The use of roller bearings as crankshaft main bearings has shown potential in reducing the fuel consumption of internal combustion engines. An effective way to mount the roller bearing onto the crankshaft is to split the outer ring. However, this may lead to a severe out-of-roundness in the split region when the bearing is mounted, further implying increased noise, vibrations and contact stresses. In this work, a novel approach to study the plasto-elastohydrodynamic contact using commercial finite element software is developed. The modelling approach is based on the contact moving in space, allowing for the stress history based on the lubricant pressure to be studied in a straight-forward manner. The model is first utilised to study the influence of asperities on the lubricating conditions, indicating that stresses may exceed the yield strength of the material due to the transient effects taking place when the surface feature is over-rolled. Thereafter, the model is used to analyse the step in a mounted crankshaft roller bearing with the purpose of specifying a critical step height, which implies zero plasticity and thereby a reduced risk of accumulated damage in the vicinity of the step.

中文翻译：

---

关于表面特征的瞬态塑性-弹性流体动力润滑，适用于剖分式滚子轴承

使用滚子轴承作为曲轴主轴承已显示出降低内燃机燃料消耗的潜力。将滚子轴承安装到曲轴上的一种有效方法是拆分外圈。然而，这可能会导致轴承安装时裂口区域出现严重的不圆度，进一步意味着噪音、振动和接触应力的增加。在这项工作中，开发了一种使用商业有限元软件研究弹弹流体动力学接触的新方法。建模方法基于在空间中移动的接触，允许以直接的方式研究基于润滑剂压力的应力历史。该模型首先用于研究粗糙对润滑条件的影响，表明应力可能会超过材料的屈服强度，这是由于表面特征过度轧制时发生的瞬态效应。此后，该模型用于分析已安装的曲轴滚子轴承中的台阶，目的是指定临界台阶高度，这意味着零塑性，从而降低台阶附近累积损坏的风险。