Deformation Decomposition versus Energy Decomposition for Chemo- and Poro- Mechanics

Abstract

We briefly compare the structure of two popular models to model poro- and chemo- mechanics wherein a fluid phase is transported within a solid phase. The multiplicative deformation decomposition has been used to model permanent inelastic shape change in plasticity and thermal expansion. However, the energetic decomposition provides a more transparent structure and advantages, such as to couple to phase-field fracture, for problems of poro- and chemo- mechanics.