Creates RBE2 (Nastran/OptiStruct) or KINCOUP (Abaqus) elements
for the head and CBAR (Nastran/OptiStruct) or B31 (Abaqus) element for
the body.
Restriction: Available in Abaqus, Nastran, and OptiStruct.
The head elements project and connect to the nodes of the adjoining shell elements which
form the hole and also the second row of nodes which form the washer layer. The
connector location can either be on the edge of the hole, center of the hole, midpoint
in between the two holes or on the second row of nodes which form the washer layer. Figure 1.
