I have gone through the model and the setup of the study, You have not given any contacts between the plate.
First, make a fillet bread which joins two plates, then give bonded contacts to plate and the fillet bread.
Then it will give you perfect answer.
Hope this helps.
Micheal Johnson S
Thank you for the quick answer.
I apologize for not being clear in the text above, but the main goal of the study is to use the Edge weld connector for the fillet-lap. I found the approach in the link but have not been able to recreate this study.