Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

Personal portfolio

APPLICATION OF DISCRETE WAVELETS-DECOMPOSITION METHOD TO ANALYSIS PARAMETERS OF ACOUSTIC EMISSION AT DESTRUCTION OF ALUMINUM ALLOYS

Dmitriev A.A. 1, 2, 3
1 Altai State University
2 Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences
3 National Research Tomsk Polytechnic University
Proposed and tested a new method of analysis of acoustic emission signals in which the scatter signal values, calculated by dividing into equal blocks of time, is used as one of the relevant characteristics of the acoustic emission. Describes the instructional methods of removing noise of acoustic emission signals based on the analysis of the coefficients of multilevel wavelet-decomposition. The research was undertaken, and it describes the results of analysis of acoustic and deformation effects in aluminum alloys. The accordance of acoustic emission signals and turn the deformation curve was noted. Shown that the timebase of standard deviations of the purified signal allows to control the development process of the destruction of material. The development of this method has the prospect for using as a method of nondestructive control of materials working under heavy loads directly during operation.