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

本研究的目的是为了更好地了解在弹流条件下驱动的薄膜的流变特性，在这种情况下，高压高剪切率会导致薄膜形状异常。用红外显微镜高精度测量了油膜和表面的温度分布。用白光干涉法测量了薄膜的厚度。此外，在静态条件下，用金刚石顶压室绘制了润滑剂的相图。研究发现，即使在高滑动条件下，异形油膜的温升也很小。由于高压的作用，薄膜的厚度分布发生了改变，形成了薄膜的形状。

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.