I have had pretty good success with making a physics based rail simulation,
however one of the problems I am facing is the strength of physical materials and collision meshes.
To elaborate I have a three link chain coupling, rigid meshes connected by physic constraints.
It works as real life, drop the chain over a hook and can pull it around OK.
Couple extra wagons up and the strain on the links obviously increases as you pull the load.
Until such a point that they cannot take the strain and it separates.
I have played around with physical materials, restitution and the like, also the constraint linear and angular strengths, with limited success.
The one thing that does work is if I increase the mass of the links substantially.
This then leaves to other problems, such as
Increase the mass of a link from 12kg(realistic) to say 150 kg and the links are bullet proof.
However as they swing around their mass then rocks a 15,000kg wagon around… Fully sprung and damped
The mass multiplier does not seem to have any effect
Any ideas on how to get the high mass strength without the weight?