Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effect of Bead Shape in Aluminum Crash Box for Effective Impact Energy Absorption Under Low- Velocity Impact Condition

저속충돌조건에서 효과적인 충돌에너지흡수를 위한 알루미늄 크래쉬 박스의 비드형상 효과

  • Lee, Chan-Joo (Dept. of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Lee, Seon-Bong (Faculty of Mechanical and Automotive Engineering, Keimyung Univ.) ;
  • Ko, Dae-Cheol (PNU-Industrial Liaison Innovation Center, Pusan Nat'l Univ.) ;
  • Kim, Byung-Min (Dept. of Mechanical Engineering, Pusan Nat'l Univ.)
  • 이찬주 (부산대학교 기계공학부) ;
  • 이선봉 (계명대학교 기계자동차공학과) ;
  • 고대철 (부산대학교 부품소재산학협력연구소) ;
  • 김병민 (부산대학교 기계공학부)
  • Received : 2012.02.09
  • Accepted : 2012.07.24
  • Published : 2012.10.01
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Abstract

The purpose of this study is to investigate the effects of the bead shape on the crash performance of an aluminum crash box under a low-velocity impact condition. The initial peak load and impact energy absorption of a crash box with three types of bead shapes-edge concave, surface convex, and surface concave type-were studied through an FE analysis and an experiment. In addition, the effects of the bead shapes on the crash performance of the crash box were verified through a low-velocity-impact test with a front side member assembled with an aluminum crash box. The initial peak load of the surface-concave-type crash box was reduced by the bead, and therefore, deformation of the front side member at initial contact could be prevented. Furthermore, there was no deformation of the front side member after the impact test because the crash box with a surface-concave-type bead absorbed all the impact energy.

알루미늄 크래쉬 박스는 저속충돌조건에서 프론트 사이드 멤버를 변형을 방지하기 위한 부품이다. 본 연구에서는 저속충돌조건에서 비드형상이 알루미늄 크래쉬 박스의 충돌성능에 미치는 영향을 분석하였다. Edge concave, surface convex 와 surface concave 타입의 비드형상들에 대한 충돌해석 및 실험을 수행하여 비드가 없는 normal 타입의 알루미늄 크래쉬 박스의 충돌성능과 비교분석하였다. 충돌성능은 저속충돌조건에서 크래쉬 박스의 초기 최대하중 및 충돌에너지 흡수능으로 평가하였다. 이를 검증하기 위해 알루미늄 크래쉬 박스와 결합된 프론트 사이드 멤버에 대해 저속충돌실험 수행하고, 이를 분석하였다. Surface concave 타입의 비드가 삽입된 알루미늄 크래쉬 박스 경우, 프론트 사이드 멤버의 변형을 방지할 수 있음을 확인하였다.

Keywords

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