3 , analyzing the stress field of the aero - engine case under the given loads , the fatigue life of the case is predicted through the presented fatigue model and the method of " nominal stress " 用該模型對孔徑為5mm層合板的s ? n曲線進行疲勞壽命預測及試驗驗證。 3 、首次對某型發(fā)動機t300 kh - 304復合材料機匣的主鋪層在給定工況下的疲勞壽命進行預測。