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Diagnostics of deformational and fracture stages based on integral parameters of the flow of acoustic-emission acts

  • Acoustic methods
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Abstract

The relationships between the sequence of deformational and fracture stages in solids and the integral parameters of an accompanying acoustic emission (AE) are analyzed. A method for reconstruction of the true (radiated) intensity of flow, the spectrum, and the duration and energy of an AE-act is described and the results obtained are presented. The S-shape of the curve of AE-act flow is physically interpreted. The possibility of identifying the fracture stages and, based on the positions of the break points in this curve, estimating the concentration of defects and their multiplication constants is shown. It is found that the lower break point in the curve corresponds to the transition point from the stage of plastic deformation to the stage of scattered accumulation of flaws. It is suggested that the appearance of this break point be used for the early detection of a material’s destruction point. The upper break point is interpreted as the point of a change in the multiplication constant caused by the beginning of the localization of the defect generation process.

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Authors and Affiliations

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

    S. I. Builo

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  1. S. I. Builo
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Translated from Defektoskopiya, Vol. 40, No. 8, 2004, pp. 66–78. Original Russian Text Copyright © 2004 by Builo.

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Builo, S.I. Diagnostics of deformational and fracture stages based on integral parameters of the flow of acoustic-emission acts. Russ J Nondestruct Test 40, 552–560 (2004). https://doi.org/10.1007/PL00022124

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  • DOI: https://doi.org/10.1007/PL00022124

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