Tube Material Grade
Boron was chosen to increase material strength and save weight. Boron can be heat treated to achieve its material properties through several different methods. In this analysis, it was assumed to be processed similar to a stamping process where the hydroformed tube would be heated and then cooled in a holding fixture.

Tube Gage Optimization
Similar to the front end structure,
the b-plr. and roof rail
tubes were segmented
and evaluated for
optimum gage. Both
the roof rail and b-plr.
tubes were split in
3 areas.