Fatigue Life Prediction of Automotive Rubber Component Subjected to a Variable Amplitude Loading

가변진폭하중에서의 자동차 고무 부품의 피로 수명 예측

  • Kim, Wan-Soo (Department of Mechanical Engineering, Chungnam National University) ;
  • Kim, Wan-Doo (Department of Future Technology, Korea Institute of Machinery and Materials) ;
  • Hong, Sung-In (Department of Mechanical Engineering, Chungnam National University)
  • 김완수 (충남대학교 기계공학과 대학원) ;
  • 김완두 (한국기계연구원 미래기술연구부) ;
  • 홍성인 (충남대학교 기계공학과)
  • Published : 2007.12.31


Fatigue life prediction methodology of the rubber component made of vulcanized natural rubber under variable amplitude loadings was studied. The displacement-controlled fatigue tests were conducted at different levels and the maximum Green-Lagrange strain was selected as damage parameters. A fatigue life curve of the rubber represented by the maximum Green-Lagrange strain was determined from the nonlinear finite element analysis. The transmission load history of SAE as variable amplitude loading was used to perform the fatigue life prediction. And then a signal processing of variable loading by racetrack and simplified rainflow cycle counting methods were performed. The modified miner's rule as cumulative damage summation was used. Finally, when the gate value is 30%, the predicted fatigue life of the rubber component agreed well with the experimental fatigue lives with a factor of two.


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