国外文献 > 1.轴承 > 4. 设计与分析 > 数值方法
关键词搜索：
| 标 题： |
A Coupled Euler-Lagrange Model for More Realistic Simulation of Debris Denting in Rolling Element Bearings
用于更真实模拟滚动元件轴承碎片压痕的耦合欧拉-拉格朗日模型 |
| 作 者： |
Alexis Bonetto
Daniel Nélias
Thibaut Chaise
Laurent Zamponi |
| 关键词： |
Indentation [压痕]
contamination [ 污染]
rolling element bearings [ 滚动轴承]
FEM [ 女性]
coupled Euler-Lagrange [ 耦合欧拉-拉格朗日方程] |
| 出版年： |
2019 |
| 期刊名： |
Tribology Transactions
摩擦学 Transactions |
| 年卷期： |
2019, vol.62, no.5 |
| 摘 要： |
The objective of this study is to investigate the effects of the contamination of lubricants on denting in rolling element bearings. A dynamic, explicit finite element model (FEM) is developed to reproduce and analyse the elastic–plastic response of the surfaces when a spherical particle passes through a heavily loaded contact area. To cope with mesh distortion issues due to the high deformation of the debris along the process, a novel Eulerian approach is used to model the particle. A parametric study is conducted with the coupled Euler-Lagrange (CEL) model to determine the influence of the debris size, bearing loading, friction coefficient, material properties, and relative sliding between the surfaces on the indentation features. The FEM results emphasize the major role of the material properties of the three bodies on the dent geometry, pointing out that the softer surface undergoes more severe damage. In the same way, the protection of one of the surfaces by a specific heat treatment such as nitriding leads to more severe damage on the other one. The results exhibit a direct link between the particle and dent sizes. For large particles, a change in the dent geometry is observed when the deformed particle size overcomes the contact width because the particle is no longer enclosed in the contact and is therefore spread more easily. The model reproduces two important aspects of the indentation in rolling element bearings, which are the asymmetry of the dent and the residual stresses distribution, providing interesting prospects for future work on the fatigue failure caused by these defects.
本研究旨在探讨润滑剂污染对滚动轴承压痕的影响。开发了一种动态的显式有限元模型（FEM），用于模拟和分析当球状颗粒穿过高载荷接触区域时，表面的弹塑性响应。为应对工艺过程中碎屑高度变形导致的网格畸变问题，采用了一种新的欧拉方法来建模颗粒。通过耦合欧拉-拉格朗日（CEL）模型开展参数化研究，以确定碎屑尺寸、轴承载荷、摩擦系数、材料性能以及表面间相对滑动对压痕特征的影响。有限元模型结果表明，三个物体的材料特性在压痕几何形状中起着关键作用，指出较软的表面受到更严重的损伤。同样地，通过特定热处理（如氮化处理）保护其中一个表面，会导致另一个表面出现更严重的损伤。研究结果表明，颗粒与压痕尺寸之间存在直接关联。对于大颗粒，当变形后的颗粒尺寸超过接触宽度时，会观察到凹陷几何形状的变化，因为颗粒不再被接触区域所包围，因而更容易分散。该模型再现了滚动轴承压入过程中两个重要的方面：凹陷的不对称性以及残余应力分布，为今后研究由这些缺陷引起的疲劳失效提供了有趣的方向。 |
| 中文内容为网络AI翻译，专业术语未必准确，仅供参考。 |
京公网安备 11010202009788