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Von mises for pure shear problems should be factored down by the square root of three or 1.73 or so - see attahced. Check the help file - it is in there.
Good luck - there is an older thread where most of this is covered.
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Thanks for the info. Your formula from Roarke's is essentially the same I was using from Marks' and Machinery's. So that tells me I was at least on the right path. Unfortunately, it can be some time between applications so things get a little rusty from time to time. I had to knock some dust off Marks'.
I am a little troubled, however, that you have know to reduce the Cosmos results by a factor of root three. I guess that's why it's called analytical software and not intuitive software. I ran across a good article that pretty much hit the nail on the head.
I tried to find an old thread to read before I posted this one with little success. I'll have to go back and look again, perhaps for shear instead of torsion.
On a side note: Do you do PE work for in house only, or are you available to cert designs from other companies? We do work for facilities in CA from time to time and are always looking for a CA based PE to cert our stuff.
Probably best take the furthering of this discussion off line.Mmy email is email@example.com - drop me a note.