Damage analysis of wind turbine blade with different stacking parameters

Considering the damage and failure of wind turbine blades under gravity, centrifugal force and aerodynamic load, the influence of blade laminating parameters to the damage characteristics of wind turbine blades is studied. Different stacking schemes were designed by changing the stacking angle, stacking sequence and the ratio of ± Xn in the material. The maximum stress position of the blade was analyzed. At the same time, the failure factor of Tsai_Wu was used as the failure criterion to analyze the possibility of blade failure. The results show that the maximum stress of the blade appears at the junction of the leading edge web and the airfoil near circular airfoil and DU_35A17 airfoil; in the range of 40° ∼ 50°, as the layup angle increases, the blade Tsai_Wu failure factor shows a downward trend. On both sides of about 45°, the change trend of the Tsai_Wu failure factor is different with the increase of ± Xn thickness ratio; the Tsai_Wu failure factor of the blade material is greatly affected by the stacking angle and the thickness ratio of ± Xn .