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.
Shell Properties
Select the layer or layers for which this loss model is to be used.
Table 6-21: Layer Selections; Coupling Loss
Selection
Use All Layers
Selection of Individual Layers
Boundary
Same as parent selection when the node is added.
When Use all layers is not selected.
Only a subset of the layers selected in the parent can be selected.
When the loss model differs between layers, you will need to add several Coupling Loss nodes with different layer selections. If the model is the same, and only the material data values differ, you can for most models use a single Coupling Loss node with From material. The data for each layer is then received from global Layered Material nodes.
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All other settings for the Coupling Loss node are described in the documentation for Coupling Loss in the Solid Mechanics interface.
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For a general description of layer and interface selections, see The Shell Properties and Interface Selection Sections.
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You can describe loss values with a through-thickness variation by explicitly or implicitly using expressions containing the extra dimension coordinate as described in Using the Extra Dimension Coordinates.
Location in User Interface
Context Menus
Layered Shell>Piezoelectric Material>Coupling Loss
Ribbon
Physics tab with Piezoelectric Material node selected in the model tree:
Attributes>Coupling Loss