#116: Interpretation of the GAP contact status in Nastran f06 file?

#116: Interpretation of the GAP contact status in Nastran f06 file?

Gap contact status values are

1) Open = gap open (with or without friction)
2) Slide = gap closed in the absence of friction
3) Stick = gap closed in the presence of friction and (Fy**2 + Fz**2) <= (MUs * Fx)**2 4) Slip = gap closed in the presence of friction and (Fy**2 + Fz**2) > (MUk * Fx)**2

where Fx is the normal contact force (compression is positive);
Fy and Fz are the shear forces;
MUs is the static coefficient of friction;
MUk is the kinematic coefficient of friction.