The Thermoelasticity multiphysics interface (
) can be found under the
Thermal-Structure Interaction (
) branch within the
Structural Mechanics branch (
) when adding a physics interface using the Model Wizard or the Add Physics window. The thermoelastic effect results in local cooling of material under tension and heating of material that is compressed. Irreversible heat transfer occurs between the warm and cool regions of the solid, producing mechanical losses, which can be important, particularly for small structures.
In the Settings window for the Solid Mechanics interface, the Structural Transient Behavior is set to
Include inertial terms by default. In the Settings window for Thermal Expansion, under the section
Heat Sources, the check box for
Thermoelastic damping is enabled by default.
For example, if single Solid Mechanics and
Heat Transfer in Solids interfaces are added, then COMSOL Multiphysics adds an empty
Multiphysics node. You can then choose the
Thermal Expansion coupling feature.
The Fluid-Solid Interaction Interface node is described in the section
The Thermal Stress, Solid Interface in the
Structural Mechanics User’s Guide.