High-temperature total stress-strain curve testing method and device based on optical fiber

Abstract

The invention relates to the technical field of optical fiber detection, in particular to a high-temperature total stress-strain curve testing method and device based on an optical fiber, and the method comprises the steps: carrying out a tensile experiment of a preset tensile rate on an optical fiber test part at different temperatures; obtaining a tension load applied to the optical fiber test part at each temperature and the cavity length of an optical fiber sensor in the optical fiber test piece at each temperature; and calculating the stress and strain at each temperature according to thetension load at each temperature and the cavity length of the optical fiber sensor in the optical fiber test part, and performing fitting to obtain a stress-strain curve. According to the technical scheme of the embodiment of the invention, the optical fiber test part is subjected to tensile experiments at different temperatures; and the stress-strain of the optical fiber sensor at each temperature is calculated according to the obtained cavity length and tension load, so accurate data can be provided for stress-strain analysis of the optical fiber sensor at different temperatures, and the actual stress-strain of the optical fiber sensor in different temperature environments can be truly measured.

Description

technical field [0001] The present disclosure relates to the technical field of optical fiber detection, in particular, to a method and device for testing a high temperature full stress-strain curve based on an optical fiber. Background technique [0002] Optical fiber sensing technology has developed rapidly and has been widely used in railways, ships, aerospace, coal mines and other projects. In the field of high-temperature materials, it is also an urgent problem to truly measure the actual stress and strain of the structure in the high-temperature environment. [0003] At present, the analysis of high temperature stress and strain is mostly based on theoretical calculations and computer simulations, lacking accurate stress measurement data as a support, which will cause large measurement errors. [0004] Therefore, it is necessary to design a new high temperature full stress-strain curve testing method and device based on optical fiber. [0005] It should be noted that...

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Problems solved by technology

[0006] The purpose of the present disclosure is to provide an optical fiber-based high-temperature full stress-strain curve testing method and device, a computer-readable storage medium, and electronic equipment, so as to overcome the lack of accurate stress measurement data in related technologies at least to a certain extent as a support, This will create a large measurement error problem

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