基于有限元法的分形粗糙界面滑动状态分析

Sliding State Analysis of Fractal Rough Interface Based on the Finite Element Method.

作者信息

Wu Jianpeng, Wang Liyong, Li Le, Shu Yuechao, Yang Li, Lei Tonghui

机构信息

The Key Laboratory of Modem Measurement and Control Technology in Ministry of Education, Beijing Information Science & Technology University, Beijing 100192, China.

College of Mechanical and Electrical Engineering, Beijing Information Science & Technology University, Beijing 100192, China.

出版信息

Materials (Basel). 2021 Apr 22;14(9):2121. doi: 10.3390/ma14092121.

DOI:10.3390/ma14092121

PMID:33922128

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8122708/

Abstract

Local high temperature, stress concentration, and abnormal friction coefficients will appear at the friction pair in a wet clutch as a result of surface topography real-time changing. In order to improve the reliability of clutch friction components and reduce the failure phenomenon, the three-dimensional fractal surface topography data of the actual rough surface asperities are scanned, extracted, and processed successively, and then the finite element model of the rotary sliding friction pair is established considering the micro surface topography. Based on the finite element model, the variation of surface stress and strain is analyzed, and the friction coefficient measured experimentally is taken as the model input. It is concluded that when the rough surface and smooth surface make contact with each other, the maximum stress and plastic strain appear at the inner radius edge. Therefore, this research has a guiding significance for the structural design and processing technology of the friction components in a vehicle clutch.

摘要

由于表面形貌实时变化，湿式离合器中的摩擦副会出现局部高温、应力集中和异常摩擦系数。为提高离合器摩擦部件的可靠性并减少失效现象，依次对实际粗糙表面微凸体的三维分形表面形貌数据进行扫描、提取和处理，然后考虑微观表面形貌建立旋转滑动摩擦副的有限元模型。基于该有限元模型，分析表面应力和应变的变化，并将实验测量的摩擦系数作为模型输入。结果表明，粗糙表面与光滑表面相互接触时，最大应力和塑性应变出现在内半径边缘。因此，本研究对车辆离合器摩擦部件的结构设计和加工工艺具有指导意义。