Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Effect of Rail Surface Damage on Contact Fatigue Life

레일표면손상이 접촉피로수명에 미치는 영향

  • Seo, Jung-Won (Testing and Certification Center, Korea Railroad Research Institute) ;
  • Lee, Dong-Hyong (High-speed Railway Systems Research Center, Korea Railroad Research Institute) ;
  • Ham, Young-Sam (Testing and Certification Center, Korea Railroad Research Institute) ;
  • Kwon, Sung-Tae (Testing and Certification Center, Korea Railroad Research Institute) ;
  • Kwon, Seok-Jin (High-speed Railway Systems Research Center, Korea Railroad Research Institute) ;
  • Cho, Ha-Yong (High-speed Railway Systems Research Center, Korea Railroad Research Institute)
  • 서정원 (한국철도기술연구원 시험인증안전센터) ;
  • 이동형 (한국철도기술연구원 고속철도연구본부) ;
  • 함영삼 (한국철도기술연구원 시험인증안전센터) ;
  • 권성태 (한국철도기술연구원 시험인증안전센터) ;
  • 권석진 (한국철도기술연구원 고속철도연구본부) ;
  • 최하영 (한국철도기술연구원 고속철도연구본부)
  • Received : 2012.03.30
  • Accepted : 2012.04.27
  • Published : 2012.06.01
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Abstract

Rails are subjected to damage from rolling contact fatigue, which leads to defects such as cracks. Rolling contact fatigue damages on the surface of rail such as head check, squats are one of growing problems. Another form of rail surface damage, known as "Ballast imprint" has become apparent. This form of damage is associated with ballast particles becoming trapped between the wheel and the surface of rail. These defects are still one of the key reasons for rail maintenance and replacement. In this study, we have investigated whether the ballast imprint is an initiator of head check type cracks and effect of defect size using Finite element analysis. The FE analysis were used to investigate stresses and strains in subsurface of defects according to variation of defect size. Based on loading cycles obtained from FE analysis, fatigue analysis for each point was carried out.

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References

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