Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Evaluation of Fatigue Crack Initiation Life in a Press-Fitted Shaft Considering the Fretting Wear

프레팅 마모를 고려한 압입축의 피로균열 발생수명 예측

  • 이동형 (한국철도기술연구원) ;
  • 권석진 (한국철도기술연구원 철도시스템연구본부) ;
  • 유원희 (한국철도기술연구원 철도시스템연구본부) ;
  • 최재붕 (성균관대학교 기계공학부) ;
  • 김영진 (성균관대학교 기계공학부)
  • Published : 2009.10.01

Abstract

In this paper, the procedure to estimate fatigue crack initiation life has been established by considering fretting wear and multiaxial stress states on the contact surface of press-fitted shafts. And a method to calculate the local friction coefficient during the running-in period of fretting wear process has been proposed. The predicted result of worn surface profile in the press-fitted shaft with non-linear local friction coefficient can avoid excessive wear depth estimation compared with that for the case of constant local friction coefficient. Furthermore, the predicted fatigue crack initiation lives based on Smith-Watson-Topper model considering the fretting wear are in good agreement with the experimental data. Consequently, the present method is valid not only for predicting worn surface profile, but also for assessing fatigue crack initiation lives considering the fretting wear during the running-in period in press fits.

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References

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