Diagnostics of Fracturing of Structural Materials Based on Parameters of Electromagnetic Radiation Signals

摘要

The methodological aspects and results of experimental studies allowing for remote evalu-ation of the integrity of structural materials under loading using the method of electromagnetic emis-sion (EME) are considered. It is known that in the process of loading different materials systems of cracks that are formed in them emit acoustic and electromagnetic signals. Based on signal parameter variations, it is possible to predict an oncoming moment of disruption of their integrity. The EME is a remote method and does not require direct contact with an object under study, be it rock specimens or metal articles. It is proposed to use it for testing the integrity of metal articles. The first results of diag-nostics of the integrity of metal rings made of different materials (steels, duraluminum, zirconium, and copper) using sensing devices, namely antennas of electrical and magnetic types, are presented. It is shown that when loaded different types of materials emit EME signals of different amplitudes whose level substantially exceeds the level of external disturbances and internal equipment noises. It is pro-posed to evaluate the integrity of different metal articles, especially those in nooks, based on increased amplitudes of EME signals.