材料科学
超声波传感器
激光器
信号(编程语言)
光学
声学
无损检测
聚二甲基硅氧烷
激光超声
超声波
连续波
光电子学
半导体激光器理论
计算机科学
纳米技术
物理
程序设计语言
注射播种机
量子力学
作者
Taeyang Kim,Howuk Kim,Xiaoning Jiang
标识
DOI:10.35848/1347-4065/ac2012
摘要
The generation of ultrasonic surface waves with lasers has become a useful noncontact NDT&E tool. This laser ultrasound technique provides a very flexible and simple method for noncontact and remote generation of ultrasonic surface waves, and has the advantage that various wave shapes can be easily produced by changing the shape of the beam that is illuminating the target. In this work, a laser ultrasound NDT&E method is proposed for defect localization by incorporating an omni-arrayed patterned candle soot nanoparticles-polydimethylsiloxane (CSNP-PDMS) patch. The omni-arrayed CSNP-PDMS patch generates a surface wave with a selective range of frequency, and an omni-directional signal with high amplitude, which surpasses the limitation of the line-arrayed patch. Further, the arrival time algorithm was adopted to validate the effectiveness of the omni-directional patch for 2D damage detection, which in turn the maximum magnitude of contour mapping from calculation agrees well with the true defect location.
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