Hi, I hope someone is still here since I found something new. When I turn on Weak Springs I seem to find where the problem is. It is a newer design of the model but the loadings and overall functions are pretty much the same. The beam seems to have ignored my bonded contact I applied onto the circular surfaces around the bolt holes (one in the middle of the horizontal plate ad one inside the beam)

When I was forced to bond the plain surfaces instead, the beam does move with the plate but then the firctional contact was ignored. I applie them between the faces of rectangular parts under the plate and the vertical square tube. The system completely ignored them and let me penetrate.

The fixed support and loadings are identical as mentioned above, and a newer illustration of the model is attached as below. Does anyone know what to do with it?