The Ferroelectroelasticity interface () combines Solid Mechanics and Electrostatics together with the constitutive relationships required to model nonlinear electromechanical interaction in ferroelectric and piezoelectric materials. Electric polarization in such materials depends nonlinearly on the applied electric field including possible hysteresis and saturation effects. In addition, the polarization and mechanical deformations in such materials can be strongly coupled due to the electrostriction effect.

The Ferroelectroelasticity interface is available for 3D, planar 2D, and axisymmetric 2D geometries.

When this multiphysics interface is added using the Model Wizard, a Solid Mechanics interface and an Electrostatics interface are added to the Model Builder.

In addition, the Multiphysics Couplings node is added, which automatically includes the multiphysics coupling feature Electrostriction.

The full functionality of the Solid Mechanics and Electrostatics interfaces is accessible under the corresponding interfaces at the domain, boundary line, or point level in the geometry. The participating Electrostatics interface includes the default Charge Conservation, Ferroelectric feature with its selection set to all domains. Such features can be also added manually to any Electrostatics interface in the model.