External Strain
The External Strain subnode allows you to provide inelastic strain contributions to the Linear Elastic Material or Hyperelastic Material on a variety of formats.
Shell Properties
Select the layer or layers for which this strain contribution is to be added.
Table 6-18: Layer Selections; External Strain.
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.
Coordinate System Selection
The Coordinate system list contains all applicable coordinate systems in the model, including the Boundary system and the Layer local system. The Global coordinate system is selected by default. External strains are specified along the axes of the selected coordinate system.
If the external strain input type differs between layers, you will need to add several External Strain nodes with different layer selections.
If the same layer is selected in two External Strain nodes being active on the same boundary, the contributions will be added.
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See Defining a Layer Local System in the Composite Materials Modeling chapter.
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All other settings are described in the documentation for External Strain 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 describe strain values 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 > External Strain
Layered Shell > Hyperelastic Material > External Strain
Ribbon
Physics tab with Linear Elastic Material or Hyperelastic Material node selected in the model builder tree:
Attributes > External Strain