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。
It was shown that crack growth rate increased as the temperature or limit load rate increased. It was also that crack growth 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。
Then, the generic upper limit of EIFS distribution and crack growth parameter under different stress levels are estimated with constrained least squares fitness.
然后利用约束最小二乘法确定不同应力下的裂纹扩展参数和通用EIFS分布上限。
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