High-performance optical-fiber built-in intelligent composite material and preparation method thereof

Abstract

The invention discloses a high-performance optical-fiber built-in intelligent composite material with an engineering structure strengthening function and a sensing function and a preparation method thereof. According to the high-performance optical-fiber built-in intelligent composite material and the preparation method thereof, optical fiber gratings are coated with polymers, the outer layers of grid areas of the optical fiber gratings are coated with high-temperature resistant resin adhesive coatings, after the optical fiber gratings are protected by the coatings, resin adhesive films are arranged outside the optical fiber gratings to conduct pre-fixation, the leading-out tail fiber portions of optical fibers are sleeved with tail-fiber protection sleeves, therefore, it can be ensured that the optical fiber gratings are embedded reliably in arbitrary directions and among arbitrary layers in the composite material, it is guaranteed that spectra of the optical fiber gratings do not distort, the compatibility and mechanical matching performance of the optical fibers and the composite material are improved, the survival rate of the built-in optical fiber gratings is significantly increased, and the service life of the built-in optical fiber gratings is significantly prolonged; on the basis of completing the functions of engineering structure strengthening and reinforcing, the prepared intelligent composite material can be used for measuring the tensile compression and bending of key areas and has excellent popularization and application value.

Description

technical field [0001] The invention relates to the field of optical fiber intelligent composite material and structure manufacturing, in particular to a high-performance optical fiber built-in intelligent composite material with engineering structure reinforcement and sensing functions and a preparation method thereof. Background technique [0002] In large-scale projects, such as bridges, tunnels, dams and other buildings, as the operating time increases, material aging, environmental corrosion, and natural disasters cause damage to large structures or a reduction in structural bearing capacity, resulting in potential safety accidents. Fiber-reinforced resin-based composite materials have the advantages of light weight, high strength, good corrosion resistance, good elastic properties, good design, insulation, heat insulation, electromagnetic wave resistance, non-magnetic conductivity, and small thermal expansion coefficient. It has great advantages in structural reinforce...

AI Technical Summary

Problems solved by technology

However, fiber gratings still have problems such as radial stress and non-uniform stress caused by different fiber laying directions, such as spectral distortion, double high refraction phenomenon or spectral broadening. Increase the degree of fiber damage and slippage, affecting the life of the fiber and the accuracy of subsequent detection

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