| 用改进的均方根法估算谱载下疲劳裂纹起始寿命 |
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| 引用本文： | 王永廉.用改进的均方根法估算谱载下疲劳裂纹起始寿命[J].强度与环境,2003,30(3):29-33. |
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| 作者姓名： | 王永廉 |
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| 作者单位： | 南京工程学院材料工程系,江苏,南京,210013 |
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| 摘 要： | 根据变幅疲劳的基本特性，对估算谱载下疲劳裂纹起始寿命的均方根法作了改进。三种谱载下十一组变幅疲劳试验数据的评价结果表明，改进的均方根法在保留均方根法原有的仅依赖于等幅疲劳试验数据、计算方便的优点的同时，计算精度有了明显提高。
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| 关 键 词： | 均方根法 估算谱载 疲劳裂纹起始寿命 变幅疲劳 工程构件 |
| 文章编号： | 1006-3919(2003)03-0029-05 |
| 修稿时间： | 2002年12月24 |
Modified Root-Mean-Square Method for Estimation of Fatigue Crack Initiation Life under Spectrum Loading |
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| WANG Yong-lian.Modified Root-Mean-Square Method for Estimation of Fatigue Crack Initiation Life under Spectrum Loading[J].Structure & Environment Engineering,2003,30(3):29-33. |
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| Authors: | WANG Yong-lian |
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| Abstract: | Root-Mean-Square method for Estimation of fatigue crack initiation life under spectrum loading has been modified in terms of basic behaviors of random fatigue. Evaluating results of eleven set of random fatigue test data under three spectrum types have showed that the modified Root-Mean-Square method improves obviously prediction accuracy while continuing to have the advantage of depending on only constant amplitude fatigue test data and convenience to use. |
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| Keywords: | Fatigue Life Prediction Random load |
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