The Piezoelectric Material node defines the piezoelectric material properties either in stress-charge form using the elasticity matrix and the coupling matrix, or in strain-charge form using the compliance matrix and the coupling matrix. It is normally used together with a
Piezoelectric Effect multiphysics coupling node and a corresponding
Charge Conservation, Piezoelectric node in the
Electrostatics interface. This node is added by default to the
Solid Mechanics interface when adding a
Piezoelectric Devices interface.
By adding the following subnodes to the Piezoelectric Material node you can incorporate many other effects:
Select a Constitutive relation —
Stress-charge form or
Strain-charge form. For each of the following, the default uses values
From material. For
User defined enter other values in the matrix or field as needed.
If any material in the model has a temperature dependent mass density, and From material is selected, the
Volume reference temperature list will appear in the
Model Input section. As a default, the value of
Tref is obtained from a
Common model input. You can also select
User defined to enter a value or expression for the reference temperature locally.
When using Common model input, you can see or modify the value of the volume reference temperature by clicking the
Go To Source button (
). This will move you to the
Common Model Inputs node under
Global Definitions in the Model Builder. The default value is room temperature;
293.15 K.
If you want to create a model input value which is local to your current selection, click the Create Model Input button
. This will create a new
Model Input node under
Definitions in the current component, having the same selection as in the current node.
