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NX Nastran Bolt Preload

NX Nastran Bolt Preload

NX Nastran Bolt Preload

(OP)
Hello,

I am performing a non linear sliding contact using a clevis pin and stud with an initial gap of .15mm.   I am having a hard time converging with such a large gap.  I can get the model to converge and run fine with a gap of .05mm or smaller.  After countless trial and errors it appears that with the larger gap the clamping pressure from the bolt preload may be happening to fast.  I have tried touse hte boltstp parameter and changed from 1 to 5 with no success.  In fact, I can not even get this parameter to wokr with the model that does converge.  

Doe sanyone have expereince with this parameter and am I missing something?

Thanks Ahead of Time!

 

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