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Volume 34 Issue 7
Jul.  2008
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Journal of Beijing University of Aeronautics and Astronautics  > 2008  >  34(7): 849-852.
Bao Rui, Zhang Jianyu, Fei Binjunet al. Estimation method for inadequate fatigue test result of structures with multi-similar-details[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(7): 849-852. (in Chinese)
Citation: Bao Rui, Zhang Jianyu, Fei Binjunet al. Estimation method for inadequate fatigue test result of structures with multi-similar-details[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(7): 849-852. (in Chinese)
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Estimation method for inadequate fatigue test result of structures with multi-similar-details

  • School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 09 Jul 2007
  • Publish Date: 31 Jul 2008
    Abstract
  • A method for estimating fatigue life distribution parameters with inadequate result obtained by fatigue test of structures with multi-similar-details was proposed. Based on the assumption that fatigue life follows the log-normal distribution and 2-parameter Weibull distribution respectively, the relationship of two kinds of distribution parameters, one was adopted to describe the single detail fatigue quality and the other was gained by inadequate test results of multi-similar-detail structures, was discussed. The analysis indicates that there is a significantly difference between the two kinds of parameters, however a determinate function of the amount of details can be obtained to describe this relationship. The way of estimating single detail fatigue distribution parameters via inadequate data was presented. Numerical simulations were conducted to analysis the effects of number of specimens and the amount of details on the estimating results, which shows that when the amount of details is not very large, it is the number of specimens, but not the amount of details, which has great effect on the dispersivity of parameter estimation.

     

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  • [1] 郑晓玲,李令芳.民机结构耐久性与损伤容限设计手册(上册).疲劳设计与分析[M].北京:航空工业出版社,2003:220 Zheng Xiaoling,Li Lingfang.Handbook of civil aircraft structures durability and damage tolerance design[M].Beijing:Aviation Industry Press,2003:220 (in Chinese) [2] Stone C J. A course in probability and statistics[M]. Beijing:China Machine Press, 2003:1-80 [3] 徐灏.概率疲劳[M].沈阳:东北大学出版社, 1994:10-12 Xu Hao, Probability fatigue[M]. Shenyang:Northeast University Press, 1994:10-12 (in Chinese). [4] 高镇同.应用疲劳统计学[M].北京:国防工业出版社, 1986:82-95 Gao Zhentong. Statistics in fatigue[M], Beijing:National Defense Industry Press,1986:82-95(in Chinese) [5] 王传胜,张建宇,鲍蕊,等.飞机结构多部位损伤发生的可能性分析[J].北京:北京航空航天大学学报, 2006,32(8):899-902 Wang Chuansheng, Zhang Jianyu, Bao Rui, et al. Reliability analysis on structure with multiple site damage[J]. Beijing:Journal of Beijing University of Aeronautics and Astronautics, 2006,32(8):899- 902(in Chinese)
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