Wave-based acoustic shearography for defect imaging

Z. W Tham; Y. F. Chen; C. Y. Tan; L. Zhang

doi:10.1117/12.2657486

18 April 2023 Wave-based acoustic shearography for defect imaging

Z. W Tham, Y. F. Chen, C. Y. Tan, L. Zhang

Proceedings Volume 12487, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVII; 124870P (2023) https://doi.org/10.1117/12.2657486
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States

Abstract

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.

Conference Presentation

Citation Download Citation

Z. W Tham, Y. F. Chen, C. Y. Tan, and L. Zhang "Wave-based acoustic shearography for defect imaging", Proc. SPIE 12487, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVII, 124870P (18 April 2023); https://doi.org/10.1117/12.2657486

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available