• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.10
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• pp.1155-1162
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• 2012

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.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.844-846
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• 2011

충돌에서의 차체 손상과 충돌 성능 강화를 위하여 최근 크래쉬 영역의 개념이 설계개념에 도입되고 있다. 대표적인 예가 범퍼와 차체사이의 크래쉬 박스로 저속충돌시 충격에너지를 흡수하여 범퍼이후 차체에 에너지를 저감시켜 차량의 안전성 및 수리비 저감 등에 있어서도 매우 효과적인 역할을 하는 부품으로 이에 대한 개발을 위해 많은 연구들이 진행되고 있다. 본 논문에서는 충돌에너지 흡수성능이 우수한 크래쉬박스에 알루미늄 폼을 적용하였을 때 충돌에너지 흡수 및 거동에 대하여 충돌해석을 수행하였다.

• Journal of the Korea Convergence Society
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• v.2 no.3
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• pp.1-6
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• 2011

Aluminum foam is one of the representative light-weight materials. In this study we analyzed the mechanical properties of the aluminum foam structures. Aluminum materials with pores have novel mechanical characteristics such as flame retardancy, damping, and energy absorption which are superior to those of polymer foam. Furthermore its reusable properties draw considerable interests. General properties, energy and acoustic absorption will be investigated and future research issues such as binding techniques of foam materials with other structures will be discussed through foam application examples.

• Transactions of Materials Processing
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• v.17 no.3
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• pp.182-188
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• 2008

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.