Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on Detection of a Critical Spot and the Securing Safety Method of CFRP Bicycle Forks by Finite Element Method

유한요소법을 이용한 CFRP 자전거 포크의 취약부 탐색 및 안전성 확보 방안 연구

  • Lee, Su-Yeong (Department of Mechanical Engineering, Graguate Shcool of Seoul National University of Science and Technology) ;
  • Lee, Nam Ju (Department of Mechanical and Automative Engineering, Seoul National University of Science and Technology) ;
  • Choi, Ung-Jae (Win & Win) ;
  • Kim, Hong Seok (Department of Mechanical and Automative Engineering, Seoul National University of Science and Technology) ;
  • Shin, Ki-Hoon (Department of Mechanical and Automative Engineering, Seoul National University of Science and Technology) ;
  • Cheong, Seong-Kyun (Department of Mechanical and Automative Engineering, Seoul National University of Science and Technology)
  • 이수영 (서울과학기술대학교 일반대학원 기계공학과) ;
  • 이남주 (서울과학기술대학교 기계.자동차공학과) ;
  • 최웅재 ((주)윈엔윈) ;
  • 김홍석 (서울과학기술대학교 기계.자동차공학과) ;
  • 신기훈 (서울과학기술대학교 기계.자동차공학과) ;
  • 정성균 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2016.02.26
  • Accepted : 2016.12.12
  • Published : 2016.12.31
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Abstract

A bicycle is one of the most popular sporting goods in view of a sport activity and a human health. Metallic materials such as steel, aluminum, etc. were mainly used to the bicycle fork in the past. Nowadays, the carbon fiber reinforced composite materials are widely used to the manufacturing of a bicycle fork to reduce the weight and to increase the efficiency. Safety is a most important design parameter of a bicycle fork even if the weight and cost reduction are important. Bicycle failure may happen at the critical spot of a bicycle fork and cause the accident. In this paper, the composite bicycle fork will be analyzed to secure the safety and detect a critical spot by using the finite element method with Tsai-Wu failure criterion. The stress data were obtained for the laminated composites with various number of plies and fiber orientation under the bending load. Thus, design concept of a bicycle fork was proposed to secure the safety of a bicycle. The finite element analysis results show that the connection area between a steer tube and a fork blade is critical spot, and 75 or more layers of 0 degree are needed to secure the safety of a bicycle fork.

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References

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