|
| Identification and Evaluation of Corrosion Damage in Aircraft Skin Covered by Coatings |
| Received:January 26, 2025 Revised:March 18, 2025 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2025.04.006 |
| KeyWord:aircraft skin array eddy current in-situ nondestructive testing quantitative evaluation coating corrosion damage |
| Author | Institution |
| SHAN Borong |
Qingdao Branch of Naval Aeronautical University, Shandong Qingdao , China |
| QIU Songping |
93395 Unit of PLA, Shandong Gaomi , China |
| SHANG Zhi |
Qingdao Branch of Naval Aeronautical University, Shandong Qingdao , China |
| FAN Weijie |
Qingdao Branch of Naval Aeronautical University, Shandong Qingdao , China |
| CHEN Xinbo |
Qingdao Branch of Naval Aeronautical University, Shandong Qingdao , China |
| LI Xiaoli |
Qingdao Branch of Naval Aeronautical University, Shandong Qingdao , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to solve the technical problemof rapid detection and quantitative evaluation of corrosion damage of aircraft skin under coatings. Combined with the actual working conditions, array eddy current testing was selected as the in-situ nondestructive testing method to study the quantitative evaluation method for corrosion damage characteristics of Al alloy. Through the design and testing of prefabricated defect test blocks, the optimal detection frequency for detecting corrosion damage on the skin of aircraft was determined and the change rules of the array eddy current detection signal were obtained. The detection sensitivity gradually rose with the detection frequency increased. When the detection frequency exceeded 1.0 MHz, the voltage at the defect edge became excessively high, leading to distortion and affecting the quantification of defects. Through normal probability distribution and univariate linear-regression analysis, the quantitative relationship y=1 559.7x+8.264 between defect depth and detection signals was obtained, and the problem of quantitative evaluation of array eddy current instrument impedance display was solved. The array eddy current detection technology can effectively solve the problem in detecting the damage of the aircraft skin under coatings and has obvious advantages in terms of detection efficiency, signal display and quantitative evaluation and the quantitative relationship obtained accords with the actual situation, so it can realize automatic evaluation and has guiding significance for practical application. |
| Close |
|
|
|