Surface Wave Scattering from Elliptical Cracks for Failure Prediction Tittmann, Bernard Buck, Otto Ahlberg, L de Billy, M Cohen-Tenoudji, F Jungman, A Quentin, G 2018-02-16T14:35:17.000 2020-06-30T06:27:01Z 2020-06-30T06:27:01Z 1979
dc.description.abstract <p>The scattered radiation patterns of surface cracks irradiated by acoustic surface waves are interpreted to provide estimates of crack length and aspect ratio, geometric crack parameters needed to enable failure prediction. The technique is demonstrated for circular and elliptical cracks as small as 100 μm in depth with an accuracy of about 10%. The key features are the positions and spacing of peaks and nulls in angular and frequency dependence of scattered surface intensity. A simple model based on optical diffraction theory is demonstrated on cracks in commercial hot-pressed silicon nitride studies at 100MHz and on spark eroded slots in commercial aluminum studies at 2-10 MHz. The results are used. to calculate the stress intensity factors and to describe the direction of crack propagation for a variety of real and simulated cracks. Implications of the technique with respect to crack closure and effects of stress and time are also discussed.</p>
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dc.identifier archive/
dc.identifier.articleid 4603
dc.identifier.contextkey 7232905
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1978/allpapers/1
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/|||Fri Jan 14 17:31:51 UTC 2022
dc.subject.disciplines Engineering Mechanics
dc.subject.disciplines Mechanics of Materials
dc.title Surface Wave Scattering from Elliptical Cracks for Failure Prediction
dc.type event
dc.type.genre event
dspace.entity.type Publication
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
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