Interface TYPE6 is used to simulate contact between two rigid bodies.
This interface is similar to interface TYPE3, except for the stiffness. The relationship between
the contact force and the penetration is provided by a user-defined function. This
interface is used particularly in vehicle occupant simulations, for example: knee
bolsters. The main limitation of this interface is that surface 1 must be part of one
rigid body, and also for surface 2. Moreover, both surfaces must be oriented so that
normals are facing each others.
The stiffness used corresponds to the curve Force versus Penetration input by you. The
instantaneous interface stiffness is the slope of the input curve at the given
penetration; therefore, the time step can be affected since the interface stiffness is
used to compute a stable time step:(1)
Where,
The min (Mass of the first rigid body and Mass of the second rigid
body)
