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Relation between the amplitude of acoustic emission of an ensemble of microflaws and the deformation rate: Reconstruction of the number of AE events during a change in the dynamic range of detected signals

  • Acoustic Methods
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Abstract

A model of acoustic emission from a dislocation cluster during its passage through a boundary is considered. A dependence of the amplitude of an acoustic-emission (AE) event on the deformation rate and the loading frequency has been obtained. Algorithms for reconstructing the number of lost AE events below the discrimination threshold of the instrumentation are obtained for the case of a power-law amplitude distribution. A method for correcting the parameters of the detected stream of events at various discrimination thresholds, deformation rates, and loading frequencies is described. A method for estimating the dynamic range on the basis of the average value of the detected AE-signal amplitudes is proposed. We propose using the results of this study for increasing the reliability of the AE method for diagnostics of a prebreakdown state.

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References

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Authors and Affiliations

  1. Vorovich Institute of Mechanics and Applied Mathematics, Rostov State University, pr. Stachki 200/1, Rostov-on-Don, 344090, Russia

    S. I. Builo

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  1. S. I. Builo
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Original Russian Text © S.I. Builo, 2007, published in Defektoskopiya, 2007, Vol. 43, No. 3, pp. 69–77.

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Builo, S.I. Relation between the amplitude of acoustic emission of an ensemble of microflaws and the deformation rate: Reconstruction of the number of AE events during a change in the dynamic range of detected signals. Russ J Nondestruct Test 43, 188–195 (2007). https://doi.org/10.1134/S1061830907030084

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  • DOI: https://doi.org/10.1134/S1061830907030084

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