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| Method for Prediction of Corrosion Damage Based on Log-normal Distribution |
| Received:August 16, 2019 Revised:September 21, 2019 |
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| DOI：10.7643/issn.1672-9242.2019.11.005 |
| KeyWord:log-normal distribution aircraft aluminum alloy structure corrosion damage |
| Author | Institution |
| WANG Qiang |
Chengdu Aircraft Design & Research Institute, Chengdu , China |
| ZHONG Yong |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| WU Shuai |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| SU Yan |
Southwest Technology and Engineering Research Institute, Chongqing , China |
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| Abstract: |
| Objective To study a method for prediction of corrosion damage in aircraft aluminum alloy structure and provide support for the economic repair of the aircraft structure. Methods The statistical method based on log-normal distribution was applied to study the distribution rule of corrosion damage of aircraft aluminum alloy structure in service and build a probability-based prediction method for corrosion damage on this basis. Results The corrosion damage distribution can be described through log-normal distribution, and the probability prediction method based on log-normal distribution had different accuracy under different reliability. Conclusion The corrosion damage prediction method, which is based on log-normal distribution, could predict the corrosion damage. As time goes by, the propagation rates of corrosion depth, area and volume of aircraft aluminum alloy structure in service slow down. |
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