한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제41권12호
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  • Pages.967-974
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  • 2013
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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요철 형상의 스테인레스강 Z-핀으로 보강된 복합재 접합 구조물의 피로강도

Fatigue Strength of Composite Joint Structures Reinforced by Jagged Shaped Stainless Steel Z-pins

  • Choi, Ik-Hyeon (Advanced Materials & Structures Research Team of Korea Aerospace Research institute) ;
  • Lim, Cheol-Ho (Vice President of Korea Aerospace Research institute)
  • 투고 : 2013.10.21
  • 심사 : 2013.11.27
  • 발행 : 2013.12.01
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초록

저자는 최근 산업체 생산 현장에서 Z-피닝 복합재 구조물을 간편하게 제작할 수 있는 Z-피닝 패치 개념을 제안하였고, 이를 적용하여 복합재 단일-겹침 전단 접합시편을 제작하였으며, 정적시험을 통하여 54~68%의 접합강도의 향상을 발표하였다. 본 연구는 상기 연구의 후속으로서, 반복하중에 대한 접합강도의 향상을 측정하기 위하여 피로시험을 수행하였다. 사용된 Z-핀은 스테인레스강 핀이며, 복합재료와의 결합력을 증가시키기 위하여 표면을 요철 형상으로 가공하였으며, 화학적으로 부식시켰다. 반복하중 조건에서 접합강도는 약 98~125% 향상되었다.

Recently the authors had proposed the z-pinning patch concept to simply manufacture z-pinned composite structures at industrial production site and manufactured composite single-lap shear joint specimens using the concept. Through static tensile test on the specimens they had obtained 54~68% improvement of the joint strength. As a sequential study of it, in this study, fatigue test has performed to measure an improvement of joint strength under cyclic loading. The z-pin's material is stainless steel and its surface was specially machined into zagged shapes and chemically corroded to increase the connection force with composite materials. Approximately 98~125% improvement of the joint strength under cyclic loading was obtained.

키워드

참고문헌

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