Application of laser ultrasonic technique for non-contact detection of structural surface-breaking cracks

被引：101
作者：
Zhou, Zhenggan [1 ,2 ]
Zhang, Kuanshuang [1 ,2 ]
Zhou, Jianghua [1 ,2 ]
Sun, Guangkai [1 ,2 ]
Wang, Jie [1 ,2 ]
机构：
[1] Beihang Univ, Sch Mech Engn & Automat, Beijing 100191, Peoples R China
[2] Collaborat Innovat Ctr Adv Aeroengine, Beijing 100191, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2015年 / 73卷
基金：
中国国家自然科学基金;
关键词：
Surface-breaking crack; Laser ultrasound; Rayleigh wave; FINITE-ELEMENT-ANALYSIS; CFRP COMPOSITES; TURBINE BLADE; MICROSTRUCTURE; METAMATERIALS; SPECTROSCOPY;
D O I：
10.1016/j.optlastec.2015.04.026
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Based on the finite element method (FEM), the surface-breaking cracks have been investigated by using the laser-generated Rayleigh wave. The features of laser-generated Rayleigh wave interaction with cracks are analyzed in time and frequency domain. The simulation results show that the surface acoustic wave induced by the pulsed laser is sensitive to the surface-breaking cracks. As the crack depth increases, the transmission coefficients almost linearly decrease and the reflection coefficients show a dip. The corresponding experimental results have verified the feasibility of numerical calculation and reached a good agreement with simulation results. The research findings would provide a potential application for testing surface-breaking cracks of aircraft parts. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：173 / 178
页数：6
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