Remodeling of Elastohydrodynamic Lubrication Rheology on the Basis of High Accuracy Temperature Measurements of Oil Film

本课题的研究目的是为了更好地了解在高压、高剪切速率导致膜形态异常的弹流动力条件下，膜的流变特性。利用红外显微镜高精度地测量了油膜和表面的温度分布。采用白光光学干涉法测量薄膜厚度。此外，还利用金刚石砧槽制作了静态条件下润滑油的相图。结果表明，即使在高滑动条件下，异常薄膜形状的温升也很小。由于高压的作用，薄膜的厚度分布发生了形状的改变。

The purpose of this research project is to obtain better understanding of rheological characteristics of films driven in elastohydrodynamic conditions, in which high pressure high shear rate are applied to cause abnormal film shape. The temperature distributions of oil film and surfaces were measured by an infrared microscope with a high accuracy. The film thickness was measured by white light optical interferometry. In addition, a diamond anvil cell was used to make the phase diagram of lubricant under static conditions. It was found that the temperature rise was quite small in abnormal film shape even in high sliding conditions. The film thickness distribution appeared to change the shape because of solidification as a consequence of high pressure.