Rosette eddy current sensor and its experimental research on aircraft metallic structure fatigue damage monitoring

被引：3

作者：

Ding, Hua ^{[1
]}

He, Yuting ^{[1
]}

Du, Jinqiang ^{[1
]}

Jiao, Shenbo ^{[1
]}

机构：

[1] Aeronautics and Astronautics Engineering College, Air Force Engineering University

来源：

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2013年 / 49卷 / 02期

关键词：

Aircraft metallic structure; Fatigue damage; Fractographic quantitative analysis; Rosette eddy current sensor; Structural health monitoring;

D O I：

10.3901/JME.2013.02.001

中图分类号：

学科分类号：

摘要：

Fatigue damage monitoring of aircraft metallic structure is critical to flight safety. Based on the previous work of ref.[13], a kind of rosette eddy current sensor is proposed, and monitoring experiment of 2A12-T4 aluminum alloy under constant load based on constructed fatigue-crack monitoring system is carried out, which intends to validate the quantitative crack-monitoring capability of rosette eddy sensor through comparison between experimental result and fractographic quantitative analysis result. The comparison result shows that amplitude ratio of sensing-channel signal is sensitive to the crack propagation, and has step feature. When the crack extends from the position of sensing-channel to adjacent channel position, the amplitude ratio of sensing-channel signal increases sharply, and then increases slowly after the adjacent channel position. Viewing the changing-point as indication of crack position, the quantitative-monitoring capability of fatigue crack is achieved by rosette eddy current sensor with precision of 1 mm, and the sensing-channels near fatigue source are capable of qualitative-monitoring of accumulated fatigue damage. © 2013 Journal of Mechanical Engineering.

引用

页码：1 / 7

页数：6

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