Wave-Based Acoustic Shearography for Defect Imaging

被引:2
|
作者
Tham, Z. W. [1 ]
Chen, Y. F. [1 ]
Tan, C. Y. [1 ]
Zhang, L. [1 ]
机构
[1] ASTAR, Inst Mat Res & Engn IMRE, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore
来源
NONDESTRUCTIVE CHARACTERIZATION AND MONITORING OF ADVANCED MATERIALS, AEROSPACE, CIVIL INFRASTRUCTURE, AND TRANSPORTATION XVII | 2023年 / 12487卷
基金
新加坡国家研究基金会;
关键词
acoustic shearography; ultrasonic waves; non-destructive testing; defects;
D O I
10.1117/12.2657486
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
Acoustic shearography technique is a wave-based shearography method. In acoustic shearography, acoustic or ultrasonic waves are used to provide stress loading in the testing materials. Due to the deep penetration of acoustic waves and the flexibility of wave focusing control, acoustic shearography technique can detect deep subsurface defects in solid materials at the optical imaging speed. In this paper, the working principles, and the system setup of the acoustic shearography system are to be presented. Various acoustic excitation methods including acoustic excitation with dispersive acoustic transducers, directional and focusing acoustic wave transducers and pulsed laser beams are discussed. The applications of acoustic shearography for imaging of defects in thick metal structures are demonstrated. The acoustic shearography technique provides a feasible and practical solution for fast NDT of thick and large area structures.
引用
收藏
页数:6
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