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1. In order to constrain the bolt screwed into a hole, set a bolt connector or a coincidence mate on a bottom face of your screwed part.
2. Apply the torque under the cuts for instrument, same as if they are screwed by the screwer.
3.If you want to simulate a real tightening, first use Motion with torque, determine the reaction force on a cap, then run a transient structure analysis in Cosmos.
4. Refer to help on contact sets
5. Use Von Mises stress plot and optimisation on stress and strain.
Thank you very much for your reply.
It will be greatly appreciated if you could post a example here with CW contraint defined so that I can better understand your solution 1 and 2.
Please help...Any clue will do...