Interface TYPE16 will enable to define contact conditions between a group of nodes (secondary)
and a curve surface of quadratic elements (main part) as shown in Figure 1 for a symmetric contact.
The main part may be made of 16-node thick shells or 20 node-bricks. The Lagrange
Multiplier Method (LMM) is used to apply the contact conditions. By the way that the
LMM is used, no gap is necessary to be applied. Some applications of this interface
are sliding contacts without gaps as in gear box modelling. Figure 1. Node to Curved Surface Contact in Interface TYPE16
