Monitoring thicknesses along a line using SH guided waves
File(s)
Author(s)
Howard, R
Cegla, F
Type
Conference Paper
Abstract
Guided wave technology has been successfully implemented in the field of NDT as a defect screening technique for many years. The existing technique is able to detect large defects in pipes, albeit with limited sensitivity since the technique operates at low frequencies (10-70kHz). Ultrasonic wall thickness monitoring is also a well-established technique; using frequencies in the MHz range these spot measurements are able to measure precise wall thicknesses, but are very spatially selective. This project aims to explore the middle ground, using higher frequency guided waves to increase sensitivity whilst increasing the spatial area covered. SH guided waves (SH0 and SH1 modes) were sent between two transducers in a plate (simulating the propagation of a guided wave around the circumference of a pipe) and the time trace of the receiving transducer was analysed for changes in the group velocity as different defects were introduced into the plate. It is shown that the guided wave-defect interactions were too distorted for accurate thickness profiles to be extracted from line measurements. However, it is believed that this method can be a qualitative tool for defect screening.
Editor(s)
Chimenti, DE
Bond, LJ
Date Issued
2016-02-28
Date Acceptance
2015-07-26
Citation
42nd Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE), 2016, 1706
ISSN
0094-243X
Publisher
American Institute of Physics
Journal / Book Title
42nd Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)
Volume
1706
Copyright Statement
© 2016 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000371907800040&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
EP/L022125/1
Source
42nd Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)
Subjects
Science & Technology
Physical Sciences
Physics, Applied
Physics
Publication Status
Published
Start Date
2015-07-26
Finish Date
2015-07-31
Coverage Spatial
Minneapolis, Minnesota, USA