Viscoelasticity
Use the Viscoelasticity subnode to add viscous stress contributions to an elastic material model. Viscoelasticity can be added to Linear Elastic Material, Layered Linear Elastic Material, Nonlinear Elastic Material and Hyperelastic Material.
If the Composite Materials Module analysis is available, the viscoelasticity model can be applied to arbitrary layers in a multilayered membrane.
See also the discussion in Layered and Nonlayered Membranes.
Shell Properties
This section is present only when the Viscoelasticity node is used under Layered Linear Elastic Material.
Select the layer or layers for which this viscoelastic model is to be used.
Table 7-2: Layer Selections; Viscoelasticity
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.
If the viscoelastic model differs between layers, you will need to add several Viscoelasticity nodes with different layer selections.
If the same layer is selected in two Viscoelasticity nodes being active on the boundary, then there will be two viscoelastic contributions.
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All other settings for the Viscoelasticity node are described in the documentation for Viscoelasticity 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
Membrane>Linear Elastic Material>Viscoelasticity
Membrane>Layered Linear Elastic Material>Viscoelasticity
Membrane>Nonlinear Elastic Material>Viscoelasticity
Membrane>Hyperelastic Material>Viscoelasticity
Ribbon
Physics tab with Linear Elastic Material, Layered Linear Elastic Material, Nonlinear Elastic Material, or Hyperelastic Material node selected in the model tree:
Attributes>Viscoelasticity