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Systematic errors in Impact-Echo thickness estimation due to near field effects

Tofeldt, Oskar LU and Rydén, Nils LU (2015) In Ndt & e International 69. p.16-27
Abstract
Near field effects are found to create systematic errors, within the range of about 5-15%, in thickness estimations from Impact-Echo (IE) testing. This paper studies near field effects from a point source in a combined Multichannel Analysis of Surface Waves (MASW) and Impact-Echo analysis. The near field creates deviations in the measured velocity of the P-wave and the Rayleigh-wave, which lead to an underestimated thickness. This systematic error is identified in both a numerical and a real field case. The results are also compared with the conventional Impact-Echo method. (C) 2014 The Authors. Published by Elsevier Ltd.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Concrete, Impact-Echo, P-wave velocity, Thickness, Near field effect
in
Ndt & e International
volume
69
pages
16 - 27
publisher
Elsevier
external identifiers
  • wos:000347664000004
  • scopus:84908241836
ISSN
0963-8695
DOI
10.1016/j.ndteint.2014.09.003
language
English
LU publication?
yes
id
47d79bba-0a59-4d3d-ae46-552596efc5e4 (old id 5070050)
date added to LUP
2015-02-26 14:18:16
date last changed
2017-06-11 03:22:31
@article{47d79bba-0a59-4d3d-ae46-552596efc5e4,
  abstract     = {Near field effects are found to create systematic errors, within the range of about 5-15%, in thickness estimations from Impact-Echo (IE) testing. This paper studies near field effects from a point source in a combined Multichannel Analysis of Surface Waves (MASW) and Impact-Echo analysis. The near field creates deviations in the measured velocity of the P-wave and the Rayleigh-wave, which lead to an underestimated thickness. This systematic error is identified in both a numerical and a real field case. The results are also compared with the conventional Impact-Echo method. (C) 2014 The Authors. Published by Elsevier Ltd.},
  author       = {Tofeldt, Oskar and Rydén, Nils},
  issn         = {0963-8695},
  keyword      = {Concrete,Impact-Echo,P-wave velocity,Thickness,Near field effect},
  language     = {eng},
  pages        = {16--27},
  publisher    = {Elsevier},
  series       = {Ndt & e International},
  title        = {Systematic errors in Impact-Echo thickness estimation due to near field effects},
  url          = {http://dx.doi.org/10.1016/j.ndteint.2014.09.003},
  volume       = {69},
  year         = {2015},
}