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A Study on the Strength Safety of a Composite Hydrogen Fuel Tank for a Vehicle

차량용 복합소재 수소연료탱크의 강도안전성에 관한 연구

  • Kim, Chung-Kyun (Research Center for Tribology, Mechatronics and Energy Technology Hongik University) ;
  • Kim, Do-Hyun (Research Center for Tribology, Mechatronics and Energy Technology Hongik University)
  • 김청균 (홍익대학교 트리보.메카.에너지기술 연구센터) ;
  • 김도현 (홍익대학교 트리보.메카.에너지기술 연구센터)
  • Received : 2011.07.03
  • Accepted : 2011.10.28
  • Published : 2011.10.30

Abstract

This paper presents the strength safety of a hydrogen gas composite fuel tank, which is analyzed using a FEM based on the criterion of US DOT-CFFC and Korean Standard. A hydrogen gas composite tank in which is fabricated by an aluminum liner of 6061-T6 material and carbon fiber wound composite layers of T800-24K is charged with a filling pressure of 70MPa and a gas storage capacity of 130 liter. The FEM results indicated that von Mises stress, 255.2MPa of an aluminum liner inner tank is low compared with that of 95% yield strength, 272MPa. And a carbon fiber stress ratio of a composite fuel tank is 3.11 in hoop direction and 3.04 in helical direction. These data indicate that a carbon fiber gas tank is safe in comparison to that of a recommended criterion of 2.4 stress ratio. Thus, the proposed composite tank with 130 liter capacity and 70MPa filling pressure is usable in strength safety.

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