Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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A Study on Improving Fatigue Life for Composite Cylinder with Seamless Integrated Liner

이음매 없는 일체형 라이너를 갖는 복합재 압력용기의 피로수명 향상에 대한 연구

  • 김효준 (한국기계연구원 부설 재료연구소)
  • Received : 2013.11.11
  • Accepted : 2013.12.19
  • Published : 2013.12.31
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Abstract

Composite cylinder is used by hydrogen fuel cell vehicles and natural gas vehicles because of high specific modulus, specific strength and fatigue resistance. composite cylinder has a seamless integrated liner and it is fully overwrapped with structural fibers of high strength carbon fibers in an epoxy matrix. In this study, filament winding pattern and autofrettage pressure design technique are presented considering structural weakness of knuckle and compressive residual stress. Presented methodology is verified by pressure cycling test of composite cylinders.

복합재 압력용기는 높은 비강성과 비강도 그리고 내피로성으로 수소연료전지자동차와 천연가스자동차에 사용된다. 이음매가 없는 일체형 라이너를 갖는 복합재 압력용기는 고강도 탄소섬유와 에폭시 레진으로 라이너 전체를 감싼다. 본 연구에서는 구조적으로 취약한 너클 부위와 압축잔류응력을 고려하여 필라멘트 와인딩 패턴과 자긴압력 설계 기법을 제시하였다. 복합재 압력용기 시제품에 대한 압력반복시험을 통해 제안된 방법을 검증한다.

Keywords

References

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