METHOD OF NON-DESTRUCTIVE TESTING OF PRODUCTS FROM THERMO- AND RESET PLASTICS

Abstract

Currently, due to the rapid development of technology and the advent of new modern materials, the task of ensuring high quality products becomes a priority. Non-destructive testing methods play a key role in ensuring the safety and reliability of machinery and equipment. This paper describes the main areas of application of products made from composite polymer materials. The main advantages, unique properties and disadvantages are determined. Possible technological and operational defects in such products as polyamide axle box separators and composite brake pads of a freight car are described. Such modern methods of non-destructive testing as radiography, ultrasonic and capillary methods are considered. Particular attention is paid to the visual control method. The article explains why these methods are not effective in modern production processes. The purpose of the work is to study the possibility of using high-frequency radiation with a resolved frequency of 27.12 MHz for monitoring linear and spatial polymers. When organizing non-destructive testing using the high-frequency method, special attention is paid to temperature effects. The paper describes the effect of high-frequency radiation on a test object made of composite materials. An explanation is given of the mechanism for the formation of microdischarges in places where defects form. The equivalent circuit and equivalent circuit are presented. The work analyzes the intensity of microdischarge formation and pulse length, depending on the size and location of the defect. Conclusions and tasks for further research are presented.