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Title: Inversion of voltage measurements to predict crack shape
Authors: McIver, M.
Keywords: Eddy currents
Measurement and measuring
Instrumentation and measuring science
Issue Date: 1990
Publisher: IET
Citation: MCIVER, M., 1990. Inversion of voltage measurements to predict crack shape.. IEE Proceedings-A Physical Science, Measurement and Instrumentation, Management and Education Reviews, 137 (3), pp.126-130.
Abstract: A surface-breaking crack in a metal sheet may be detected by passing an alternating current through the sheet. The perturbations in the surface electric field, produced by the crack, may be observed by making measurements of the voltage on the metal surface. In an earlier paper, it was shown that the crack shape could be predicted from the distribution of potential along the top of the crack. This work extends the previous work to the more realistic case, where the initial data is in the form of measurements of the potential difference, rather than the potential itself. In addition, it is assumed that the strength of the upstream electric field is unknown. A Fredholm integral equation of the second kind is derived, for the potential distribution along the top of the crack, in terms of measurements of the potential difference. This equation is solved using theoretical voltage distributions derived from idealised ~ crack shapes.
Description: This article is closed access.
Version: Closed access
DOI: 10.1049/ip-a-2.1990.0019
URI: https://dspace.lboro.ac.uk/2134/11789
Publisher Link: http://dx.doi.org/10.1049/ip-a-2.1990.0019
ISSN: 0143-702X
Appears in Collections:Closed Access (Maths)

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