Orientation of contact “pushout” force from master surface.
OPENGAP – The contact interface is assumed open.
OVERLAP – Slave and master bodies overlap.
NORM – Contact force is oriented along the vector normal to the master surface.
REVNORM – Contact force is oriented opposite to the default vector normal to the master surface.
Default = OPENGAP (OPENGAP, OVERLAP, NORM or REVNORM). See comment 6.
b)
OVERLAP assumes the reverse, namely that the slave and master bodies are already overlapping and the contact condition should push them apart (this is useful for modeling fitted bolts etc.).