Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지
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Evaluation of Multiaxial Fatigue Strength of a Urban Railway Wheel Steel

도시철도 차량 차륜재의 다축 피로강도 평가

  • Ahn, Jong-Gon (Graduate School of Railroad, Seoul National University of Science and Technology) ;
  • You, In-Dong (Graduate School of Railroad, Seoul National University of Science and Technology) ;
  • Kwon, Seok-Jin (Korean Railroad Research Institute) ;
  • Kim, Ho-Kyung (Department of Automotive Engineering, Seoul National University of Science and Technology)
  • 안종곤 (서울과학기술대학교 철도전문대학원) ;
  • 유인동 (서울과학기술대학교 철도전문대학원) ;
  • 권석진 (한국철도기술연구원) ;
  • 김호경 (서울과학기술대학교 자동차공학과)
  • Received : 2011.08.01
  • Accepted : 2012.04.05
  • Published : 2012.04.30
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Abstract

Uniaxial and biaxial torsional fatigue tests were conducted on the samples extracted from urban railway wheel steel. Ultimate and yield strengths of the steel were 1027.7 MPa and 626 MPa, respectively. The uniaxial fatigue limit was 422.5 MPa, corresponding 67% of the ultimate tensile strength. The ratio of ${\tau}_e/{\sigma}_e$ was 0.63. Fatigue strength coefficient and exponent were 1319.5 MPa and 0.339, respectively. Maximum principal and equivalent strain were found to be adequate parameter to predict fatigue lifetime of the steel under multiaixal fatigue condition.

Keywords

References

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