| LY12-CZ铝合金预腐蚀及疲劳损伤研究 |
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| 引用本文： | 张有宏,吕国志,陈跃良.LY12-CZ铝合金预腐蚀及疲劳损伤研究[J].航空学报,2005,26(6):779-782. |
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| 作者姓名： | 张有宏 吕国志 陈跃良 |
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| 作者单位： | 1. 西北工业大学,航空学院,陕西,西安,710072
2. 西北工业大学,航空学院,陕西,西安,710072;海军航空工程学院,青岛分院,山东,青岛,266041 |
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| 摘 要： | 对实验室环境下LY12-CZ铝合金进行了预腐蚀及疲劳寿命与剩余强度的预测研究。在不同的温度及不同的腐蚀天数条件下,对试验件进行预腐蚀,按ASTMG34-1标准人工产生腐蚀坑,获得了腐蚀损伤数据,随后进行疲劳试验,初步建立了腐蚀损伤与疲劳寿命降低之间的关系。在试验研究基础上,用AFGROW软件模拟腐蚀损伤及腐蚀坑深度的不同对试件疲劳寿命和剩余强度产生的影响,建立了预测含腐蚀损伤试件的疲劳寿命与剩余强度的有效的工程方法。
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| 关 键 词： | 疲劳 剩余强度 裂纹扩展 腐蚀坑 腐蚀损伤 |
| 文章编号： | 1000-6893(2005)06-0779-04 |
| 修稿时间： | 2004年9月16日 |
Predicting Fatigue Life From Pre-corroded LY12-CZ Aluminium Test |
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| ZHANG You-hong,LU Guo-zhi,CHEN Yue-liang.Predicting Fatigue Life From Pre-corroded LY12-CZ Aluminium Test[J].Acta Aeronautica et Astronautica Sinica,2005,26(6):779-782. |
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| Authors: | ZHANG You-hong LU Guo-zhi CHEN Yue-liang |
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| Institution: | ZHANG You-hong~1,LU Guo-zhi~1,CHEN Yue-liang~ |
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| Abstract: | The fatigue life and residual strength after corrosion damage tests for laboratory specimens of LY12-CZ aluminum have been investigated.Under the conditions of several temperatures and durations of corroding,the specimens are exposed in corrosion solutions.Corrosion pits are artificially introduced according to ASTM standard G34-1.After getting the corrosion damage data,the fatigue tests are carried out.The primary relationship of the degradation of fatigue life and the corrosion damage are build.On the base of text result,the AFGROW software is used to simulate the influence of a variety of corrosion damages and corrosion pit depths on the specimen's fatigue life and residual strength.An effective engineering technique for predicting fatigue life and residual strength of corroded specimen is established on the base of this research work. |
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| Keywords: | fatigue residual strength crack growth corrosion pit corrosion damage |
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