Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Development of Al Crash Box for High Crashworthiness Enhancement

고충돌에너지 흡수용 알루미늄 크래쉬박스 개발

  • 유정수 ((주)성우하이텍 기술연구소) ;
  • 김석봉 (KAIST 기계항공시스템학부) ;
  • 이문용 ((주)성우하이텍 기술연구소) ;
  • 허훈 (KAIST 기계항공시스템학부)
  • Published : 2008.06.01
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Abstract

Crash box is one of the most important automotive parts for crash energy absorption and is equipped at the front end of the front side member. The specific characteristics of aluminum alloys offer the possibility to design cost-effective lightweight structures with high stiffness and excellent crash energy absorption potential. This study deals with crashworthiness of aluminum crash box for an auto-body with the various types of cross section. For aluminum alloys, A17003-T7 and A17003-T5, the dynamic tensile test was carried out to apply for crash analysis at the range of strain from 0.003/sec to 200/sec. The crash analysis and the crash test were carried out for three cross sections of rectangle, hexagon and octagon. The analysis results show that the octagon cross section shape with A17003-T5 has higher crashworthiness than other cross section shapes. The effect of rib shapes in the cross section is important factor in crash analysis. Finally, new configuration of crash box with high crash energy absorption was suggested.

Keywords

References

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  1. Crash Performance of a Straight Member for Various Section Shapes and Local Reinforcement vol.21, pp.5, 2013, https://doi.org/10.7467/KSAE.2013.21.5.097
  2. Low Speed Crash Behaviour of Aluminium Bumper System W.R.T. Design Variables vol.25, pp.1, 2017, https://doi.org/10.7467/KSAE.2017.25.1.011
  3. Impact Performance of a Crash Member Filled with Aluminum Foam vol.20, pp.8, 2011, https://doi.org/10.5228/KSTP.2011.20.8.555