Abstract
A theoretical substantiation of the acoustic curve of growth of fatigue cracks is presented, including the main assumptions and the dependence of the amplitude of surface acoustic wave oscillations on the number of cycles in cyclic tests. It is shown that this dependence does not qualitatively contradict the classical theory of crack growth from notches. A criterion for previous damage intended for ensuring timely replacement of a fatigue-damaged article is considered. This criterion is implemented using the backscattering (acoustic fatigue curve) and signal-oscillation methods. It is asserted that the signal-oscillation method is an active low-frequency analogue of the acoustic-emission method.
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Original Russian Text © V.L. Busov, 2008, published in Defektoskopiya, 2008, Vol. 44, No. 9, pp. 64–69.
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Busov, V.L. Acoustic analogue of the curve of growth of fatigue cracks. Russ J Nondestruct Test 44, 634–638 (2008). https://doi.org/10.1134/S1061830908090076
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DOI: https://doi.org/10.1134/S1061830908090076