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

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on Fracture Characteristic of Aluminum Foam by Thickness

두께에 따른 알루미늄 폼의 파괴 특성에 관한 연구

  • Gao, Teng (Dept. of Mechanical Engineering, Graduate School, Kongju University Nat'l Univ.) ;
  • Cho, Jae Ung (Div. of Mechanical and Automotive Engineering, Kongju Nat'l Univ.)
  • 고등 (공주대학교 대학원 기계공학과) ;
  • 조재웅 (공주대학교 기계자동차공학부)
  • Received : 2015.03.29
  • Accepted : 2015.05.07
  • Published : 2015.10.01
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Abstract

Because foam metal has the excellent physical characteristics and mechanical performance, they are applied extensively into a lot of advanced technology areas. The aluminum foam with closed cell is one of the foam metals. It is applied widely into automobile and airplane because of the excellent absorption performance of impact energy. In this study, the mechanical characteristics by thickness was analyzed through the impact experiment of closed-cell aluminum foam, and the simulation analysis was performed for the verification. As the simulation analysis method, a finite-element analysis was carried under the same boundary conditions as the experiment by using ANSYS. By comparing with the results of experiment and simulation, it was thought that the case of thickness of 20mm was the most efficient of among the cases of thicknesses of 10mm, 20mm and 30mm. At the case of thickness of 20mm, the absorption energy by comparing with the specimen thickness is shown to become the most among three models. By using the result of this study, it is thought that it can apply the material necessary to develop the mechanical structure with aluminum foam.

발포금속은 우수한 물리적 특성과 역학적 성능 때문에 많은 첨단기술 분야에 널리 사용되고 있다. 폐쇄형 알루미늄 폼은 발포금속 중에 하나이며, 우수한 충격에너지 흡수하는 성능 때문에 자동차와 항공기에 많이 쓰이고 있다. 본 연구에서는 폐쇄형 알루미늄 폼의 충격 실험을 통해 두께에 따른 기계적 특성을 분석하였으며, 검증으로 시뮬레이션 해석을 하였다. 시뮬레이션 해석 방법으로서는 ANSYS 를 이용하여 실험과 똑 같은 경계조건으로 유한요소해석을 진행하였다. 실험과 해석의 결과들을 비교해보면 10mm, 20mm, 30mm 인 경우에 20mm 인 경우는 제일 효율적인 것으로 사료된다. 20mm 의 경우가 시험편의 두께에 비하여 세가지 모델들의 경우에 있어 충격 에너지의 흡수가 가장 큰 것으로 나타났다. 본 연구의 결과들을 이용하면, 알루미늄 폼으로 된 기계 구조물의 개발에 필요한 자료를 제공할 수 있을 것으로 사료된다.

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References

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