| 耐久性分析的裂纹萌生方法研究 |
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| 引用本文： | 刘文珽,熊峻江.耐久性分析的裂纹萌生方法研究[J].航空学报,1992,13(3):182-186. |
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| 作者姓名： | 刘文珽 熊峻江 |
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| 作者单位： | 北京航空航天大学508教研室 北京 100083 |
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| 摘 要： | 本文以裂纹尺寸达到经济修理极限对应的结构细节条件裂纹萌生P-S-N曲线为基础,将谱载下安全寿命的存活率与裂纹超越数概率联系在一起,建立各应力区的P(i,τ)随时间变化曲线,进而评估指定时间的结构损伤度,并预测经济寿命,构成完整的耐久性裂纹萌生方法,最后给出一个简单实例。
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| 关 键 词： | 耐久性分析 裂纹萌生 经济寿命 |
| 收稿时间： | 1991-07-04 |
| 修稿时间： | 1991-10-10 |
A STUDY ON CRACK INITIATION METHOD FOR DURABILITY ANALYSIS |
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| Liu Wen-ting,Xiong Jun-jiang.A STUDY ON CRACK INITIATION METHOD FOR DURABILITY ANALYSIS[J].Acta Aeronautica et Astronautica Sinica,1992,13(3):182-186. |
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| Authors: | Liu Wen-ting Xiong Jun-jiang |
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| Institution: | Faculty 508 of Beijing University of Aeronautics and Astronautics,Beijing, 100083 |
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| Abstract: | In this paper, a crack initiation metho . for durability analysis is developed. The method connected the reliability of safe life under load spectrum with the crack exceedance probability on the basis of P-S-N curves for structure members crack initiation, the condition is that the crack length reaches economic repairment limit. And the P(i,τ)-τ curves of every stress region are established. Then the structure damage degree is evaluated and the structure economic life is predicted. Finally, a simple example is given. |
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| Keywords: | durability analysis crack initiation economic life |
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