Systematic errors in Impact-Echo thickness estimation due to near field effects
(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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5070050
- author
- Tofeldt, Oskar LU and Rydén, Nils LU
- organization
- publishing date
- 2015
- 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
- 2016-04-01 11:07:34
- date last changed
- 2022-01-26 05:38:55
@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}}, keywords = {{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}}, doi = {{10.1016/j.ndteint.2014.09.003}}, volume = {{69}}, year = {{2015}}, }