A hybrid finite difference/helmholtz integral scheme for ultrasonic scattering |
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| Authors: | D. Firth R. F. Gould |
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| Affiliation: | (1) NDT Department, Reactor Services, AEA Technology, WA3 6AT Risley, Warrington, UK |
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| Abstract: | Two techniques for analyzing the scattering of elastic waves by flaws are combined in a hybrid model. One is a finite difference scheme for handling the details of the interaction with the flaw, the other is a Helmholtz integral scheme for extending the results into the far field. Results are given for the diffraction coefficients for a semi-infinite thin crack, and for a 270° corner. |
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| Keywords: | Finite difference Helmholtz integral diffraction coefficients crack tip geometry |
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