Strain transfer efficiency model and finite element simulation experiment for end-bonded substrate-type FBG sensors (opens in new tab)

FBG sensors are widely used in damage monitoring of wind turbine blades. Due to the adhesive layer, strain transfer loss occurs when blade strain is transmitted to the fiber Bragg grating. This paper proposes a strain transfer efficiency model for the end-bonded method of substrate-type FBG sensors, and conducts numerical analysis on the elastic modulus, Poisson’s ratio, and thickness of the bonding adhesive layer, as well as the gauge length of the FBG sensors. Finally, finite element simula...