Pochapskyy Y. Methods and devices for testing of fracture of materials using low power emission signals

The object of study is low power emission diagnostic signals that occur during deformation and fracture of solids or when they are exposed to other physical factors. The goal - to develop methods and tools for the selection and processing of low power emission diagnostic signals and create using this basis technical devices and control systems of destruction and diagnostics of materials and structural elements. Applied methods of probability and stochastic processes, mathematical statistics, theory and methods of calculation of information-measuring systems. Developed the generalized mathematical model of low power emission signals. Developed models of the acoustic and light emission signals at the output of the corresponding primary converters. Developed new methods for detecting and isolating signals of acoustic and light emission on the background noise. Created new and were further developed the existing methods of signal processing of acoustic and light emissions. Created information-measuring systems for monitoring and diagnosis of fracture state of materials using acoustic and light emission signals. Using created tools there was implemented AE-diagnostics of state of bridges over the rivers Dnister and Dnipro, oil stations of JSC "Ukrtransnafta" and so on. Created as a result of work methods and technical means can be used in designer, engineering and scientific centers that are dealing with the problems of control of destructive testing of materials, including: ANTK "Antonov", KB "Pivdenne", JSC "Ukrtransgas", branch "Main oil pipeline "Druzhba", JSC "Ukrtransnafta", specialized expert technical center company "Dialab" and others.