In situ pressure measurements in dimpled elastohydrodynamic sliding contacts by Raman microspectroscopy
In situ pressure measurements in dimpled elastohydrodynamic sliding contacts by Raman microspectroscopy
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DOI：
10.1016/j.triboint.2008.10.005
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发表时间：
2009-05
影响因子：
6.2
通讯作者：
K. Yagi;P. Vergne;T. Nakahara
中科院分区：
文献类型：
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作者：
K. Yagi;P. Vergne;T. Nakahara
利用拉曼光谱对不同滑动条件下玻璃-钢点接触形成的韧窝内的压力进行了原位测量。实验采用球盘式装置，其中旋转的玻璃盘和旋转的钢球之间形成圆形接触。用双色光学干涉法测量了薄膜的厚度分布。用具有较高压粘系数的聚苯醚油(5P4E)在接触区产生凹陷。实验结果表明，凹坑区域的压力局部增大，压力分布随滑滚比的变化而变化。最大压力位于酒窝最大高度的下游。讨论了在出现韧窝的情况下，油膜的流变响应。
In situ pressure measurements within dimples formed in glass–steel point contacts under various sliding conditions were performed using Raman microspectroscopy. Experiments were conducted using a ball-on-disc type apparatus in which a circular contact is formed between a rotating glass disc and a rotating steel ball. Film thickness distributions were measured by duochromatic optical interferometry. Polyphenyl ether oil (5P4E) which has a high pressure–viscosity coefficient was used to produce a dimple in the contact area. Experimental results show that the pressure increases locally in the dimple zone and the pressure profile changes, accompanying the changes of the dimple location as a function of the slide-to-roll ratio. The maximum pressure is located downstream the maximum height of the dimple. The rheological response of the oil film under dimple occurrence conditions is discussed.