Damage identification method of Aluminum alloy pore structure based on piezoelectric sensor

被引：0
|
作者：
Zhang W. [1 ]
Xu D. [1 ]
Liu X. [2 ]
Ran Y. [3 ]
Wang X. [3 ]
机构：
[1] School of Reliability and Systems Engineering, Beihang University, Beijing
[2] School of Aeronautic Science and Engineering, Beihang University, Beijing
[3] School of Energy and Power Engineering, Beihang University, Beijing
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2022年 / 53卷 / 05期
关键词：
Aluminum alloy; Corrosion damage; Fatigue crack; Piezoelectric sensor;
D O I：
10.11817/j.issn.1672-7207.2022.05.009
中图分类号：
学科分类号：
摘要：
A method for corrosion damage and fatigue crack caused by corrosion at the central hole of aluminum alloy based on Lamb wave was proposed to identify damage types. The pitch-catch piezoelectric sensor layout and ScanGenie II integrated structural health monitoring scanning system were applied. The frequency of Lamb wave was 50-200 kHz, the sampling frequency was 12×106s-1 and 24×106s-1, respectively. The finally S0 and A0 mode of Lamb wave with different damage types were extracted for analysis. The results show that Lamb wave S0 mode is sensitive to fatigue crack propagation damage caused by corrosion, and the amplitude of S0 mode decreases gradually with crack propagation. Lamb wave A0 mode is sensitive to corrosion damage. With the increase of corrosion area, the amplitude of A0 mode increases gradually, and with the increase of corrosion depth, the amplitude of A0 mode decreases gradually. Extracting specific Lamb wave mode and calculating the damage index, and establishing mathematical model can predict the damage size. © 2022, Central South University Press. All right reserved.
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页码：1635 / 1642
页数：7
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