In-situ monitoring of fatigue crack growth at fastener holes using Rayleigh-like waves

被引：0
|
作者：
Masserey, B. [1 ]
Fromme, P. [1 ]
机构：
[1] UCL, Dept Mech Engn, London WC1E 7JE, England
来源：
REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOL 27A AND 27B | 2008年 / 975卷
关键词：
crack detection and sizing; fatigue crack monitoring; scattering; Rayleigh waves;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The development of fatigue cracks at fastener holes is a common problem in aircraft maintenance. This contribution investigates the use of Rayleigh-like waves for the in-situ monitoring of fatigue crack growth in tensile, aluminum specimens. Experimentally the Rayleigh-like wave is excited using standard angle beam transducers and measured using either standard pulse-echo equipment or laser interferometry. The combined scattered field of the Rayleigh-like wave at the fastener hole and crack is measured and compared to finite difference (FD) simulations. The measured changes in the pulse-echo ultrasonic signal due to fatigue crack growth are evaluated using an energy ratio parameter and correlated to the optically measured crack length.
引用
收藏
页码：1484 / 1491
页数：8
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