Coupling Loss
The Coupling Loss subnode allows you to model losses in the piezoelectric coupling in a Piezoelectric Material, either by using the loss factor material data for the coupling matrix or as Rayleigh proportional damping.
The Coupling Loss subnode is only available with some COMSOL products (see https://www.comsol.com/products/specifications/).
Coupling Loss Settings
Select a Coupling loss — Loss factor for e or Rayleigh damping.
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For Loss factor for e select a Loss factor for coupling matrix e from the list. Select User defined to enter values or expressions for ηe in a 3-by-6 matrix. This choice is effective only in Eigenfrequency and Frequency Domain study.
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For Rayleigh damping enter a Stiffness damping parameter βdC. This choice can be used in Eigenfrequency Frequency Domain, and Time Dependent study.
See also Piezoelectric Losses.
Location in User Interface
Context Menus
Solid Mechanics>Piezoelectric Material>Coupling Loss
Layered Shell>Piezoelectric Material>Coupling Loss
Ribbon
Physics tab with Piezoelectric Material node selected in the model tree:
Attributes>Coupling Loss