Application of Laser Ultrasonic Technique for Non-contact Detection of Angled Surface Defects

被引：0
|
作者：
Guo Ruipeng [1 ]
Liu Jinghua [1 ]
Wang Haitao [1 ]
机构：
[1] College of Automation Engineering,Nanjing University of Aeronautics and Astronautics
来源：
Transactions of Nanjing University of Aeronautics and Astronautics | 2018年 / 35卷 / 05期
基金：
中国国家自然科学基金;
关键词：
laser ultrasound; surface acoustic wave; angled surface defect; spectrum;
D O I：
10.16356/j.1005-1120.2018.05.858
中图分类号：
TB302.5 [组织检查法、非破坏性试验法];
学科分类号：
0805 ; 080502 ;
摘要：
Based on the finite element method,the angled surface defects have been investigated by using the laser generated surface acoustic wave(SAW).The feature of laser generated SAW interaction with the angled defect is analyzed in time and frequency domains.An increase in the amplitude of SAW at the edge of the defect is observed,and the spectral feature is angle dependent.With the angle decreasing from 120°to 30°,the maximum amplitude of frequency spectrum of SAW increases gradually.The corresponding experimental results verify the feasibility of numerical analyses and reach a good agreement with simulation results.
引用
收藏
页码：858 / 865
页数：8
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