Radial fretting is defined as the damage caused by the relative motion of a ball under a variable normal load. The conducted experimental tests proved the existence of this damage even in contacting bodies with similar materials and elastic properties; however, the reviewed analytical methods do not predict damage under these conditions, and the numerical methods are time-consuming, especially when the investigation requires the analysis of several loading cases or during large number of cycles. The main objective of this work was to develop a fast analytical method to analyse radial fretting wear. For this purpose, a novel formulation for contact displacements under a normal variable load was built and merged to different contact mechanic formulas. For validation purposes, false brinelling in thrust bearings was used as a representative industrial example. The results were compared with a FEM model showing a relative difference under 9% and a massive reduction of the calculation time of more than 30 000 times, moreover experimental tests were carried out, showing a good agreement between the density of friction energy and the obtained fretting damage what endorse the use of this formulation for the analysis of a large number of cycles and loading cases.

径向微动被定义为在可变法向载荷下由球的相对运动引起的损坏。进行的实验测试证明，即使在具有相似材料和弹性特性的接触体中也存在这种损伤；然而，经过审查的分析方法并不能预测这些条件下的损坏，而且数值方法非常耗时，特别是当调查需要分析多个载荷情况或大量循环时。这项工作的主要目标是开发一种快速分析方法来分析径向微动磨损。为此，建立了一种在法向可变载荷下接触位移的新公式，并将其合并到不同的接触力学公式中。出于验证目的，推力轴承中的假压痕被用作具有代表性的工业示例。结果与有限元模型进行比较，显示相对差异在 9% 以下，计算时间大幅减少 30 000 多倍，此外还进行了实验测试，表明摩擦能密度与所获得的结果吻合良好。微动损伤是什么支持使用该公式来分析大量循环和载荷情况。