Influence of Contact Pressure on Central and Minimum Film Thickness Within Ultrathin Film Lubricated Contacts
Influence of Contact Pressure on Central and Minimum Film Thickness Within Ultrathin Film Lubricated Contacts
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DOI：
10.1115/1.2032991
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发表时间：
2005-10
影响因子：
2.5
通讯作者：
I. Křupka;M. Hartl;M. Liska
中科院分区：
文献类型：
--
作者：
I. Křupka;M. Hartl;M. Liska
最近的数值结果表明，油膜厚度与速度之间的关系并不总是遵循简单的幂定律，特别是在恶劣的条件下。本文旨在获得在高接触应力和低速下的实验结果，以研究薄膜的行为。利用光学试验台在最大赫兹压力为0.52、1.01和1.54 GPa时观察到超薄的润滑膜。用薄膜比色干涉法从彩色干涉图中获得中心膜厚和最小膜厚值。随着轧制速度的提高，中心膜厚和最小膜厚在对数-对数坐标系下均表现出非线性行为，从而减小了膜厚。接触压力越高，这种趋势越明显。
Recent numerical results have indicated that the relationship between the film thickness and the speed may not always follow the simple power law, especially under severe conditions. This paper is aimed at obtaining experimental results at high contact stresses and low speeds to study the thin film behavior. Ultrathin lubricant films were observed at maximum Hertz pressures of 0.52, 1.01, and 1.54 GPa by using an optical test rig. Central and minimum film thickness values were obtained with thin film colorimetric interferometry from chromatic interferograms. The nonlinear behavior of both central and minimum film thicknesses in log-log coordinates was observed as rolling speed and thereby film thickness decreased. This tendency became more obvious at higher contact pressures.