Viscoplasticity
Use the Viscoplasticity subnode to define the viscoplastic properties of a Layered Linear Elastic Material.
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 viscoplastic model can be applied to arbitrary layers in a multilayered shell.
See also Layered and Nonlayered Shells.
Shell Properties
Select the layer or layers for which this viscoplasticity model is to be used.
Table 5-8: Layer Selections; Viscoplasticity
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 viscoplasticity model differs between layers, you will need to add several Viscoplasticity nodes with different layer selections. If the model is the same, and only the material data values differ, you can use a single Viscoplasticity 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 Viscoplasticity nodes being active on the same boundary, the second definition will override the previous.
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All other settings for the Viscoplasticity node are described in the documentation for Viscoplasticity 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.
Location in User Interface
Context Menus
Shell>Layered Linear Elastic Material>Viscoplasticity
Ribbon
Physics tab with Layered Linear Elastic Material node selected in the model tree:
Attributes>Viscoplasticity