Thin Elastic Layer
Use the thin Elastic Layer node to apply elastic and damping boundary conditions on the interior edges of a layered shell. Physically, this means that the spring condition is added at the interface between to layers located in adjacent boundaries.
By adding the Predeformation subnode, you can prescribe that the spring force is zero at a nonzero spring extension.
Shell Properties
Select the material layers to which the spring condition is to be applied.
When Use all layers is not selected.
All other settings for the Thin Elastic Layer node are described in the documentation for Thin Elastic Layer in the Solid Mechanics interface.
Location in User Interface
Context Menus
Ribbon
Physics tab with Layered Shell selected: