Hi, I have the structure below which, under solicitations, is bending a bit towards the direction of the red arrows.
Pipes are 40mm diameter.
I was thinking about moulding two half pipes composed mostly of several layers of unidirectional carbon tape and then glue with mma the half pipe to the existing pipes (along the orange lines).
The layup I am thinking is 10x layers of 50mm wide 650gm2 carbon unidirectional tape, alternated with some 50mm wide plain carbon tape.

What do you think about the idea and the layup schedule?

Also, maybe adding a 2 mm pvc core in between would help? I am just worried that the shear force could cause the two carbon frames to slip on the pvc core, so maybe a not cored layup would be better?

Hi, I should have specified that it is not stainless steel unfortunately but aluminum, this is one of the reasons it is bending and also why I thought about a thick carbon shell on the existing pipes.
Dismounting the structure to weld other aluminum is almost undoable because all of the wirings and structures attached to jt