| 耐久性分析的特征应力法 |
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| 引用本文： | 王志智,聂学州,郑仲.耐久性分析的特征应力法[J].航空学报,1995,16(2):99-103. |
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| 作者姓名： | 王志智 聂学州 郑仲 |
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| 作者单位： | 飞机结构强度研究所 |
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| 摘 要： | 给出了以特征应力为参量表示的结构细节的ａ－ｓ－Ｎ曲线。利用此曲线、等寿命曲线和线性累积损伤理论将恒幅载荷下的（ａＫ，ＮＫ）数据转换为谱载下的（ａＫ，ｔＫ）数据，再由（ａＫ，ｔＫ）数据确定当量初始缺陷（ＥＩＦＳ）分布。进而分析裂纹超越数概率和结构损伤度，完成结构耐久性分析。
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| 关 键 词： | 耐久性 分布参数系统 裂纹 |
CHARACTERISTIC STRESS APPROACH FOR DURABILITY ANALYSIS |
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| Wang Zhizhi,Nie Xuezhou,Zheng Minzhong.CHARACTERISTIC STRESS APPROACH FOR DURABILITY ANALYSIS[J].Acta Aeronautica et Astronautica Sinica,1995,16(2):99-103. |
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| Authors: | Wang Zhizhi Nie Xuezhou Zheng Minzhong |
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| Institution: | Aircraft Structure Strength Research Institute,Xi'an, 710061 |
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| Abstract: | The a-s-N curve expressed by characteristic stress of structural details is presented. Then the ( a K ,N K ) data under constant loading are transformed into the ( a K ,t K ) data under spectrum loading by using Goodman diagram and Miner's rule,and equivalent initial flaw size (EIFS) distribution parameters are obtained by the ( a K ,t K ) data.Finally,the probability of crack exceedance and structural damage degree are calculated and the durability analysis is completed. |
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| Keywords: | durability distribution parameters systems crack |
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