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If it is added from the Physics ribbon (Windows users), Physics contextual toolbar (macOS and Linux users), or context menu (all users), then the first physics interface of each type in the component is selected as the default.
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If it is added automatically when either Electrostriction or Ferroelectroelasticity multiphysics interface has been selected in the Model Wizard or Add Physics window, then the participating Solid Mechanics and Electrostatics interfaces are selected.
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For nonsolid dielectric domains, remove them from the Solid Mechanics interface selection but keep them selected in the Electrostatics interface selection.
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If this coupling node is used as a part of Ferroelectroelasticity multiphysics interface, the Charge conservation, Ferroelectric feature under the corresponding Electrostatics interface also contains an input for the saturation polarization. That input will then become inaccessible (grayed out), and the value entered at this coupling node will be used in all computations.
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