Strength of Pipe Type Door Impact Beam with Changed Bracket Mounting Method and TRP Application

Abstract : Door impact beam plays a key role in minimizing the occupant injury within the side impacted vehicle through preventing intrusion of the impacting vehicle. Steel pipe type door impact beam has been widely adopted since it has simple structure and the overall strength is easily determined according to the pipe size. The brackets welded at pipe ends connect the door impact beam and the door panels by spot welds. In this study, first, the effect of pipe thickness, bracket thickness and door mounting stiffness was respectively analyzed. Next, application of the tailor rolled pipe was examined and several alterations of the bracket mounting method were considered. Application of tailor rolled pipes with superior bracket mounting method showed remarkable strength enhancement and weight reduction possibility in comparison with the current door impact beam. Key words : Side impact(측면 충돌), Steel pipe type door impact beam(강관형 도어 임팩트 빔), Bracket mounting method(브라켓 마운팅 방법), TRP(테일러 롤 강관), Mounting spring stiffness(마운팅 스프링 강성)