Simulation of wear in a rolling-sliding contact by a semi-Winkler model and the Archard's wear law
Simulation of wear in a rolling-sliding contact by a semi-Winkler model and the Archard's wear law
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DOI：
10.1016/s0043-1648(03)00524-6
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发表时间：
2004-04-01
期刊：
影响因子：
5
通讯作者：
Telliskivi, T
中科院分区：
文献类型：
--
作者：
Telliskivi, T
这项工作的目的是开发一种控制滚动-滑动接触中影响接触副的摩擦磨损的方法。研究的范围是小范围的摩擦学，通过这种摩擦学，磨损机制将直接由阿查德定律阐明。在模拟中使用Archard磨损定律的前提是在子结构水平上对接触进行适当的分段线性建模，包括对接触的每个部分的变形和相对运动的预测。实际接触处的变形程度取决于法向力等参数。相对运动、几何形状、表面牵引力等。需要一种模拟工具来解释这些参数的作用。本工作模拟众所周知的盘片干磨损试验。法向荷载作用下的变形场用Winkler床层法求解。在已知每个分区的法向压力场、侵彻和刚体一般运动的情况下，计算切向应力场。采用位势理论中的影响函数来模拟接触面的切向牵引力和位移场。这种特殊的计算不需要依赖于泊松比的蠕变常数，并且结果不依赖于接触区的形状。每个矩形单元格都要测试它是否会滑动。滑动距离的计算方法是从刚体的相对运动中减去弹性位移。弹性变形是可逆的，在接触粘附区和滑移区都存在，并将模拟结果与圆盘试验结果进行了比较。在不同的载荷和蠕变水平下，磨损和滚动摩擦具有很好的一致性。(C)2003爱思唯尔B.V.保留所有权利。
The purpose of this work is to develop a method of controlling the friction and wear affecting the contact pair in rolling-sliding contact. The scope is in small-scale tribology by which mechanism of wear would be clarified on first hand by Archard's law. The prerequisite for using Archard's wear law in a simulation is proper piecewise linear modelling of contact at the substructural level, including prediction of deformations and relative motions for every part of the contact. The deformation level at the real contact depends on such parameters as normal forces. relative motions, geometry, surface tractions, etc. There is a need for a simulation tool that explains the role of these parameters.The present work simulates the well-known disc-on-disc test for dry wear. The deformation field due to normal load is solved by the Winkler mattress method. The tangential stress field is subsequently calculated knowing the normal pressure field, the penetration and the general rigid body movement for every subregion. The influence functions from potential theory are used to model the tangential traction and displacement field in the contact. The special computing excludes the need for the creep constants that depend on the Poisson's ratio and the result is not dependent on the shape of the contact area. Every rectangular cell is tested whether it is subject to sliding. The sliding distance is calculated by subtracting elastic displacements from the relative motion of the rigid body. The elastic deflections are reversible and exist both under the sticking region in contact and also in the sliding region.A comparison of the results of a simulation and a disc-on-disc test is presented. Good agreement was found for both wear and rolling friction at different load and creep levels. (C) 2003 Elsevier B.V. All rights reserved.