Advanced

Near Field Effects and Estimation of Poisson's Ratio in Impact-Echo Thickness Testing

Tofeldt, Oskar LU and Rydén, Nils LU (2015) 41st Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE) In 41st Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE) 1650. p.1415-1422
Abstract
Based on the polarization and shape of the first symmetric Lamb mode at the zero-group velocity point (S1-ZGV), a novel approach for Impact-Echo thickness testing is proposed. In this new approach all three plate parameters (thickness, velocity and Poisson's ratio) are estimated from the same wave mode (S1-ZGV). A traditional approach based on a measurement of the longitudinal-and Rayleigh wave velocity along the surface is also studied, and is found to be influenced by near field effects leading to an underestimated thickness. In addition, an alternative approach which estimates Poisson's ratio from the frequency ratio of the S1-ZGV and A2-ZGV point is discussed. The three studied approaches are demonstrated in a realistic field case.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
41st Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)
volume
1650
pages
1415 - 1422
publisher
American Institute of Physics
conference name
41st Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)
external identifiers
  • wos:000354938100168
ISSN
0094-243X
1551-7616
ISBN
978-0-7354-1292-7
DOI
10.1063/1.4914757
language
English
LU publication?
yes
id
d7b37e19-2b78-40a9-8c0b-c2a1932e432a (old id 7411030)
date added to LUP
2015-06-29 09:44:48
date last changed
2016-04-15 17:35:29
@inproceedings{d7b37e19-2b78-40a9-8c0b-c2a1932e432a,
  abstract     = {Based on the polarization and shape of the first symmetric Lamb mode at the zero-group velocity point (S1-ZGV), a novel approach for Impact-Echo thickness testing is proposed. In this new approach all three plate parameters (thickness, velocity and Poisson's ratio) are estimated from the same wave mode (S1-ZGV). A traditional approach based on a measurement of the longitudinal-and Rayleigh wave velocity along the surface is also studied, and is found to be influenced by near field effects leading to an underestimated thickness. In addition, an alternative approach which estimates Poisson's ratio from the frequency ratio of the S1-ZGV and A2-ZGV point is discussed. The three studied approaches are demonstrated in a realistic field case.},
  author       = {Tofeldt, Oskar and Rydén, Nils},
  booktitle    = {41st Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)},
  isbn         = {978-0-7354-1292-7},
  issn         = {0094-243X},
  language     = {eng},
  pages        = {1415--1422},
  publisher    = {American Institute of Physics},
  title        = {Near Field Effects and Estimation of Poisson's Ratio in Impact-Echo Thickness Testing},
  url          = {http://dx.doi.org/10.1063/1.4914757},
  volume       = {1650},
  year         = {2015},
}