Abstract Foreign object damage (FOD) tests and high-cycle fatigue (HCF) tests were carried out for Ti-17 titanium alloy simulation blades. The results showed that damage notches could be divided into semicircular and deflection types. The HCF strength of deflection-type specimens was lower than that of semicircular-type specimens. FOD and fatigue properties were characterized by scanning electron microscopy. The extrusion zone of deflection notches was inclined, reducing the fatigue strength compared with semicircular notches. A back-propagation neural network-based method for predicting the HCF strength of FOD simulation blades was developed, for which the prediction error was small.

中文翻译：

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异物损伤后Ti-17合金叶片高周疲劳强度的预测

摘要 对Ti-17钛合金仿真叶片进行了异物损伤（FOD）试验和高周疲劳（HCF）试验。结果表明，损伤缺口可分为半圆型和偏转型。挠曲型试样的 HCF 强度低于半圆型试样。FOD 和疲劳性能通过扫描电子显微镜进行表征。偏转槽口挤压区倾斜，与半圆形槽口相比，疲劳强度降低。开发了一种基于反向传播神经网络的 FOD 模拟叶片 HCF 强度预测方法，预测误差较小。