Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Evaluation of Fretting Fatigue Behavior for Railway Axle Material

철도 차축재료의 프레팅 피로거동 평가

  • Choi, Sung-Jong (School of Mechanical & Automotive Engineering, Kyungil University) ;
  • Kwon, Jong-Wan (School of Mechanical & Automotive Engineering, Kyungil University)
  • 최성종 (경일대학교 기계자동차학부) ;
  • 권종완 (경일대학교 기계자동차학부)
  • Published : 2007.09.01
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Abstract

Fretting is a kind of surface damage mechanism observed in mechanically jointed components and structures. The initial crack under fretting damage occurs at lower stress amplitude and lower cycles of cyclic loading than that under plain fatigue condition. This can be observed in automobile and railway vehicle, fossil and nuclear power plant, aircraft etc. In the present study, railway axle material RSA1 used for evaluation of fretting fatigue life. Plain and fretting fatigue tests were carried out using rotary bending fatigue tester with proving ring and bridge type contact pad. Through these experiments, it is found that the fretting fatigue limit decreased about 37% compared to the plain fatigue limit. In fretting fatigue, the wear debris is observed on the contact surface, and oblique cracks at an earlier stage are initiated in contact area. These results can be used as useful data in a structural integrity evaluation of railway axle.

Keywords

References

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