Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Experimental Study on the Structural Integrity of Type IV Hydrogen Pressure Vessels Experienced Impact Loadings

충격 하중 조건에서의 Type IV 수소 압력용기 구조건전성 분석

  • Received : 2016.04.01
  • Accepted : 2016.04.28
  • Published : 2016.04.30
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Abstract

In this paper, finite element analysis and real time monitoring experimental work using FBG sensor were carried out for analyzing structural integrity of a Type IV hydrogen pressure vessel under impact loading condition. By using finite element analysis with the ply based modeling technique, sensor insertion points and pressure condition were suggested. Tensile test with an angle ply specimen was conducted for getting the reliability of FBG sensor insertion method. After fabricating the vessel, total five times pressurization fatigue tests were conducted (Non-impact pressurization: 1, After impact pressurization: 4). Experimental results revealed that filling cycle time was gradually increased and filling gradient was decreased when the vessel experienced impact.

본 연구에서는 Type IV 수소 압력용기 시제품의 충격하중 조건에 따른 구조 건전성을 분석하고자 유한요소해석과 FBG 센서 삽입을 통한 실시간 모니터링 실험을 수행하여 결과를 분석하였다. 플라이 모델링 기법을 활용한 유한요소해석을 통해 FBG 센서를 삽입할 수소 압력용기의 취약부 선정 및 가압 조건을 제시하였으며, 실험을 진행할 기초 정보를 확보하였다. 실제 용기제작에 앞서 시편 실험을 통해 FBG 센서의 삽입방식 신뢰성을 확보하였으며, 이후 해당 결과를 활용하여 필라멘트 와인딩 공정에 적용하였다. 비충격 가압 피로실험과 총 4회의 충격 피로실험을 수행하였다. 실험결과 비충격 가압 피로실험에서는 해석과 동일한 거동을 보였으며, 4회의 충격 피로실험에서는 용기의 충전 시간이 점진적으로 증가하고 충전률은 감소하는 것을 확인하였다.

Keywords

References

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