Fatigue damage estimation 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。
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；
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.
采用焊点疲劳寿命预估方法，通过有限元分析并结合应力计算，即可计算出实际载荷工况下的焊点疲劳损伤。
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