FEA, frame with roll cage

Modeling continues

Now the frame twists 1,7 degrees with the same forces as in the previous picture. There is 70% more stiffness compared to without the roll cage. The diagonal in the roof contributes to 30% of the addition in stiffness. The color in the nose says that it twists much more evenly than before, and the roll cage distributes load even to the trunk area.

There's still a little more tweaking with the frame to get the forces to load more evenly. I also figured out how to add the panels, as I thought the mistake I made was very small...