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Connect offset Surfaces

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Hello everyone,


I'm struggling to properly connect offset surfaces. I've separated the solid into components of different thicknesses, extracted the midsurfaces and connected the elements with rigids (see attached picture).

FE-Analysis shows different results compared to a solid model and stress jumps at the connection points.


Can anyone suggest me a better idea, how to connect these surfaces?




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thank your for the tip, unfortunately this delivers the same results after trying it out.

I think the problem is, that rigids insert too much stiffness into the model.

I've tried out different approaches and came to the conclusion, that using several rbe3 elements distributed symmetricaly at the connection points deliver the best results for my problem. This is not perfect, but good enough for my issue.

The model is a bit stiffer than the solid model. The deviaton value for displacement is 2% and for the vM-stress only 0,03%.

Maybe this can help someone who has the same problem.

Nevertheless, thanks for your help!

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