Non-contact local and global damage detection with integrated ultrasonic transducers

K.-T. Wu; C.-K. Jen; N. Mrad

doi:10.1117/12.776570

8 April 2008 Non-contact local and global damage detection with integrated ultrasonic transducers

K.-T. Wu, C.-K. Jen, N. Mrad

Proceedings Volume 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008; 69321J (2008) https://doi.org/10.1117/12.776570
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

Abstract

Miniature and light weight thick piezoelectric films (>40μm) integrated ultrasonic transducers (IUTs) for bulk longitudinal (L) and shear (S) and plate acoustic waves (PAW) propagation are presented. The unique and distinct advantages of these IUTs are that they can be fabricated, using sol-gel based technique, directly onto sample with complex structures including curved surfaces and require no couplant for operation. Using novel mode conversion methods, the L wave generated by IUTs can be converted to S, symmetric, anti-symmetric and shear-horizontal (SH) PAW. The experimental results agreed well with those obtained by a finite difference based method which solves the 3D visco-elastic wave equations. These IUTs can operate at temperatures at least up to 150°C, at center frequencies ranging from 1 to 20 MHz, and provide damage detection range of tens of centimeters in metallic structures. An inductive coupled technique is used to achieve non-contact measurements with these IUTs.

Citation Download Citation

K.-T. Wu, C.-K. Jen, and N. Mrad "Non-contact local and global damage detection with integrated ultrasonic transducers", Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 69321J (8 April 2008); https://doi.org/10.1117/12.776570

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