Two-Dimensional Models of Boundary and Mixed Friction at a Line Contact
Two-Dimensional Models of Boundary and Mixed Friction at a Line Contact
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线接触处的边界和混合摩擦的二维模型
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
A. Soom
中科院分区：
文献类型：
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作者：
A. Polycarpou;A. Soom
建立了边界润滑和混合润滑条件下的二维线接触动态摩擦模型。摩擦系数示出为滑动速度和滑动体的瞬时分离的函数，垂直于滑动方向。该模型是基于恒定的正常负载和随时间变化的滑动速度下进行的非稳态摩擦实验。滑动接触处的正常运动由接触电阻测量间接检测。接触电阻与光滑表面的理论中心膜厚度有关。一个先进的系统识别技术（最小模型误差）的实施，以确定在一些非线性摩擦模型的最重要的条款。两个摩擦模型，然后无量纲化和参数化。然后通过与实验和其他研究人员提出的模型进行比较，验证了模型的有效性和适用范围
Two-dimensional dynamic friction models at a lubricated line contact, operating in boundary and mixed lubrication regimes, are developed. The friction coefficient is shown to be a function of the sliding velocity and the instantaneous separation of the sliding bodies, normal to the sliding direction. The models are based on unsteady friction experiments carried out under constant normal loads and under time-varying sliding velocities. The normal motions at the sliding contact were detected indirectly by contact resistance measurements. The contact resistance is related to the theoretical central film thickness for smooth surfaces. An advanced system identification technique (Minimum Model Error) is implemented to identify the most important terms in a number of nonlinear friction models. Two friction models are then nondimensionalized and parameterized. The validity and range of application of the models are then tested, by comparing them with experiments and with selected models proposed by other researchers