含缺口的复合材料层合板疲劳寿命预测OA

Fatigue life prediction of notched structures often requires consideration of the effect of stress gradients present in the vicinity of the notch.Direct application of the stress field intensity method,which is widely used for metallic materials,to predict the fatigue life of notched composite laminates results in significant errors.Therefore,this paper proposes a two-dimensional planar vector stress field intensity method(ETEVM)and an improved three-dimensional spatial vector stress field intensity method(CTSVM')to predict fatigue strength and fatigue life,and Simulation verification shows that the prediction accuracy of both methods is higher than that of the classical one-dimensional stress field intensity method(COSFI).The'CTSVM'prediction error falls within twice the error band,demonstrating that the improved method can be effectively used for fatigue life prediction.