fracture and damage mechanics

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。

The physical meanings of the formula presented are explained from the standpoint of submacroscopic fracture mechanics and damage mechanics.

从细观断裂力学和损伤力学的观点出发，解释了该规律的物理意义。

Finally, the methods for calculating fatigue life based on fracture mechanics for welded node and cumulative damage theory for bolted sphere node respectively have been presented.

本文在大量实验的基础上提出了对焊接节点采用断裂力学的方法和对螺栓球节点应用累积损伤理论估算它们疲劳寿命的计算方法。