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Do shell offsets cause shell edge loads to induce moment?

Do shell offsets cause shell edge loads to induce moment?

Do shell offsets cause shell edge loads to induce moment?

(OP)
If I have a shell edge load and choose the "middle" offset for the shells, what sort of differences should I see compared to when I apply the same loads but with an offset of "top" or "bottom"?

I've done a simple test and see a difference of about 6%.

However, I am wondering if this is a coincidence (I ran a simple beam with compression load), because I am applying a shell load on a much more complex model with various offsets and composite material properties and the difference between when I set all shells to the "bottom" and when I offset them so the load is applied to the middle (not the "middle offset" because all the shell elements have different thicknesses)...the results are vastly different.

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