Spring Foundation, Interface

Use the node to apply elastic and damping boundary conditions on the interfaces of material layers (on boundaries, edges, and points) of a layered shell. For applying spring conditions on a layer, see Spring Foundation.

By adding the Predeformation subnode, you can prescribe that the spring force is zero at a nonzero spring extension.

Interface Selection

Select the interface or interfaces for which this spring condition is to be added.

Table 6-54: Interface Selections; Spring Foundation, Interface
Selection	Apply To	Selection of Individual Interfaces
Boundary	When added: Exterior interfaces.	When Selected Interfaces is selected. Only exterior interfaces can be selected.
Edge, Point	When added: Top interface.	When Selected Interfaces is selected. Any interface can be selected.

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All other settings for the node are described in the documentation for Spring Foundation in the Solid Mechanics interface.

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For more information about the use of springs, see Springs and Dampers in the Structural Mechanics Modeling chapter.

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For a theoretical background, see Spring Foundation and Thin Elastic Layer in the Structural Mechanics Theory chapter.

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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 activate and deactivate this boundary condition by assigning it to a constraint group. See Load Cases in the Structural Mechanics Modeling chapter.

Location in User Interface

Context Menus

Ribbon

Physics tab with selected: