First rule of shells in SWX Sim: make your own surfaces and delete the solid bodies. Then you do not need to know the secret decoder ring secrets on how you map the solid body attachements to the autoextracted shells. Even if you did know the secrets of the decoder ring it probably wouldn't help in this case. Skipping the auto extraction process means you can attach the bolt connector directly to the shell edge and avoid your issues. I can not recall if bolt connectors are supported with shells or not but if they are this is how to get it done with out errors. SWX should just abandon this whole automatic thing - it is a total cock up invented by people who do not use this stuff ever excpet in a demo for which it looks quite spiffy. They should just auto extract the sufaces, hide the solid bodies and exclude them from the analysis - then you would be forced to pick geometry on the actual shell surfaces that the elements are mapped into. I just do all this manually and it is pretty staight forward and realtively painless but work non the less.
Why are you using bolt connectors? Are you trying to determine the external loads on the bolts, stresses near the bolts in the adherents or are you interested in other areas and just think you shoudl use olt connectors because bolts are used in reality?
Thanks for the reply, Bill. The SW help files state the following:
"You can define bolts through a mixed stack of solids, shells and sheet metal bodies."
So, in theory, I should be able to use a bolt connector with shell elements. I'm using bolt connectors because, among other things, I am interested in the stress regions around the bolt holes.
Thanks for the suggestion to create my own shells. One question: What if I have one part (a sheet metal plate) that, before shelled, has bolt connections referencing edges on opposite sides of the plate? Then, when I shell, only one side of that plate remains, and the bolt connection that referenced the opposite side (the side that is no longer there after shelling) is left without a reference edge. How can I get around that?
I just ran this thing as a solid body and it burned for 12 hours then told me large discplacements were encountered. Agh! I need to understand how to do this with shells in hopes of reducing the processing time (for reference, there were 1.2 million dofs, and I still didn't even have more than a single "element width" across my wall thicknesses.