NX Nastran Non Linear Contact Penetration

[thecadguy]

Hello,

I am doing a clamp pinch around a pin analysis and and iterested in pull out force once the clamp pressure has been applied to the pin. After much trial and error I am starting to get the model to work correctly but the results are varying depending on which inipene value/tzpene combination. My gap evaluation is between .03mm and .15mm. I can not get the model to converge with eliminate so I am using the gap overridden option and setting the gap value. I get decent results at the lower gap value of .03mm but can not get the model to converge when I go past a gap value of .05. I tried increasing the time tzpene with no luck.

Does the gap overridden option only set nodes that are penetrating to the gap value or all the nodes? If it is just adjusting the nodes that start off with initial penetration, and leaving the other nodes allow, I could probably accept the results of a overidden lower gap value when the geometry gap is actually larger (.15mm). If it adjusts all the nodes than I think the anwers are incorrect.

This should not be that hard and was hoping someone has some other suggestions?

Thanks,

thecadguy

 

[thecadguy]

Any Help?

 

[ZeroExperience]

Switch to MSC Nastran SOL 400 or Marc for easy contact analysis that actually converges.