Predeformation
Use the Predeformation subnode to specify that the elastic forces in Spring Foundation are nonzero at zero displacement. Thus you can model cases where the unstressed state of the spring is in another configuration than the one described by the geometry.
The value of the predeformation can vary during the simulation, so it should not be interpreted as an initial value.
Spring Predeformation
Based on space dimension, enter the values for the Spring Predeformation u0.
You can assign the load caused by the predeformation to a load group. See Load Cases in the Structural Mechanics Modeling chapter.
Location in User Interface
Context Menus
Shell>Spring Foundation>Predeformation
Plate>Spring Foundation>Predeformation
Ribbon
Physics tab with Spring Foundation or Thin Elastic Layer node selected in the model tree:
Attributes>Predeformation