Additional Creep
Use the Additional Creep subnode to define additional contributions to the creep model defined by the parent Creep node, such as primary or tertiary creep behavior. A Creep node can have any number of Additional Creep subnodes with different settings to model advanced creep mechanisms.
The Nonlinear Structural Materials Module is required for this feature. For details, see https://www.comsol.com/products/specifications/.
If the Composite Materials Module is available, the creep model can be applied to arbitrary layers in a multilayered shell.
Shell Properties
Select the layer or layers for which this creep model is to be used.
When Use all layers is not selected.
When the creep model differs between layers, you will need to add several Additional Creep nodes with different layer selections. If the model is the same, and only the material data values differ, you can use a single Additional Creep node where From material is used to define the values. The data for each layer is then received from global Layered Material nodes.
If the same layer is selected in two Additional Creep nodes being active on the boundary, then there will be two creep strain contributions
All other settings for the Additional Creep node are described in the documentation for Additional Creep in the Solid Mechanics interface.
Location in User Interface
Context Menus
Ribbon
Physics tab with Creep node selected in the model tree: