Please use this identifier to cite or link to this item: https://doi.org/10.1007/BF00570626
Title: The detection and measurement of symmetric corner cracks by the a.c. field method
Authors: Shang, H.M. 
Haq, R.
Collins, R.
Michael, D.H.
Keywords: surface potential measurements
symmetric corner cracks
Thin-skin electromagnetic fields
Issue Date: Dec-1986
Source: Shang, H.M.,Haq, R.,Collins, R.,Michael, D.H. (1986-12). The detection and measurement of symmetric corner cracks by the a.c. field method. Journal of Nondestructive Evaluation 5 (3-4) : 169-177. ScholarBank@NUS Repository. https://doi.org/10.1007/BF00570626
Abstract: An unfolding method, developed earlier for cracks in plane surfaces, is extended in this work to provide an approximate mathematical model for the perturbations produced by a symmetrical corner crack when interrogated by a surface electric field. The model disregards the nonuniform nature of the current distribution upstream of the crack which is produced by the presence of the corner, and this simplification leads to unfolded field problems of plane Laplacian form. The Schwarz-Christoffel transformation is applied here in their solution. Experimental measurements on slots cut on steel blocks to simulate corner cracks are found to be in good agreement with the predictions of the model. © 1986 Plenum Publishing Corporation.
Source Title: Journal of Nondestructive Evaluation
URI: http://scholarbank.nus.edu.sg/handle/10635/58785
ISSN: 01959298
DOI: 10.1007/BF00570626
Appears in Collections:Staff Publications

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