Modeling Sliding Contact of Rough Surfaces with Molecularly Thin Lubricants

被引:0
作者
Antonis I. Vakis
Andreas A. Polycarpou
机构
[1] University of Illinois at Urbana-Champaign,Department of Mechanical Science and Engineering
来源
Tribology Letters | 2012年 / 45卷
关键词
Nanotribology; Magnetic data storage; Sub-boundary lubrication; Rough surfaces; Adhesion; Friction;
D O I
暂无
中图分类号
学科分类号
摘要
The sliding contact between two rough surfaces in the presence of a molecularly thin lubricant layer is investigated. Under very high shear rates, the lubricant is treated as a semi-solid layer with normal and lateral shear-dependent stiffness components obtained from experimental data. The adhesive force in the presence of lubricant is also adapted from the Sub-boundary lubrication model and improved to account for variation in surface energy with penetration into the lubricant layer. A model is then proposed, based on the Improved sub-boundary lubrication model, which accounts for lubricant contact and adhesion and its validity is discussed. The model is in good agreement with published experimental measurements of friction in the presence of molecularly thin lubricant layers and suggests that a molecularly thin lubricant bearing could be successfully used to reduce solid substrate damage at the interface.
引用
收藏
页码:37 / 48
页数:11
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