Romanowicz Paweł J, Szybiński Bogdan
Institute of Machine Design, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland.
Materials (Basel). 2019 Jan 24;12(3):371. doi: 10.3390/ma12030371.
The rolling bearings used in various industrial applications are exposed to fatigue failure during their operation. Generally, in a practical application, the ISO 281:2007 standard is used for fatigue life assessments of rolling bearings. The application of the formula given in this standard requires knowledge concerning the basic dynamic load rating . The natural question is raised of whether it is possible to omit the time-consuming experimental tests while still effectively calculating the fatigue load or the load capacity of the bearings. In the paper, the authors propose the application of analytical formulas for stresses in the contact area and its vicinity, and the usage of the multiaxial high-cycle fatigue hypothesis to estimate the maximal fatigue load for the rolling bearings. In the proposed methodology, only the knowledge concerning the fatigue properties of the material and geometry characteristics of the analyzed bearings are demanded. The effectiveness of the authors' proposal is verified for arbitrarily chosen bearings. The observed discrepancy between the catalogue fatigue load (SKF catalogue) and numerically calculated fatigue load usually does not exceed 10%, which is fully acceptable from an engineering point of view and justifies the approach proposed in the paper. The proposed methodology can be used for the prediction of the fatigue life and optimization of the rolling bearings.
各种工业应用中使用的滚动轴承在运行过程中会面临疲劳失效。一般来说，在实际应用中，ISO 281:2007标准用于滚动轴承的疲劳寿命评估。应用该标准中给出的公式需要了解基本动态额定载荷。自然而然会提出一个问题：是否有可能在不进行耗时的实验测试的情况下，仍然有效地计算轴承的疲劳载荷或承载能力。在本文中，作者提出应用接触区域及其附近应力的解析公式，并使用多轴高周疲劳假设来估算滚动轴承的最大疲劳载荷。在所提出的方法中，只需要了解材料的疲劳性能和所分析轴承的几何特征。作者的提议的有效性针对任意选择的轴承进行了验证。观察到的目录疲劳载荷（SKF目录）与数值计算的疲劳载荷之间的差异通常不超过10%，从工程角度来看这是完全可以接受的，并且证明了本文所提出方法的合理性。所提出的方法可用于预测滚动轴承的疲劳寿命并对其进行优化。
