Abstract
Based on the characteristics of electrical anisotropy of carbon fiber reinforced polymer materials, a 3D finite element model for detecting the delamination defect of carbon fiber reinforced polymer materials by eddy current method is established with COMSOL Multiphysics software. By simulating the effects of different frequencies on the coil detection voltage in the presence of delamination defects, the optimal detection frequency was determined. Then aiming at the fiber delamination defects with different radius and thicknesses, the change rule of corresponding detection voltage is analyzed. The results show that when the detection frequency is 2200Hz, the detection coil has the highest sensitivity to the delamination defects, and the detection voltage has a good linear correlation with the radius and thickness of the delamination defects. This conclusion provides theoretical support for the quantitative analysis of the delamination defects in carbon fiber reinforced polymer by eddy current testing.
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