Volume 31 Issue 12
Dec.  2005
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He Xiaofan, Wang Lei, Liu Wenting, et al. Generality analysis of the pre-corrosion influence on the fatigue life for aircraft structure[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005, 31(12): 1293-1298. (in Chinese)
Citation: He Xiaofan, Wang Lei, Liu Wenting, et al. Generality analysis of the pre-corrosion influence on the fatigue life for aircraft structure[J]. Journal of Beijing University of Aeronautics and Astronautics, 2005, 31(12): 1293-1298. (in Chinese)

Generality analysis of the pre-corrosion influence on the fatigue life for aircraft structure

  • Received Date: 30 Sep 2004
  • Publish Date: 31 Dec 2005
  • To analyze the influence of the different spectra loading, constant amplitude loading and crack size on the pre-corrosion influence factor (C(T)),the C(T) test assuming the fatigue life following the two-parameter Weibull distribution was proposed. The C(T) shows the pre-corrosion influence on aircraft structural life under different ground parking time is the ratio of pre-corrosion characteristic life to un-corrosion characteristic life when the pre-corrosion fatigue life located in the long life range. Assuming the slope of the Weibull distribution is material constant, and the unbiased characteristic life which was estimated with the maximum likehood estimation(MLE), the probability density function of the estimator was determined. The distribution function of the statistic C(T) was obtained, the C(T) contrast approach was proposed, and used to test the hypothesis that the C-T curve is general between different spectra loading, constant amplitude loading and crack size, the fatigue testing data shows that the C-T curve is weak-correlation with these influence factors.

     

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