Mechanical Damping
The Mechanical Damping subnode allows you to model mechanical losses in the Piezoelectric Material and , either using loss factor material data for the stiffness, or in the form of Rayleigh proportional damping.
Shell Properties
Select the layer or layers for which this damping model is to be used.
Table 6-20: Layer Selections; Mechanical damping
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 damping model differs between layers, you will need to add several Mechanical Damping 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 Mechanical Damping 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 Mechanical Damping node are described in the documentation for Mechanical Damping 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 damping 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>Mechanical Damping
Ribbon
Physics tab with Piezoelectric Material node selected in the model tree:
Attributes>Mechanical Damping