Thin Elastic Layer
Use the thin Elastic Layer node to apply elastic and damping boundary conditions on the interior edges 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
 
For a general description of this section, see The Layer Selection Section.
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
Layered Shell>Mass, Spring, and Damper>Thin Elastic Layer (Edge)
Ribbon
Physics tab with Layered Shell selected:
Edges>Mass, Spring, and Damper>Thin Elastic Layer