航空学报 > 1990, Vol. 11 Issue (10): 488-491

国产材料疲劳寿命分布参数α的初步估计

周希沅   

  1. 飞机结构热强度研究所
  • 收稿日期:1988-12-08 修回日期:1989-02-15 出版日期:1990-10-25 发布日期:1990-10-25

PRELIMINARY ESTIMATION OF THE SHAPE PARAMETERS OF FATIGUE LIFE DISTRIBUTION FOR HOME-MADE MATERIALS

Zhou Xiyuan   

  1. Institute of Aero-structure Thermal Strength
  • Received:1988-12-08 Revised:1989-02-15 Online:1990-10-25 Published:1990-10-25

摘要: <正> The fatigue-tested data of home-made materials and simple structure data are collected, which consist of 488 groups of 2705 specimens for aluminum alloys ; 313 groups of 1798 specimens for alloy steels) 79 groups of 389 specimens for titanium alloys. The shape parameter a of two-parameter Weibull distribution is estimated with maximum-likelihood estimation method and the preliminary estimation of a is given. In this study, the estimated parameters of home-made materials coincide with the parameters of overseas materials and the parameters a suggested by the literature can be applied to home-made material, too. This work also studies the effects of stress concentration factor ranges of fatigue life and tensile strength of materials on the values of a.

关键词: 国产材料, 疲劳寿命分布参数α, 估计

Abstract: The fatigue-tested data of home-made materials and simple structure data are collected, which consist of 488 groups of 2705 specimens for aluminum alloys ; 313 groups of 1798 specimens for alloy steels) 79 groups of 389 specimens for titanium alloys. The shape parameter a of two-parameter Weibull distribution is estimated with maximum-likelihood estimation method and the preliminary estimation of a is given. In this study, the estimated parameters of home-made materials coincide with the parameters of overseas materials and the parameters a suggested by the literature can be applied to home-made material, too. This work also studies the effects of stress concentration factor ranges of fatigue life and tensile strength of materials on the values of a.

Key words: home-made materials, fatigue life distribution parameters, estimation