Modeling welds is difficult to do, and realistically you're not going to be able to directly do this in SolidWorks Simulation. There's a couple reasons for this:
- Welds involve metals that have gone through significant phase changes. As such, their material properties aren't going to match with the neighboring structure.
- The geometric nature of the weld is hard to capture accurately, and minute defects in the weld or welds that don't have full penetration require fracture mechanics to be taken into consideration.
- If, in the FEA model, the area of the weld has two different element types present (beam-solid connection, beam-shell connection, shell-solid connection) then the results are going to be inherently inaccurate. This is due to how the software "links" two different types of elements together.
The most realistic way to handle welds in FEA is to calculate the reaction loads at the weld and compare that against design standards. Here is a good reference for you to start with.
I dont need to actally test the strenght of the welds i only need to see the forces that the support would cause on the raised weld pads. we are assuming in our design that the welds will hold due to them not being what we are trying to actually test. I only need to find a way to be able to make simulation think that the two parts are attached.
remove the welds
replace with contacts between the beams and the shells/solids
start with few parts at a time, i suggest starting with a fixed restraint at the bottom, a simple gravity load, get the first few parts working, then add more...etc. you will learn a lot and if you run into a problem, you will know what you changed.
i use the exclude command vs suppression or deleting the bodies