Keyword: «crack tip»

The necessity of studying the dependence between the acoustic emission (AE) total count emanating from the crack tip and the stress intensity factor (SIF) is substantiated. A hypothesis is proposed that the distribution of the density of AE sources at the crack tip is uneven, has a probabilistic nature and is described by the Weibull distribution. The density distribution of AE sources at the crack tip is modeled, and the AE total count predicted by this model under primary quasi-static loading is calculated. It is shown that the proposed intensity distribution of AE sources at the crack tip leads to a relationship between the AE total count and SIF that is closer to the experimental data. Examples of calculations are given according to the proposed model, the results of which indicate the presence of a clear dependence of the exponent in the expression of the number of AE acts on the SIF on the presence of the given in this paper or similar spatial distribution of the density of AE sources.