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| Influence of Tank Water Environment on the Fatigue Safety Life of Tank Structure |
| Received:April 20, 2021 Revised:May 07, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.06.016 |
| KeyWord:tank water safe life corrosion fatigue tank structure severe spectrum scatter factor |
| Author | Institution |
| WANG Qiang |
Chengdu Aircraft Design & Research Institute, Chengdu , China |
| WANG Yong-jun |
Chengdu Aircraft Design & Research Institute, Chengdu , China |
| DONG Jiang |
Chengdu Aircraft Design & Research Institute, Chengdu , China |
| XIAO Feng |
Chengdu Aircraft Design & Research Institute, Chengdu , China |
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| Abstract: |
| In order to explore the influence of tank water on fatigue safe life of aircraft in service, and to evaluate whether the safety life determined by the conventional fatigue life divided by the fatigue dispersion coefficient can guarantee the flight safety in service environment, an experimental study was carried out. The corrosion medium concentration is determined by the test. Combined with the use characteristics of the aircraft, the load-environment spectrum is also determined. On the basis of this, the pre-corrosion and corrosion-fatigue process of the tank structure on the ground and in the air are simulated. The safe life of the structure under the corrosion-corrosion fatigue was studied using the reliability analysis on fatigue life with separated structural and load spectrum scatters. The results show that the corrosion environment results in reduced median life, as that fatigue quality of the structure was reduced, but the corrosion environment has no effect on the dispersion of the structure life; the fatigue scatter factor of severe spectrum can ensure the safety of tank structure. |
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