An Extended Surface To Surface Contact generates a force between one surface and the other surface.
•Two surfaces must belong to two different bodies.
•The contact force can be not only linear or exponential but also nonlinear spline characteristics to the contact penetration and its velocity.
•The base surface or action surface can be approximated as multi triangular patches with the PATCH option as shown in Figure 1.
•The base surface or action surface can be approximated as a parameterized surface with the Surface option.
Figure 1 Approximated action and base contact surfaces
Figure 2 ESur-Sur icon of the Contact group in the Professional tab