차체 경량화를 위한 TRB 핫스탬핑 센터필라 개발

The B-pillar with TRB (Tailor Rolled Blank) is developed for weight reduction of car body. The reinforcements in the typical B PLR can be replaced by one TRB part which has continuous thickness changes. TRB thickness profile is modified for satisfying IIHS side impact test. The free fall tests have been carried out. The results show that the new B PLR with TRB is 15% lighter than typical structure and has equivalent crashworthiness.