| 腐蚀疲劳裂纹扩展与寿命估算 |
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| 引用本文： | 王荣,路民旭,郑修麟.腐蚀疲劳裂纹扩展与寿命估算[J].航空学报,1993,14(3):188-192. |
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| 作者姓名： | 王荣 路民旭 郑修麟 |
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| 作者单位： | 西北工业大学401教研室,西安 710072 |
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| 摘 要： | 将有效的疲劳裂纹扩展速率表达式应用于腐蚀疲劳,对腐蚀疲劳裂纹扩展寿命估算进行了初步探讨。结果表明:腐蚀疲劳裂纹扩展速率(da/dN)_(CF)与(△K-△K_(thCF))在双对数坐标上呈线性关系。首次提出临界加载频率概念,频率高于临界加载频率,频率对裂纹扩展没有影响;频率低于临界加载频率,提出了表示频率对裂纹扩展速率影响的频率效应函数。经客观的验证,用文中提出的公式估算的腐蚀疲劳裂纹扩展寿命和实验寿命吻合良好。
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| 关 键 词： | 腐蚀疲劳 裂纹扩展 寿命估算 |
| 收稿时间： | 1992-07-16 |
| 修稿时间： | 1992-09-05 |
CRACK PROPAGATION AND LIFE PREDICTION UNDER CORROSION FATIGUE |
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| Wang Rong,Lou Ming-xiu,Zheng Xiu-lin.CRACK PROPAGATION AND LIFE PREDICTION UNDER CORROSION FATIGUE[J].Acta Aeronautica et Astronautica Sinica,1993,14(3):188-192. |
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| Authors: | Wang Rong Lou Ming-xiu Zheng Xiu-lin |
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| Institution: | Faculty 401 of Northwestern Polytechnical University, Xi'an, 710072 |
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| Abstract: | A study on the prediction of corrosion fatigue life has been carried out by applying the crack propagation rate formula for fatigue to corrosion fatigue. It results in that the crack propagation rate, (da / dN)CF, has a linear relationship with (ΔK - ΔKthCF) on double-Log plots. The concept of critical loading frequency,fc, has been put forward. When Loading frequency f≥fc, the frequency has no effect on (da / dN)CF. When f
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| Keywords: | corrosion fatigue crack propagation life prediction |
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