Creep
Use the Creep subnode to define the creep properties of a Linear Elastic Material.
The Nonlinear Structural Materials Module is required for this feature. For details, see https://www.comsol.com/products/specifications/.
Shell Properties
Select the layer or layers for which this creep model is to be used.
Table 6-8: Layer Selections; Creep
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 creep model differs between layers, you will need to add several Creep nodes with different layer selections. If the model is the same, and only the material data values differ, you can use a single 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 Creep nodes being active on the boundary, then there will be two creep strain contributions.
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All other settings for the Creep node are described in the documentation for Creep 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 provide material parameters 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>Linear Elastic Material>Creep
Ribbon
Physics tab with Linear Elastic Material node selected in the model tree:
Attributes>Creep