluid-saturated compounds to be extended for unsaturated media

Saturation-induce failure: mechanics of a class of unstable processes.

BUSCARNERA, GIUSEPPE;DI PRISCO, CLAUDIO GIULIO
2013

Abstract

This paper presents an analytical investigation on the stability of multiphase porous media subjected to changes in fluid pressures and/or saturation conditions. For this purpose, we revisit the concept of second-order work and explore its relation with the incremental energy input in partially saturated media. Our analytical results show that second-order work contributions do not involve only effective stresses and skeletal deformation, but also depend on the changes in fluid pressures and degree of saturation. This result provides a novel approach to address unstable processes in unsaturated porous media and enables a number of theories originally conceived only for fluid-saturated compounds to be extended for unsaturated media
Poromechanics V: Proceedings of the Fifth Biot Conference on Poromechanics
9780784412992
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/766090
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