Abstract
The Weibull distribution is used to calculate the probability of failure of any type of system. In the case of the fracture of metal, the squared critical stress is taken as the random variable and the fractal dimension as the form parameter. Fluctuations of the critical stress intensity at the prefracture stage are accompanied by an acoustic response (acoustic emission). It is concluded that information about the acoustic emission intensity (amplitude criterion) is not enough to calculate the probability of spontaneous failure. It is also necessary to take account of the temperature and fractal dimension of the prefracture region. It is proved that the fractal dimension can be determined from the acoustic emission spectrum.
The results of a determination of the instantaneous probability of spontaneous failure of samples of corrosion-resistance steel on the basis of acoustic emission spectroscopy are presented.
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Translated from Atomnaya Énergiya, Vol. 102, No. 6, pp. 351–358, June, 2007.
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Krylov, V.A. Determination of the probability of spontaneous fracture of metal from the acoustic emission spectrum at the prefracture stage. At Energy 102, 436–444 (2007). https://doi.org/10.1007/s10512-007-0069-0
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DOI: https://doi.org/10.1007/s10512-007-0069-0