Похибки передачі відносних деформацій у тензометричному пристрої при підвищеній температурі

The subject of study in this article is the distribution of relative deformations in the system of the strain gauge used in the study. This study aims to identify factors and study their influence on the accuracy of measuring relative deformations. Task: to conduct a simulation of the distribution of deformations to assess the distortions caused by the ineffective transfer of stresses through the bonding layer, and to study the influence of design factors on the measurement error. Obtaining reliable data and making adjustments from a strain gauge of increased thickness operating in high-temperature conditions. Method for solving the problem: computational and analytical. Thus, the results of the computational experiment demonstrate the high efficiency of the developed strain gauge device, particularly under significant temperature gradients. The key factor ensuring this efficiency is not only a stable strain transfer coefficient, which minimizes the influence of external factors on the accuracy of measurements, but also effective leveling of the thermally caused additive error. This process is achieved by the mutual arrangement of strain gauges and the use of a high-temperature insulator-connector material. The obtained data emphasize the potential of using the device in environments with unstable thermal conditions, where accurate deformation measurements are critical for ensuring reliable operation and monitoring the condition of the parts under study. Conclusions. The deformation characteristics of the strain gauge device installed on the part model were investigated using computational experiment methods when heat flow was applied and loaded. The sensitive elements perceive the deformation from the part at the level of 96%. The research results have theoretical and practical significance for increasing the accuracy of research at elevated temperatures and the possibility of making corrections to the measurement results if necessary. Further research and improvement of the strain gauge device are proposed, and the advantages of the used technical solution are analyzed.