한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

  • 제16권5호
  • /
  • Pages.13-18
  • /
  • 2017
  • /
  • 1598-6721(pISSN)
  • /
  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
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Type4 복합재 용기의 돔 형상에 따른 파열형태에 관한 연구

A Study on Failure Modes of Type4 Composite Pressure Cylinders according to Shapes of Domes

  • 조성민 (한국가스안전공사 가스안전연구원) ;
  • 김광석 (한국가스안전공사 가스안전연구원) ;
  • 조민식 ((주) 대흥정공) ;
  • 이선규 (한국가스안전공사 가스안전연구원) ;
  • 이승국 (한국가스안전공사 가스안전연구원) ;
  • 류성기 (경상대학교 기계항공학부, 항공연)
  • Cho, Sungmin (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Kim, Kwang Seok (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Cho, Min-sik (DH Precision Industrial co., LTD.) ;
  • Lee, Sun-kyu (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Lee, Seung-kuk (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Lyu, Sung-Ki (School of Mechanical & Aerospace Eng., ReCAPT Gyeongsang National Univ.)
  • 투고 : 2017.06.13
  • 심사 : 2017.06.22
  • 발행 : 2017.10.31
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초록

In this work the augmented safety of Type 4 composite vessel in accordance with uniform-stress design has been demonstrated through a series of burst tests and structural analyses. For this end, three sample vessels were used: (1) designed as guided by the isotensoid dome theory (called iso-dome cylinder); (2) with dome longer compared to uniform-stress design (called prolate cylinder); and (3) with dome wider than uniform-stress design (called oblate cylinder). Structural analyses have been performed using ABAQUS finite element code based on the periodic symmetry to circumferential direction. As a result, the maximum stresses are induced around the bodies of all three cylinders. However, the analyses, with the assumption of possible defect demonstrate that the maximum stresses are induced around the dome knuckles for the prolate and the oblate cylinders. The results of the burst tests for the three cylinders show that the burst initiates from the cylinder body of the iso-dome cylinder and from the dome knuckles of the prolate and the oblate cylinders. Finally, it is recommended that, to comply with DOT CFFC 2007, the dome shape should be designed and fabricated as guided by the isotensoid dome theory.

키워드

참고문헌

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