摘要
本文对产生接触热阻的机理进行了深入的讨论,对影响接触热阻的滞后效应和接触面上切应力等因素进行了实验研究和理论探讨。本文给出了滞后效应的合理定义,根据该定义,产生滞后效应的主要原因不是接触面的塑性变形,而是材料的弹性蠕变。通过实验发现:接触热阻的滞后量很小,所以工程中可忽略滞后效应的影响;接触面上切应力如果不使两表面发生打滑,则切应力对接触热阻没有影响;如果两表面发生了滑动,则接触热阻要减小。
The mechanism of thermal contact resistance is discussed in detail, and influences of hysteresis and tangential stress on this resistance are studied experimentally and theoretically. A reasonable definition of the hysteresis effect is given, according to which, the reason of the hystereesis effect is not the plastic deformation of the interfaces, but is the elastic creep of materials. Through experment the following is discovered: 1) the amount of the hysteresis is very small, so that the hysteresis effect can be neglected in engineering design; 2) if the sliding between two surfaces do not take place, the thermal contact resistance will be not changed by the tangential stress on the interface, and if this sliding occurs, the thermal contact resistance will decrease.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
1993年第2期119-125,共7页
Journal of Northwest University（Natural Science Edition）
关键词
接触热阻
滞后效应
切应力
thermal contact resistance hysteresis tangential stress
