Abstract This paper proposes a new methodology for fretting fatigue life assessment. It uses a combination of multiaxial fatigue criteria, the theory of critical distances and a node-displacement wear algorithm to account for the initiation life under fretting. Further, the extended finite element method is considered to compute the propagation life. A new method is also introduced to predict the crack propagation path under nonproportional loading conditions. To validate the analysis, available fretting fatigue data using an Al 2024-T3 alloy was considered. All the total lives estimated by the proposed approach fell within a scatter band 2, with an error between 11% and -39%. An analysis of the energy dissipated on the contact surface was performed and showed that for certain cases the inclusion of wear in the modelling of the problem is indeed essential to obtain more accurate fretting fatigue life assessments.

中文翻译：

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微动磨损过程对疲劳裂纹扩展及寿命评估的影响

摘要 本文提出了一种新的微动疲劳寿命评估方法。它结合使用多轴疲劳标准、临界距离理论和节点位移磨损算法来计算微动下的起始寿命。此外，考虑扩展有限元方法来计算传播寿命。还引入了一种新方法来预测非比例加载条件下的裂纹扩展路径。为了验证分析，考虑了使用 Al 2024-T3 合金的可用微动疲劳数据。所提出的方法估计的所有总寿命都落在散射带 2 内，误差在 11% 到 -39% 之间。