Ratchet coupling

The ratchet coupling can take tension or compressive force. The force will start to act after a specified time.
The force consists of 3 components, a constant force, a stiffness force and a damping force.
The constant force component (which can be set to zero) acts from t=0.
For a ratchet with compressive force, the damping will only act when the distance is decreasing and for a tension ratchet the damping will only act when the distance is increasing.

It is possible to specify an event of ratchet failure. It will then fail if a specified force is exceeded.
When the element fails, the tension is set to zero.