I'm trying to simulate a welded flange at a pipe and the flange is bolted to the other with pre tork (140nm). The problem that I'm facing is that the stresses are too high for this pre tork, but the 140nm is the pre load recommended for this size of flange.
I uploaded the model with my consideration, any help or comment is welcome !
Yes James, I used bolted connections.
This simulation was just to test if the bolted connections are reliable. I changed the simulation to non linear and now worked fine ! the problem just happens in linear solution. For the non linear simulation only 2,92% of the geometric volume passed 153Mpa.
Hi Emilio,
The files that you uploaded do not include the parts; it just the assembly. Hence, I cannot open the full model for further investigation.
Cheers,
Siavash
Are you using bolted connections? If so, did you read the warning?
A logical alternative is to split the surface on each side (size of head/washer) and apply the hand calculated clamp force for the bolt used.