Composite material capable of sensing external stress in real time in wide temperature range, preparation method and application

Abstract

The invention discloses a wide-temperature-range composite material capable of sensing external stress in real time. The wide-temperature-range composite material comprises a temperature measuring grating, a strain grating and a demolding layer, the temperature measuring grating is arranged in the substrate, the demolding layer wraps the temperature measuring grating and the outer sides of the reinforcing layers adjacent to the temperature measuring grating, the demolding layer is used for preventing strain from being transmitted to the temperature measuring grating, and the temperature measuring grating is used for obtaining temperature information in the substrate; and the strain grating is arranged in the substrate and is used for acquiring temperature information and strain information in the substrate. The invention also discloses a preparation method and application of the composite material. According to the invention, the temperature measurement grating and the strain grating are implanted into the composite material, so that the strain and temperature in the composite material can be accurately measured, and a new solution is provided for material performance monitoring and structural health management in the fields of aerospace, automobile industry, structural engineering and the like.

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