Linear and nonlinear models of electroelasticity in the software package ACELAN

The paper presents the Mathematical models of reversible and irreversible processes in the polycrystalline ferroelectric materials (ceramics) for a computational finite element package ACELAN. Irreversible processes are described by the nonlinear models of polarization and depolarization by an electric field and mechanical stress. New release of ACELAN is focused not only on the composite elastic, piezoelectric and acoustic media, but also supplemented by more general materials with connectivity of mechanical, electrical, magnetic and thermal fields.