The deformation velocity caused by viscoelasticity is one of the drives of the Lubrication flow field and significantly influences the mixed lubrication and wear characteristics of journal bearings under dynamic loads. However, research considering the deformation velocity has yet to be reported. To address this research gap, we defined three-dimensional (3D) deformation velocities to amend the bearing surface velocity and proposed its calculation method based on the derivative function of the temporal association deformation equation and the finite element method. Therefore, a new mixed visco-elastohydrodynamic lubrication model amended by 3D deformation velocities was built and a nested solution method was proposed in which the sub-iterative process for deformation velocities was embedded into the oil film pressure iterative process. Furthermore, the lubrication model was coupled with the Archard model to predict wear. The viscoelastic parameter of the bearing was experimentally measured, and numerical simulations of lubrication and wear were performed for an ordinary bearing under a simple dynamic load and for the crankshaft main bearing of an internal combustion engine (ICE) under impact. The simulation results indicate that the deformation velocities reduce the extrusion effect and increase the contracting effect in the lubrication flow field. This enables the new model to identify the micro asperity contact, impact, and early wear features of bearings more accurately than the traditional mixed lubrication model. In addition, an increase in the ICE load intensifies the early wear of the bearing.

中文翻译：

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通过变形速度修正的粘弹流体动力润滑和磨损模型


粘弹性引起的变形速度是润滑流场的驱动力之一，显着影响动载荷下径向轴承的混合润滑和磨损特性。然而，考虑变形速度的研究尚未见报道。为了解决这一研究空白，我们定义了三维（3D）变形速度来修正轴承表面速度，并提出了基于时间关联变形方程的导数函数和有限元方法的计算方法。因此，建立了一种新的由3D变形速度修正的混合粘弹流体动力润滑模型，并提出了一种将变形速度的子迭代过程嵌入到油膜压力迭代过程中的嵌套求解方法。此外，润滑模型与 Archard 模型相结合来预测磨损。通过实验测量了轴承的粘弹性参数，并对普通轴承在简单动载荷作用下和冲击作用下的内燃机曲轴主轴承进行了润滑磨损数值模拟。模拟结果表明，变形速度减小了润滑流场中的挤压效应并增加了收缩效应。这使得新模型能够比传统的混合润滑模型更准确地识别轴承的微粗糙接触、冲击和早期磨损特征。此外，ICE负载的增加加剧了轴承的早期磨损。