Burrows, S. E. (Susan E.), Dixon, S., Li, T. and Almond, Darryl (2010) Combined thermography and noncontact ultrasound inspection techniques using pulsed laser excitation. AIP Conference Proceedings (No.1211). pp. 510-517. doi:10.1063/1.3362437

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Abstract

A combined ultrasound and thermography system has been developed for identifying surface breaking defects using a raster scanned, Q-switched, pulsed Nd:YAG laser as both a thermal and an ultrasonic source. As the thermal spot approaches a defect, the lateral flow of heat in the substrate surface is disturbed, altering the spot shape. Ultrasound waves are also disturbed; by measuring the change in signal strength and frequency distribution of the received waveform, information regarding the position and depth of the crack can be obtained. Modelling of the interaction between Lamb waves and defects has been compared with experimental data.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science > Engineering Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Thermography, Ultrasonics, Finite element method, Surfaces (Technology) -- Defects
Journal or Publication Title:	AIP Conference Proceedings
Publisher:	American Institute of Physics
ISBN:	978-0-7354-0748-0
ISSN:	0094-243X
Editor:	Thompson, DO and Chimenti, DE
Official Date:	22 February 2010
Dates:	Date Event 22 February 2010 Published
Number:	No.1211
Number of Pages:	8
Page Range:	pp. 510-517
DOI:	10.1063/1.3362437
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Conference Paper Type:	Paper
Type of Event:	Conference

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