Fatigue damageestimation of the tendons was made using fracture mechanics approach, establishing the fracture crack growth rate model and limit state equations for failure modes.
疲劳寿命的计算采用断裂力学方法，建立疲劳裂纹扩展模型和失效模式的极限状态方程。
2
Stochastic fatigue, chaotic fatigue and the fatigue life estimation of the composite material are three important aspects in fatigue research. The fatigue damage probability distribution was given.
随机疲劳、混沌疲劳及复合材料疲劳寿命估算属疲劳学研究的三个重要前沿．给出了疲劳损伤的动态概率分布；
3
With the welding spot fatigue lifetime pre-estimation method, by combination of the finite element analysis and stress calculation, the welding spot fatigue damage under actual load can be calculated.