Abstract: With the development of offshore and onshore wind power with low wind speed, the length and root diameter of the wind turbine blade increase rapidly, resulting in the problem of large blade root infusion crazing grain. The results show that the problem of blade root infusion crazing mainly occurs in the resin infusion curing process. In this paper, by studying and adjusting the internal stress of resin infusion and curing at the root of blades, the internal stress release during the post-curing process of blades is slowed down, and the problem of blade root crazing is effectively solved.

Key words: wind turbine blade, infusion, crazing, composites