| 腐蚀条件下铝合金疲劳裂纹扩展试验及模型 |
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| 引用本文： | 鲍蕊,董彦民,张建宇,费斌军.腐蚀条件下铝合金疲劳裂纹扩展试验及模型[J].航空材料学报,2006,26(6):12-16. |
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| 作者姓名： | 鲍蕊 董彦民 张建宇 费斌军 |
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| 作者单位： | 北京航空航天大学,航空科学与工程学院,北京,100083 |
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| 摘 要： | 进行2024-T3铝合金标准中心裂纹拉伸试件4种典型环境下的裂纹扩展试验,以试验数据为基础,通过对一般环境下的裂纹扩展模型进行修正,建立腐蚀环境下的裂纹扩展模型.对试验结果的分析处理表明,该模型能够很好描述各种典型腐蚀环境下裂纹稳定扩展阶段的裂纹扩展速率,能够较准确估算裂纹扩展寿命,腐蚀修正系数清楚地反映腐蚀影响的程度.通过对单一介质环境腐蚀修正系数的加权组合,模型可以推广应用于复杂环境下裂纹扩展分析.该模型便于充分利用现有材料裂纹扩展性能的数据.
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| 关 键 词： | 腐蚀疲劳 裂纹扩展 试验 铝合金 |
| 文章编号： | 1005-5053(2006)06-0012-05 |
| 修稿时间： | 2005年11月15 |
Fatigue Crack Growth Experiments and Model in Corrosive Environment for Aluminum Alloy |
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| BAO Rui,DONG Yan-min,ZHANG Jian-yu,FEI Bin-jun.Fatigue Crack Growth Experiments and Model in Corrosive Environment for Aluminum Alloy[J].Journal of Aeronautical Materials,2006,26(6):12-16. |
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| Authors: | BAO Rui DONG Yan-min ZHANG Jian-yu FEI Bin-jun |
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| Abstract: | Experiments with CCT specimens of 2024-T3 aluminum alloy in 4 kinds of typical environments were conducted and a corrosion fatigue crack growth model was presented.The discussion based on the testing results shows that the model has a great capability in describing the corrosion fatigue crack growth rate as well as predicting crack growth life in different environments and the influence of corrosion can be understood clearly by the corrosion modification factors.Via averaging these factors in mono-medium environments in weight,the model can also be applied to the analysis of crack growth in perplexing environments reasonably.The model has a great advantage for the full usage of the existing crack growth probability data of materials. |
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| Keywords: | corrosion fatigue crack propagation experiment aluminum alloy |
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