METHODOLOGICAL APPROACHES TO DETERMINING THE CHARACTERISTICS OF EQUIPMENT FOR RECORDING INTERNAL STRESS CONCENTRATORS IN COMPOSITE MATERIALS BASED ON THE ANALYSIS OF DYNAMIC TEMPERATURE FIELDS

One of the problems of assessing the quality and reliability of composite structures (CM) is the need to detect, localize and identify internal stresses that affect the reliability of products both at the stage of their manufacture and during operation. Currently, traditional methods of non-destructive testing, as a rule, identify and identify defects such as violations of the internal continuity of the material, having an interface between the media. The proposed article suggests an approach to detecting "implicit" defects (microcracks in the binder, fiber breaks, etc.) that occur, as a rule, when force loads are applied to the structure during testing or operation, i.e. before the appearance of discontinuity of the material. This will allow, firstly, to determine the places of stress concentration - potentially dangerous areas where damage is possible, and secondly, to determine the places of destruction of products without bringing the products themselves to destruction. This article presents the results of research and the development of methodological approaches to determining the parameters of advanced and informative thermal control equipment using the example of detecting internal stress concentrators based on modeling thermal processes in a material and analyzing one type of radiation, dynamic infrared fields. Examples of equipment parameters are given based on the calculation of dynamic temperature fields in a material when a power load is applied due to the manifestation of internal stress concentrators and the choice of the most acceptable real monitoring equipment.