Experimental results from three-point bending and axial compression tests of common automotive roof elements are presented in this paper. Modifications of these components were also tested to evaluate the effect of structural reinforcements and void filling. The strength of typical roof structural elements can be significantly improved in both three-point bending and in axial compression through the use of metal reinforcements and void filling. Both void filling and structural reinforcements demonstrated structural advantages in peak load capacities and energy absorption properties. Optimization of the proper void filling density and amount of metal reinforcement is required on an individual design basis to maximize the effectiveness. Both techniques demonstrated an ability to improve upon existing automotive components and repair some of their inherent weaknesses.
Abstract