Use the Activation subnode to activate or deactivate parts of a domain according to an
Activation expression that you define. The
Activation subnode uses a scale factor that reduces the elastic stiffness and density of the material, to emulate that material is not present. When the
Activation expression is satisfied, the material is activated in a state of zero stress.
The Activation subnode can be used in combination with
Linear Elastic Material, and in the Wire interface with
Elastic Wire.
Enter the Activation expression. This is the expression that will determine whether material is active or inactive.
Enter the Activation scale factor. The default value is 10
−5.
The Activation subnode is only available with some COMSOL products (see
https://www.comsol.com/products/specifications/)
Physics tab with Linear Elastic Material or
Elastic Wire node selected in the model tree: