块环结构聚合物-金属接触的有限元分析与实验验证

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Friction Pub Date : 2023-12-04 DOI:10.1007/s40544-023-0795-x
K. Y. Eayal Awwad, Khosro Fallahnezhad, B. F. Yousif, Ahmad Mostafa, Omar Alajarmeh, A. Shalwan, Xuesen Zeng
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引用次数: 0

摘要

由不同的摩擦计获得的磨损轮廓分析对于表征磨损机制至关重要。然而,现有的方法大多没有考虑磨损剖面上的应力分布,导致分析不准确。在本研究中,采用有限元模型(FEM)和实验研究相结合的方法,分析了干滑动条件下由块环结构获得的聚合物-金属接触磨损轮廓。Archard的磨损方程被集成到与Abaqus软件链接的开发FORTRAN-UMESHMOTION代码中。在FEM中测量和实现了涵盖磨合和稳态区域的不同磨损系数(k)值,以及涉及轻度和重度磨损区域的一系列施加载荷。有限元计算结果与实验结果吻合较好。该模型再现了不同试验条件下的应力分布曲线,其数值受滑动方向和最大磨损深度(hmax)的影响。暴露在平均接触应力下的磨损轮廓的最大区域被定义为正常区域。而临界带的特点是应力浓度高,达到正常带的10倍。通过绘制磨损轮廓来确定应力集中的关键区域,这是该定义的关键点。利用扫描电子显微镜(SEM)观察了不同区域的表面特征。SEM分析结果表明,临界区损伤特征比正常区损伤特征更为严重。然而,文献数据提出并认为磨损特征在磨损曲线的任何一点都是相同的。本研究在0.5 MPa左右的应力值下确定了正常区,在5.5 MPa左右的应力值下确定了临界区。这两个区域的磨损行为表现出完全不同的特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Finite element analysis and experimental validation of polymer–metal contacts in block-on-ring configuration

Finite element analysis and experimental validation of polymer–metal contacts in block-on-ring configuration

The wear profile analysis, obtained by different tribometers, is essential to characterise the wear mechanisms. However, most of the available methods did not take the stress distribution over the wear profile in consideration, which causes inaccurate analysis. In this study, the wear profile of polymer–metal contact, obtained by block-on-ring configuration under dry sliding conditions, was analysed using finite element modelling (FEM) and experimental investigation. Archard’s wear equation was integrated into a developed FORTRAN–UMESHMOTION code linked with Abaqus software. A varying wear coefficient (k) values covering both running-in and steady state regions, and a range of applied loads involving both mild and severe wear regions were measured and implemented in the FEM. The FEM was in good agreement with the experiments. The model reproduced the stress distribution profiles under variable testing conditions, while their values were affected by the sliding direction and maximum wear depth (hmax). The largest area of the wear profile, exposed to the average contact stresses, is defined as the normal zone. Whereas the critical zones were characterized by high stress concentrations reaching up to 10 times of that at the normal zone. The wear profile was mapped to identify the critical zone where the stress concentration is the key point in this definition. The surface features were examined in different regions using scanning electron microscope (SEM). Ultimately, SEM analysis showed severer damage features in the critical zone than that in the normal zone as proven by FEM. However, the literature data presented and considered the wear features the same at any point of the wear profile. In this study, the normal zone was determined at a stress value of about 0.5 MPa, whereas the critical zone was at about 5.5 MPa. The wear behaviour of these two zones showed totally different features from one another.

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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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