Creo Simulate > Creo Simulate > Modeling Structure and Thermal Problems > Connections > Gaps > About Gaps (FEM Mode)
  
About Gaps (FEM Mode)
A gap is a nonlinear element, used to model connection between points, edges and curves, or surfaces in your model by connecting two nodes in separated geometries.
Use gaps to represent a nonlinear flexible and friction link that can resist either compression or tension. Depending on the FEA solver, a gap can have friction or flexible characteristics. To learn how the FEA solvers treat gaps, see ANSYS and MSC/NASTRAN.
To create a gap, click Refine Model > Gap to open the Gap Definition dialog box.
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