Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Evaluation of Cryogenic Performance of Adhesives Using Composite-Aluminum Double Lap Joints

복합재-알루미늄 양면겹치기 조인트를 이용한 접착제의 극저온 물성 평가

  • 강상국 (한국과학기술원 기계공학과 항공우주공학전공) ;
  • 김명곤 (한국과학기술원 기계공학과 항공우주공학전공) ;
  • 공철원 (한국항공우주연구원 구조그룹) ;
  • 김천곤 (한국과학기술원 기계공학과 항공우주공학전공)
  • Published : 2006.08.01
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Abstract

In the development of a cryogenic propellant tank, the proper selection of adhesives to bond composite and metal liner is important for the safety of operation. In this study, 3 types of adhesives were tested for the ability to bond CFRP composites developed for cryogenic use and aluminum alloy (Al 6061-T6) for lining the tank using double-lap joint specimens. The double-lap joint specimens were tested inside an environmental chamber at room temperature and cryogenic temperature ($-150^{\circ}C$) respectively to compare the bond strength of each adhesive and fracture characteristics. The material properties with temperature of component materials of double-lap joints were measured. In addition, ABAQUS was used for the purpose of analyzing the experimental results.

극저온 추진제 탱크를 개발하는 과정에서 복합재와 알루미늄 라이너를 접합하기 위한 접착제의 선택은 탱크의 안전성과도 직결된 매우 중요한 문제이다. 따라서 적합한 극저온용 접착제를 선택하기 위해 3종류의 접착필름이 선정되었으며 극저온용으로 개발된 탄소섬유/에폭시와 라이너 재료로 사용되는 알루미늄으로 구성된 양면 겹치기 조인트 시편을 제작하였다. 제작된 시편을 극저온 환경챔버를 사용하여 상온과 $-150^{\circ}C$에서 인장실험을 수행하여 각 접착제의 접착강도를 비교하였으며 파손 특성을 분석하였다. 또한 양면 겹치기 조인트 시편의 각 구성재료의 온도에 따른 기계적 물성변화를 측정하였으며 이를 이용하여 ABAQUS를 통한 유한요소해석을 수행하여 양면 겹치기 조인트 시편의 인장시험결과를 분석하였다.

Keywords

References

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