A METHOD FOR THE IDENTIFICATION OF THE TYPES OF MACROFRACTURE OF STRUCTURAL MATERIALS BY THE PARAMETERS OF THE WAVELET TRANSFORM OF ACOUSTIC-EMISSION SIGNALS

摘要

We study the specific features of acoustic-emission signals accompanying the macrofractures of materials with different structures. For this purpose, we use the results of the analysis of the local features of acoustic-emission signals by using their continuous wavelet transforms. According to the criterion used for the identification of the types of macrofracture, we analyze brittle, ductile-brittle, and ductile fractures. We also establish the typical differences between signals according to the frequency bandwidth, duration of emission, and changes in the values of predominant frequency.