Chemo-mechanical coupling and damage enhanced dissolution at intergranular contact

TitleChemo-mechanical coupling and damage enhanced dissolution at intergranular contact
Publication TypeConference Paper
Year of Publication2004
AuthorsT Hueckel, and LB Hu
Conference NameNumerical Models in Geomechanics 9th Proceedings of the International Symposium on Numerical Models in Geomechanics, Numog 2004
Date Published01/2004
Abstract

Many processes in geomechanics, such as structuration and aging of natural soils, compaction and pressure solution of oil bearing sediments involve mineral dissolution at grain contacts. Dissolution and subsequent precipitation lead to a redistribution of mass within the pore space, affecting soil porosity and stiffness. We simulate dissolution at a micro scale using chemo-plasticity for penetration of asperity. We assume that dilatancy resulting from material damage generates new free surface around the asperity, in turn accelerating dissolution and material weakening.