Delamination damage detection of laminated composite beams using air-coupled ultrasonic transducers

被引:0
|
作者
ZengHua Liu
HongTao Yu
CunFu He
Bin Wu
机构
[1] Beijing University of Technology,College of Mechanical Engineering and Applied Electronics Technology
来源
Science China Physics, Mechanics and Astronomy | 2013年 / 56卷
关键词
delamination detection; composite beam; Lamb wave mode; air-coupled ultrasonic transducer; three-dimensional finite element simulation;
D O I
暂无
中图分类号
学科分类号
摘要
Air-coupled ultrasonic transducers are used to generate and receive Lamb waves in quasi-isotropic laminated composite beams for delamination detection. The influence of incident angle on the excited mode is studied. Numerical calculation and experimental results show that a pure Lamb wave mode can be generated if the transmitting transducer is oriented at a specific angle, and the receiving transducer can either be oriented to detect the same mode as that generated by the transmitter or to detect another mode generated by mode conversion at a defect. A three-dimensional finite element model is created to predict the interaction of Lamb waves with delamination, and some unique mechanisms of interaction between A0 mode Lamb waves and delamination are revealed in detail. The experimental results obtained on laminated composite beam using air-coupled ultrasonic transducers are well in accordance with finite element simulation results. Research results show that air-coupled ultrasonic guided waves can be used for delamination damage detection effectively in laminated composite beams.
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收藏
页码:1269 / 1279
页数:10
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