On Some Criteria Defining Fretting Wear

IF 0.5 4区 工程技术 Q4 ENGINEERING, MECHANICAL
V. V. Izmailov, M. V. Novoselova
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引用次数: 0

Abstract

Based on the mechanics of discrete contact of rough surfaces of machine parts, quantitative criteria are proposed that determine the boundaries of fretting wear regimes. The physical foundation of these criteria is the ratio of the amplitude of tangential oscillatory displacements of contacting bodies and characteristic linear quantities associated with the dimensions of the real contact areas of the contacting surfaces. It is convenient to characterize fretting wear regimes using maps on which the boundaries of the areas of the corresponding regimes are shown in the coordinates: oscillation amplitude/normal contact load (or nominal contact pressure). The influence of the wear regime on the life of one of the common types of connections subject to fretting wear, namely electrical contacts, has been shown experimentally. Using a map of fretting wear regimes, the influence of the amplitude of tangential oscillations and normal load on the dependence of the contact electrical resistance on the number of oscillation cycles under different regimes was analyzed. The fundamental difference between this dependence in the fretting wear regime and in the normal reciprocating sliding of contacting surfaces is shown. The proposed criteria of fretting wear regimes and their visual representation in the form of wear regime maps allow predicting the wear mechanism of a given contact joint. Understanding the wear mechanism allows for a reasonable choice of materials for contacting parts and contact joint parameters (contact pressure, contact rigidity) to ensure the reliability of friction joints, including electrical contacts, under fretting wear conditions.

Abstract Image

微动磨损的一些定义标准
基于机械零件粗糙表面的离散接触力学,提出了确定微动磨损边界的定量准则。这些准则的物理基础是接触体的切向振荡位移的振幅与与接触面实际接触面积的尺寸相关的特征线性量的比值。使用相应区域的边界在坐标中显示的图来表征微动磨损状态是方便的:振荡幅度/法向接触载荷(或标称接触压力)。磨损状态对受微动磨损的一种常见类型的连接的寿命的影响,即电触点,已经通过实验显示。利用微动磨损状态图,分析了不同状态下切向振荡幅值和法向载荷对接触电阻随振荡周期数变化的影响。这种依赖在微动磨损制度和在正常的接触表面的往复滑动之间的根本区别被显示。提出的微动磨损状态的标准及其以磨损状态图形式的可视化表示允许预测给定接触关节的磨损机制。了解磨损机理可以合理选择接触部件的材料和接触关节参数(接触压力、接触刚度),以确保摩擦关节(包括电触点)在微动磨损条件下的可靠性。
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来源期刊
Journal of Friction and Wear
Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
1.50
自引率
28.60%
发文量
21
审稿时长
6-12 weeks
期刊介绍: Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.
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