通过有限元分析,分别采用峰值应力法和应力梯度法对两种尺寸、三种应力水平下的起落架凸耳的疲劳寿命进行预测,并和试验结果进行了对比。结果表明,在低应力集中区,峰值应力法能给出准确的预测结果;而在高应力集中区,应力梯度法能预测更准确。 Through the finite element analysis, the fatigue life of the landing gear lugs at two sizes and three stress levels were predicted by the peak stress method and the stress gradient method, respectively, and compared with the experimental results. The results show that in the low stress concentration area, the peak stress method can give accurate prediction results, while in high stress concentration areas, the stress gradient method can predict more accurately.