FIELD: measuring technology.
SUBSTANCE: inventions group relates to the field of measuring technology and can be used to assess the reliability of products made of polymer composite materials (PCM), including those with metal layers, based on the results of monitoring the amount of deformation when they are loaded with a static or dynamic load. The method includes determining the initial spectral position of the Bragg grating peaks, placing an optical fiber with Bragg gratings along the entire structure between monolayers of a composite material susceptible to mechanical deformation during its manufacture, after manufacturing, re-measuring the spectral position of the Bragg grating peaks and determining the total value arising in as a result of mechanical and thermal effects, deformation of the structure by measuring the spectral position of the peaks of the Bragg gratings. Using thermographic equipment, the temperature field of the outer area of the surface of the controlled structure is separately measured in the area where the optical fiber with Bragg gratings is located. The temperature field of the structure is calculated in the inner region of the location of the mentioned optical fiber according to the measured results of the temperature field of the outer surface area. Taking into account the calculated temperature field in the inner region and the temperature field of the outer section of the surface of the structure, the component of the deformation from the force load and the deformation from the internal temperature are separated from the total deformation.
EFFECT: increasing the accuracy of determining the internal deformation of products under load, increasing the reliability of detecting local areas of reduced strength, increasing the reliability of the results of assessing the technical and operational state of complex structures and their elements from PCM.
4 cl, 5 dwg
