Type III 고압수소저장용기의 설계 안전성 연구

• Published in: 한국안전학회지 Vol. 34; no. 5; pp. 7 - 14
• Main Authors: 박우림, Woo Rim Park, 전상구, Sang Koo Jeon, 김송미, Song Mi Kim, 권오헌, Oh Heon Kwon
• Format: Journal Article
• Language: Korean
• Published: 한국안전학회 31.10.2019
• Subjects: carbon fiber composite; fatigue analysis; finite element analysis; hydrogen storage vessel; optimization analysis; ply modeling method; 안전공학; fatigue analysis; optimization analysis; hydrogen storage vessel; carbon fiber composite; finite element analysis; ply modeling method
• ISSN: 1738-3803; 2383-9953
• DOI: 10.14346/JKOSOS.2019.34.5.7

The type III vessel, which is used to store high-pressure hydrogen gas, is made by wrapping the vessel’s liner with carbon fiber composite materials for strength performance and lightening. The liner seals the internal gas and the composite resists the internal pressure. The properties of the fiber composite material depends on the angle and thickness of the fiber. Thus, engineers should consider these various design variables. However, it significantly increases the design cost due to the trial and error under designing based on experience or experiments. And, for aluminum liners, fatigue loads due to using and charging could give a huge impact on the performance of the structure. However, fatigue failure does not necessarily occur in the position under the highest load in use. Therefore, for hydrogen storage vessel, fatigue evaluation according to design patterns is essential because stress distribution varies depend on composite layer patterns. This study performed an optimization analysis and evaluated a high-pressure hydrogen storage vessel to minimize these trial and error and improve the reliability of the structure, while simultaneously conducting fatigue assessment of all patterns derived from the optimization analysis process. The results of this study are thought to be useful in the strength improvement and life design of composite reinforced high-pressure storage vessels.