Optimization of a B-pillar with tailored properties under impact loading

Abstract

Within the study's scope, the impact performance of a boron steel B-pillar with three different hardness values and six different B-pillar designs with tailored properties was compared in crashworthiness. Impact simulation results were compared in terms of specific energy absorption and peak crushing force values of the B-pillar. “Upper part T500 and lower part O25 heat treated B-pillar” gave the highest specific energy absorption. “Upper part O25 and lower part T25 heat treated B-pillar” resulted in the lowest peak crushing force and gave the second highest specific energy absorption. This pillar was used in optimization studies to maximize specific energy absorption and minimize peak crushing force. The optimal B-pillar improved the impact performance of the structure. This B-pillar can be used on vehicles to improve crash performance.