Volume 29 Issue 3
Mar.  2003
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Jia Xinglan, Liu Wenting. Fatigue Life Estimation of Specimen under Spectrum LoadUsing Fuzzy Miners Rule[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(3): 218-220. (in Chinese)
Citation: Jia Xinglan, Liu Wenting. Fatigue Life Estimation of Specimen under Spectrum LoadUsing Fuzzy Miners Rule[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(3): 218-220. (in Chinese)

Fatigue Life Estimation of Specimen under Spectrum LoadUsing Fuzzy Miners Rule

  • Received Date: 28 Sep 2001
  • Publish Date: 31 Mar 2003
  • Fatigue damage exhibits some "fuzzy" character when the fatigue stress in load spectrum is lower slightly than fatigue limit. A Miner-s rule considering this "fuzzy" damage character is established by means of membership function of fuzzy mathematics. When a specimen is subjected to programmed spectrum loads, the estimation formula of fatigue life is derived according to regular Miner's rule and fuzzy Miner's rule. Comparing the results of calculations and fatigue experiments, it is shown that the estimation error of fatigue life is decreased by 18.33% with using fuzzy Miner's rule.

     

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