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Ultrasonic classification of imperfect interfaces

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Abstract

Ultrasonic reflection measurements from material interfaces are commonly used to detect and quantitatively characterize boundary imperfections of different kinds. Either shear or longitudinal waves can be used to assess the degree of the interface imperfection in acoustical terms. On the other hand, the evaluation of this data in terms of strength-related mechanical properties requiresa priori knowledge of the physical nature of the imperfection. It is shown in this paper that the ratio between the normal and transverse interfacial stiffnesses can be used to classify the interface imperfection. This ratio is readily measured, e.g., by comparing the longitudinal and shear reflection coefficients at normal incidence. Both theoretical and experimental results indicate that different types of imperfections, such as kissing, partial, and slip bonds, can be distinguished by this simple technique.

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Authors and Affiliations

  1. Department of Welding Engineering, The Ohio State University, 43210, Columbus, Ohio

    Peter B. Nagy

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  1. Peter B. Nagy
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Nagy, P.B. Ultrasonic classification of imperfect interfaces. J Nondestruct Eval 11, 127–139 (1992). https://doi.org/10.1007/BF00566404

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  • DOI: https://doi.org/10.1007/BF00566404

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