Length and depth resonances of surface cracks and their use for crack size estimation

descriptionPublicationkeyboard_double_arrow_right Article 01 Oct 1978 English Publisher:AIP PublishingJournal:Applied Physics Letters, volume 33, pages 557-559 (issn: 0003-6951, eissn: 1077-3118,

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Authors: V. Domarkas; B. T. Khuri-Yakub; G. S. Kino;

doi: 10.1063/1.90486

Length and depth resonances of surface cracks and their use for crack size estimation

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Abstract

Angular scattering from surface cracks has been used for determining the length of a surface crack. This technique assumes the physical availability of space to carry out an angular scattering experiment, and makes no estimation of the depth of the crack. In this work, we report a new technique where the scattering from surface cracks is made versus frequency, at one angle of incidence only. Length and depth resonances of the crack are observed and used to estimate the crack geometry. We made our measurements on EDM notches in steel. The geometry of the crack has been predicted with an accuracy of 10–20%.

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Stanford University
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