Modelling the chemo-mechanical responses of solid solutions far from equilibrium under heterogeneous stresses

Abstract

We present a coupled thermodynamically-consistent framework for the reactive chemo-mechanical responses of solid solutions. Specifically, we focus on chemically active solid solutions subject to mechanical effects due to heterogeneous stresses distributions, where the stress generation process (pressure) is driven solely by volume changes associated with the chemical processes. Throughout this paper, we use the model to describe common geological processes. Furthermore, simulation results of a three-phases solid solution provide insights into the phenomena and verify the interleaving between the physical and chemical interactions at solid-state. In particular, we show the evolution of the thermodynamic pressure as the system goes to the steady state.

Authors 3

1. Santiago Peña Clavijo corresponding

   Curtin University

   Affiliation as printed

   Curtin University

   School of Earth and Planetary Sciences, Curtin University, Kent Street, Bentley, Perth, WA 6102, Australia

2. Luis Espath Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University

3. Victor M. Calo

   Curtin University · King Abdullah University of Science and Technology · Commonwealth Scientific and Industrial Research Organisation

   Affiliation as printed

   KAUST

   Curtin Institute for Computation, Curtin University, Kent Street, Bentley, Perth, WA 6102, Australia

   Mineral Resources, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Kensington, Perth, WA 6152, Australia

   School of Earth and Planetary Sciences, Curtin University, Kent Street, Bentley, Perth, WA 6102, Australia