Friction coefficient and error test via micro-rotation mechanics model  

作　　者：Zhitong Chen Guang Li Yuan Xia 

机构地区：[1]Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [2]Graduate University,Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Theoretical & Applied Mechanics Letters》2012年第2期33-36,共4页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (10832011)

摘　　要：An air pressure-loading mode incorporated into the friction apparatus is firstly applied to coatings tribology involving large load, automation, stepless and continuous loading processes. A novel measurement principle is proposed and a micro-rotation mechanics model was developed for high precision measurement of friction coefficient. By properly designing and locating two sensors real-time monitoring the normal and friction forces, the troublesome influences in friction measurement is considerably relieved which come from surface characteristics of coatings of the samples in traditional friction test processes. By calculation and analysis, the max rotation angle 0max = 0.0018°is gained, which indicates that the measurement error of the apparatus is greatly reduced. The whole system error is about 1.15% given by finite element method and indication error of the least square fitting of measurements.An air pressure-loading mode incorporated into the friction apparatus is firstly applied to coatings tribology involving large load, automation, stepless and continuous loading processes. A novel measurement principle is proposed and a micro-rotation mechanics model was developed for high precision measurement of friction coefficient. By properly designing and locating two sensors real-time monitoring the normal and friction forces, the troublesome influences in friction measurement is considerably relieved which come from surface characteristics of coatings of the samples in traditional friction test processes. By calculation and analysis, the max rotation angle 0max = 0.0018°is gained, which indicates that the measurement error of the apparatus is greatly reduced. The whole system error is about 1.15% given by finite element method and indication error of the least square fitting of measurements.

关 键 词：air pressure-loading measurement principle micro-rotation FRICTION error analysis 

分 类 号：TU352.1[建筑科学—结构工程] TP391.41[自动化与计算机技术—计算机应用技术]