A fracture mechanics life prediction methodology applied to dovetail fretting
A fracture mechanics life prediction methodology applied to dovetail fretting
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DOI：
10.1016/j.triboint.2006.02.006
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发表时间：
2006-10
影响因子：
6.2
通讯作者：
Patrick J. Golden;J. Calcaterra
中科院分区：
文献类型：
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作者：
Patrick J. Golden;J. Calcaterra
这项工作评估了基于断裂力学的燕尾微动疲劳实验室实验的裂纹扩展寿命预测方法。Ti-6Al-4V样本配置成35°、45°和55°角。在R为0.1和0.5的情况下，使用恒定振幅载荷进行实验，寿命范围为100，000至1000万次循环。该方法包括从有限元法计算的接触载荷和体应力作为应力和寿命分析的输入。使用接触应力分析软件卡普里计算接触应力。这些应力被输入到接触边缘的应力强度因子计算中。裂纹扩展寿命计算从一个假设的初始裂纹尺寸。分析表明，扩展消耗了大部分的总寿命，是不敏感的初始裂纹尺寸的大范围。
This work evaluates a fracture mechanics based crack growth life prediction methodology for dovetail fretting fatigue laboratory experiments. The Ti–6Al–4V specimens were configured with angles of 35°, 45° and 55°. Experiments were conducted with constant amplitude loading at R of 0.1 and 0.5 with lives ranging from 100,000 to 10 million cycles. The approach included the contact loads and bulk stress calculated from the finite element method as inputs to the stress and life analysis. Contact stresses were calculated using the contact stress analysis software CAPRI. These stresses were input into a stress intensity factor calculation at the edge of contact. Crack propagation life was calculated from an assumed initial crack size. Analysis showed that propagation consumes a majority of the total life and is insensitive to a large range of initial crack sizes.