Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Evaluation of Fatigue Endurance for an MTB Frame

산악용 자전거 프레임의 피로 내구성 평가

  • Kim, Taek Young (Graduate School, Seoul National University of Science and Technology) ;
  • Lee, Man Suk (Graduate School, Seoul National University of Science and Technology) ;
  • Lim, Woong (Department of Automotive Engineering, Seoul National University of Science and Technology) ;
  • Kim, Ho Kyung (Department of Automotive Engineering, Seoul National University of Science and Technology)
  • 김택영 (서울과학기술대학교 대학원 자동차공학과) ;
  • 이만석 (서울과학기술대학교 대학원 자동차공학과) ;
  • 임웅 (서울과학기술대학교 기계.자동차공학과) ;
  • 김호경 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2012.06.06
  • Accepted : 2013.05.02
  • Published : 2013.06.30
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Abstract

In order to evaluate fatigue endurance for an MTB(mountain bike) frame, FEM(finite element method) analysis was performed. For evaluating the fatigue endurance of the MTB frame, the S-N data for Al-6061 fillet weldment were compared with the stress analysis results through FEM analysis of the frame. Three loading condition, pedalling, horizontal and vertical loading conditions were considered for fatigue endurance evaluation. Horizontal loading(+1200 N) condition was found to be the most severe to the frame. The maximum von Mises stress of the frame under horizontal loading(+1200 N) condition was determined 294 MPa through FEM analysis of the frame. Conclusively, on the basis of fatigue strength of 200 MPa at the number of cycles of 50,000, the MTB frame has an improper safety factor of approximately 0.25, suggesting that this frame needs reinforcement.

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References

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