Development of High-Speed Infrared Thermographic Microscope for Dynamic Visualization of Tribological Phenomena

开发用于摩擦学现象动态可视化的高速红外热成像显微镜

基本信息

批准号：
09555031
负责人：
SAKAGAMI Takahide
金额：
$ 5.63万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

The present project developed a high-speed infrared thermographic microscope for dynamic visualization of the tribological phenomena. Several experimental investigations of contact problems were carried out through the use of the developed high-speed infrared thermographic microscope. The results obtained are summarized as follows.1. An infrared thermographic microscope system was developed based on the high-speed infrared camera for evaluating temperature and stress distribution of the contact surface and its surrounding area2. A new technique using infrared thermographic microscope combined with infrared-transmitting materials was proposed for the direct measurement of the surface temperature of two contacting solids. This technique was applied to contact stress measurement, through the accurate detection of small cyclic temperature fields induced by the coupled-thermoelastic effect. Contact stress measurements were made for both flat-on-flat and the Hertzian contact. Excellent images of the contact stress distribution were obtained by the infrared thermography based stress analyzing system, indicating that the present technique was applicable to the visualization and quantitative analysis of the contact stresses.3. The high-speed infrared thermographic microscope was employed to characterize the near-surface conditions associated with fretting contact. Both frictional temperature rise due to interfacial slip and the temperature fluctuation due to thermoelasticity can be measured by this system. The experimental results provide insight into not only the magnitude and distribution of near-surface temperatures, but also the nature of the contact stress field and the mechanics of partial slip fretting contacts.

本项目开发了一种高速红外热力学显微镜，用于摩擦学现象的动态可视化。通过使用开发的高速红外热力学显微镜进行了几项有关接触问题的实验研究。获得的结果总结如下1。基于高速红外摄像头开发了红外热力学显微镜系统，用于评估接触表面及其周围区域的温度和应力分布2。提出了一种使用红外热力学显微镜与红外传输材料结合的新技术，用于直接测量两种接触固体的表面温度。通过准确检测由耦合的热弹性效应诱导的小环形温度场，将此技术应用于接触应力测量。对平板板和赫兹的接触进行了接触应力测量。接触应力分布的出色图像是通过基于红外热仪的应力分析系统获得的，表明本技术适用于接触应力的可视化和定量分析3。使用高速红外的热力学显微镜来表征与拧紧接触相关的近表面条件。界面滑动引起的摩擦温度升高和由于热弹性的温度波动均可通过该系统测量。实验结果不仅提供了近表面温度的幅度和分布的见解，还提供了接触应力场的性质和部分滑动螺丝接触的机制。