Spring Foundation
Use the Spring Foundation node to apply elastic and damping boundary conditions on the material layers (on boundaries, edges, and points) of a layered shell.
By adding the Predeformation subnode, you can prescribe that the spring force is zero at a nonzero spring extension.
Layer Selection
Select the material layers to which the spring contribution is to be applied.
[
Table 6-26: Layer Selections; Spring Foundation
Selection
All Layered Materials
Layered Material Link
Selection of Individual Layers
Boundary
Default
Selectable
When a single layered material definition is selected
Edge
Default
Selectable
When a single layered material definition is selected.
Point
Default
Selectable
When a single layered material definition is selected.
For a general description of this section, see The Layer Selection Section.
All other settings for the Spring Foundation node are described in the documentation for Spring Foundation in the Solid Mechanics interface.
Location in User Interface
Context Menus
 Layered Shell>Mass, Spring, and Damper>Spring Foundation (Boundary, Edge)
Layered Shell>Points>Spring Foundation
Ribbon
Physics tab with Layered Shell selected:
Boundaries>Mass, Spring, and Damper>Spring Foundation
Edges>Mass, Spring, and Damper>Spring Foundation
Points>Layered Shell>Spring Foundation