Abstract Wear of revolute joints critically influences the service life and maintenance of certain types of machinery. As a result, many methods have been developed to investigate the wear of revolute joints based on the assumption of either dry contact or full-film lubrication. However, in real applications, a revolute joint may operate under different lubrication conditions during its lifecycle. In this paper, a hybrid model is proposed for wear prediction of a single revolute joint that may experience different lubrication conditions. Three lubrication conditions are considered: full-film lubrication, boundary lubrication, and dry contact. A time-varying wear coefficient is introduced to represent these different lubrication conditions. In our hybrid model, the Archard wear model is used. An adaptive finite element model is used to perform wear simulation of a single revolute joint by continuously updating the contact nodes. In the finite element model, two friction coefficients are used to take into account the change of lubrication conditions. To achieve more accurate predictions and reduce uncertainties of the wear coefficient, the Bayesian updating method is implemented using experimental wear data. The proposed approach is tested using wear experiments of a revolute joint used in an airplane cabin door. The journal material in this experiment is 0.45C steel and the bearing material is brass H58. A comparative study was also conducted between the proposed approach and two other methods. Results show that the proposed approach can more accurately predict the remaining useful life of a single revolute joint.

中文翻译：

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考虑时变润滑条件的单个旋转接头磨损预测混合模型

摘要 旋转接头的磨损严重影响某些类型机械的使用寿命和维护。因此，已经开发了许多方法来基于干接触或全油膜润滑的假设来研究旋转接头的磨损。然而，在实际应用中，旋转接头在其生命周期中可能会在不同的润滑条件下运行。在本文中，提出了一种混合模型来预测可能经历不同润滑条件的单个旋转接头的磨损。考虑了三种润滑条件：全油膜润滑、边界润滑和干接触。引入了随时间变化的磨损系数来表示这些不同的润滑条件。在我们的混合模型中，使用了 Archard 磨损模型。自适应有限元模型用于通过不断更新接触节点来执行单个旋转关节的磨损模拟。在有限元模型中，采用两个摩擦系数来考虑润滑条件的变化。为了实现更准确的预测并减少磨损系数的不确定性，使用实验磨损数据实施贝叶斯更新方法。使用飞机舱门中使用的旋转接头的磨损实验对所提出的方法进行了测试。本实验轴颈材料为0.45C钢，轴承材料为黄铜H58。还对所提出的方法和其他两种方法进行了比较研究。结果表明，所提出的方法可以更准确地预测单个旋转接头的剩余使用寿命。