Gradient flows for coupling order parameters and mechanics
- Schmeller, Leonie
- Peschka, Dirk
2020 Mathematics Subject Classification
- 74A15 74C20 76D45 76A10
- Gradient flows, incremental minimization, phase-fields, finite strain, gels
We construct a formal gradient flow structure for phase-field evolution coupled to mechanics in Lagrangian coordinates, present common ways to couple the evolution and provide an incremental minimization strategy. While the usual presentation of continuum mechanics is intentionally very brief, the focus of this paper is on an extensible functional analytical framework and a discretization approach that preserves an appropriate variational structure as much as possible. As examples, we first present phase separation and swelling of gels and then the approach of stationary states of multiphase systems with surface tension and show the robustness of the general approach.