Hi Greg,
Thanks for your reply. I am relatively new to CREO so I had to quickly search this up but when you say ‘contact interface’ do you mean just defining the constraints of the parts prior to assembly? Would doing this yield a different result from adding the part into the whole assembly and constraining from there? (Which is what I have done)
In terms of stresses, I just need this crane to deform as it would in real life. I need to know the max stress anywhere in the assembly is less then 350MPa. At the moment, because the rollers are passing though the big upright, it is giving a much bigger deflection and resulting in ridiculous stresses at the top hub, (as if it was just the boom arm without any rollers or support arms).
So to answer your question, another assumption could be sufficient, as long as it would give me something close to the real results. I have tried ‘fixing’ the rollers in space where they are, this drastically cuts back the stresses and deflection however as the upright bends it still comes through the rollers, not as much though, but in doing so still gives a larger deflection then it should. If I could somehow ‘fix’ that surface region of the upright, that could work however I have not had any luck with creating a surface region on a cylinder…I have only been successful on flat objects.
Thanks again