滚动接触疲劳作用下的铁轨裂纹萌生与扩展机理  

Mechanism on crack initiation and propagation of rail under rolling contact fatigue

作　　者：郑惠强[1] 刘园[1] 

机构地区：[1]同济大学机械工程学院,上海200092

出　　处：《上海海事大学学报》2009年第2期52-59,共8页Journal of Shanghai Maritime University

基　　金：上海市重点学科资助项目(T0601)

摘　　要：为研究高速铁路由于滚动接触而导致铁轨表面产生裂纹的安全问题,以欧洲地区的研究为主,综述滚动接触疲劳作用下铁轨裂纹萌生与扩展机理及预测裂纹萌生与扩展机理的模型与方法,总结在该领域的研究方向与热点.In order to study the high-speed railroad＇ the rolling contact, the development of mechanism on s safety problems about the rail＇s cracks caused by crack initiation and propagation of rail under rolling contact fatigue （ RCF）, the models and methods of forecasting the development of mechanism on crack initiation and propagation are summarized according to the researches primarily in European area. The research trends and hot spots in this domain are put forward.

关 键 词：滚动接触疲劳 铁轨裂纹 塑性棘轮效应 砖块模型 断裂力学 应力强度因子 

分 类 号：U211.5[交通运输工程—道路与铁道工程] O343.3[理学—固体力学]