Fatigue damage estimation of the tendons was made using fracture mechanics approach, establishing the fracture crackgrowth 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
It was shown that crackgrowth rate increased as the temperature or limit load rate increased. It was also that crackgrowth rate decreased as rubber thickness and loading rate increased.
结果表明，循环载荷下的裂纹扩展速率对试验频率、载荷比、温度及橡胶夹层厚度反映较敏感。
3
Then, the generic upper limit of EIFS distribution and crackgrowth parameter under different stress levels are estimated with constrained least squares fitness.