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Stress Field Evolution in a Ball Bearing Raceway Fatigue Spall

机译:滚珠轴承滚道疲劳剥落中的应力场演化

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The governing mechanisms of fatigue spall propagation in ball bearing inner raceways are investigated through the use of elastic-plastic finite element modeling, X-ray diffraction, and the visual inspection of fatigue spall cracks. The model simulates multiple ball impacts with a fatigue spall's edge in a 208 size ball bearing operating at 10,000 rpm. Ball impacts are shown to cause severe plastic deformation within the spall edge and induce tensile residual stresses. The finite element results are supported by X-ray diffraction measurements and the locations of cracks observed around the edge of a spall.
机译:通过使用弹塑性有限元建模,X射线衍射和肉眼观察疲劳剥落裂纹,研究了滚珠轴承内滚道中疲劳剥落传播的控制机制。该模型在10,000 rpm下运行的208尺寸的球轴承中模拟带有疲劳剥落边缘的多个球撞击。球撞击显示出在剥落边缘内引起严重的塑性变形并引起拉伸残余应力。有限元结果由X射线衍射测量和在剥落边缘周围观察到的裂纹位置支持。

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