二阶流体纳米级薄膜润滑特性和机理的研究

In the present project, influence of the second-ordered fluid constitutive, the electro-chemical effect of surfaces, and the size of lubricant on the performances of the thin film lubrication are considered. The study on the properties and mechanism of the thin film lubrication is carried out. The governing equations on lubrication are deduced and solved. After the numerical and experimental results are compared, the thin film lubrication model is set up. Furthermore, the measuring mechanism of micro frictional force is developed to carry out the work of experimental analysis and division of lubrication statuses.

二阶流体模型有明确的物理意义，具有时变性和非牛顿特性，因此较适合纳米级润滑薄膜的实际。利用纳米膜厚测量仪等设备，通过实验确定薄膜润滑过程中微观结构与宏观特性之间的联系。经分析归纳确定应力——应变率张量中的关系参数，建立二阶流体薄膜润滑模型。通过控制条件进行实验验证。并对其特性和机理进行数值分析，为薄膜润滑设计提供依据。