Three dimensional evaluation of aluminum plates with wall-thinning by full-field pulse-echo laser ultrasound

被引：50

作者：

Hong, Seung-Chan ^{[1
]}

Abetew, Ayalsew-Dagnew ^{[1
]}

Lee, Jung-Ryul ^{[1
]}

Ihn, Jeong-Beom ^{[2
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Aerosp Engn, 291 Daehak Ro, Daejeon 34141, South Korea

[2] Boeing Res & Technol, Struct Technol, Seattle, WA USA

来源：

OPTICS AND LASERS IN ENGINEERING | 2017年 / 99卷

基金：

新加坡国家研究基金会;

关键词：

Q-switched laser; Laser Doppler vibrometer; Full-field pulse; echo ultrasonic wave propagation imaging; Laser ultrasonic C-scan; Wall-thinning damage;

D O I：

10.1016/j.optlaseng.2016.08.010

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a full-field pulse-echo laser ultrasonic wave propagation imager (FF-PE-UPI) for the evaluation of structural defects. The FF-PE-UPI consists of a Q-switched laser for the generation of thermoelastic waves, a laser Doppler vibrometer (LDV) for sensing, and a two-axis translation stage for raster scanning of the combined generation and sensing laser beams. A-scan, B-scan, and C-scan data representations are used for the evaluation of structural defects. Three specimens were tested: a 4-mm aluminum plate with an area of 50% thickness reduction, a 6-mm aluminum plate with an area of 25% thickness reduction, and an 8-mm aluminum plate with engraved letters. The damages on the tested specimens were successfully visualized.

引用

页码：58 / 65

页数：8

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