Abstract: This paper studies the interface performance of carbon fiber and glass fiber composite materials for large-scale wind turbine blades, which is greatly affected by the test method, the material of the peel ply, and the gram of the peel ply. Comparing with the interlaminar shear test which is commonly used in evaluating interfacial bonding performance, the T-peel test method can better reflect the interfacial bonding performance and change trend of the interfacial bonding performance. Based on the T peel test method, it was obtained that the carbon/glass interface bonding performance treated with nylon peel ply was better than that of polyester peel ply, and the large-gram nylon peel ply was the highest. Finally, according to the mechanism of carbon/glass interface bonding performance influence mechanism, interface failure mode, and microstructure analysis, the conclusions are consistent with the T test results, which provide a basis for evaluating the carbon/glass interface bonding performance and help us to select a suitable test method and peel ply.

Key words: wind turbine blade, carbon/glass interface, peel strength, peel ply, composites