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| Influences of Environment on Fatigue Life of a Typical Aircraft |
| Received:June 25, 2019 Revised:July 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2019.12.018 |
| KeyWord:environment random load spectrum the coating damage the median life |
| Author | Institution |
| MU Xian-lian |
Aviation Key Laboratory of Science and Technology on Structure Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| HU Yang |
Aviation Key Laboratory of Science and Technology on Structure Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| ZHANG Deng |
Aviation Key Laboratory of Science and Technology on Structure Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| ZHAO Lian-hong |
Aviation Key Laboratory of Science and Technology on Structure Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| LIU Cheng-chen |
Aviation Key Laboratory of Science and Technology on Structure Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| LIU Yuan-hai |
Aviation Key Laboratory of Science and Technology on Structure Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
| WANG Hao-wei |
Aviation Key Laboratory of Science and Technology on Structure Corrosion Prevention and Control, China Special Vehicle Research Institute, Jingmen , China |
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| Abstract: |
| Objective To research the effects of environment on the fatigue life of typical structures of aircraft. Method Typical simulated parts of the fuselage connected with the wall plate, the wing wall, the structure of the girder inside the wing, the horizontal tail and vertical fin joint were selected as the research object to carry out laboratory accelerated corrosion and alternating test of random load spectrum and load spectrum fatigue test to analyze the influences of environment on the surface coating damage, fatigue fracture location, fatigue source and the median life of the simulated parts of typical structural components, and establish the influence relationship of environment on the fatigue life of structural components. Result The ratio between the fatigue life of the simulated part of the structure after loading and the accelerated corrosion environment-fatigue life of the sample after fatigue life was used to estimate the impact of the environment on the fatigue life of the simulated part of the structure. The ratio k=1.2-2.5 and the higher the ratio, the greater the impact of the environment on the fatigue life of the sample Conclusion The influence of environment on the fatigue life of structure parts can be preliminarily estimated by the ratio between the fatigue life of the simulated part of the structure after loading and the accelerated corrosion environment-fatigue life of the sample after fatigue life; and the test results show that the external environment has greater influences on the fatigue life of the sample compared with the internal environment. |
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