| 给定寿命下的疲劳裂纹尺寸分布 |
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| 引用本文： | 傅惠民,高镇同.给定寿命下的疲劳裂纹尺寸分布[J].航空学报,1988,9(3):113-118. |
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| 作者姓名： | 傅惠民 高镇同 |
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| 作者单位： | 北京航空学院
(傅惠民)，北京航空学院(高镇同) |
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| 摘 要： | 本文论证了疲劳裂纹超值概率和疲劳寿命破坏率之间的等同性。由给定裂纹尺寸下疲劳寿命的分布推导出给定寿命下疲劳裂纹超值概率和疲劳裂纹尺寸分布,建立了三维空间的P-a-t曲面方程。
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| 收稿时间： | 1987-05-11; |
DISTRIBUTION OF CRACK SIZES AT A GIVEN LIFE |
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| Fu Hultnin and Gao Zhentong.DISTRIBUTION OF CRACK SIZES AT A GIVEN LIFE[J].Acta Aeronautica et Astronautica Sinica,1988,9(3):113-118. |
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| Authors: | Fu Hultnin and Gao Zhentong |
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| Institution: | Beijing Institute of Aeronautics and Astronautics |
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| Abstract: | The identity between the probability of occurrence of a crack which is larger than a given crack size a0 at t =t* and the probability of fatigue life which is less than t*at a=a0 is proved in this paper. The functional relation between the distribution of fatigue, life and the. distribution of crack sizes is established by probabilistic approach. In virtue of this relation the probability of crack exceedence and the probability density function of crack sizes at a given life, can be derived from those of fatigue life at a prescribed crack size. A P-a-t surface is also presented in this paper. |
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| Keywords: | durability fatigue probability of crack exceedence faligne life distribution P-a-t surface |
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