METHOD FOR DETERMINING ELASTIC CONSTANTS OF MATERIAL OF DIFFERENT MODULI Russian patent published in 2023 - IPC G01B5/30 

FIELD: measuring technology.

SUBSTANCE: invention relates to the methods for determining the elastic constants of a material of different moduli. The method consists in loading the sample with a bending moment according to the four-point bending scheme. In this case, a sample of equal cross-section along the length is made, two pairs of fibre-optic strain sensors on Bragg gratings are installed on opposite surfaces symmetrically and parallel to each other, each pair is glued with an intersection at a right angle in the centre of the sample surface. Using an interrogator, strain values are taken from each sensor on the tensile and compressed surfaces of the sample along the length of the sample and along the width of the sample. Based on the obtained strain values, Poisson's ratios and elastic moduli on the tensile and compressed surfaces of the sample are determined using the formulas.

EFFECT: increasing the accuracy of measuring deformations and expanding the functionality of the method.

1 cl, 1 dwg, 2 tbl