| 无限寿命可靠性分析方法 |
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| 引用本文： | 傅惠民,高镇同,何志敏.无限寿命可靠性分析方法[J].航空学报,1991,12(2):123-126. |
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| 作者姓名： | 傅惠民 高镇同 何志敏 |
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| 作者单位： | 北京航空航天大学
(傅惠民，高镇同)，北京航空航天大学(何志敏) |
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| 摘 要： | 1.引言 材料在冶炼、加工和使用过程中,不可避免地存在各种初始缺陷或裂纹,对某些关键的或不易检修的构件(如螺旋桨叶、发动机气门弹簧等),常采用无限寿命设计,期望其中的初始缺陷或裂纹不继续扩展。这要求应力强度因子变程△K小于疲劳裂纹扩展门槛值△K_(th),而应力强度因子变程△K是应力变程△σ的函数X(△σ)与初始裂纹尺寸α_0的函数
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| 关 键 词： | 疲劳 疲劳门槛值 无限寿命设计 可靠性分析 |
A METHOD OF INFINITE-LIFE RELIABILITY ANALYSIS |
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| Beijing University of Aeronautics and Astronautics Fu Huimin,Gao Zhengtong and He Zhimin.A METHOD OF INFINITE-LIFE RELIABILITY ANALYSIS[J].Acta Aeronautica et Astronautica Sinica,1991,12(2):123-126. |
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| Authors: | Beijing University of Aeronautics and Astronautics Fu Huimin Gao Zhengtong and He Zhimin |
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| Institution: | Beijing University of Aeronautics and Astronautics |
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| Abstract: | A model of ΔK-ΔKth interference is presented, which is applicable to the reliability analysis and design of infinite life for structural members with cracks. By means of the model the reliability of no crack growth may be obtained, and the maximum permissible crack size or load can be determined at a given reliability level. |
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| Keywords: | fatigue fatigue threshold infinite-life design reliability analysis |
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