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| Durability Evaluation on the Aircraft Structure in Equivalent Accelerated Corrosion |
| Received:September 12, 2016 Revised:March 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.03.017 |
| KeyWord:critical structure equivalent accelerated corrosion testing corrosion damage durability |
| Author | Institution |
| TAN Xiao-ming |
Naval Aeronautical Engineering Academy Qingdao Branch, Qingdao , China |
| WANG De |
Naval Aeronautical Engineering Academy Qingdao Branch, Qingdao , China |
| YI Feng-xian |
Naval 92514, Yantai , China |
| WANG Gang |
Naval Aeronautical Engineering Academy Qingdao Branch, Qingdao , China |
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| Abstract: |
| Objective To research the durability of simulated sample for structural details of flanges under longitudinal wall of aircraft wing. Methods An acceleration test spectrum for coastal airport environment was drawn up according to environmental data measured to carry out accelerated corrosion test of different equivalent corrosion years. Then a durability test was carried out. An equivalent initial flaw size(EIFS) distribution was established to characterize the initial fatigue quality (IFQ) of critical details with corrosion damage, on the assumption of time-to-crack initiation(TTCI) followed double-parameter Weibull distribution and Logarithmic Normal distribution, which was used to predict the economic life of outer wings of aircraft fleet. Results The corrosion damage was equivalent to corrosion 1a in sea atmospheric environment after the aluminum alloy material reacted in 5% of NaCl salt-fog environment at θ=40 ℃ and pH=4.0. Conclusion The durability of the key structure meets the service life requirements in coastal airport environment. |
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