铁道科学与工程学报2016，Vol.13Issue(3)：441-446,6.
钢轨裂纹疲劳与磨损耦合关系的研究
Research of the coupling relationship between rail crack fatigue and wear
摘要
Abstract
Fatigue and wear coupling model based on the finite element method software ANSYS was used to ana-lyze the competition mechanism between fatigue and wear.The equivalent stress intensity factor Keff of the crack tip was obtained for the initial crack with 100μm and 30°under the pure rolling state and ten tons axle load,and then the equivalent stress intensity factor Keff of different length crack was obtained.The results show that,the major damage of rail is wheel /rail contact fatigue.The stress intensity factor KI increases firstly,and then de-creases with the increase of crack length.In the initial extension stage of crack,the extending direction of crack is the same of the driving direction.When the crack length is more than 600 microns,the extending direction transforms into the opposite of driving direction,and forming the crack which looks like a fishhook.关键词
ANSYS/疲劳/磨损/耦合/裂纹扩展方向Key words
ANSYS/fatigue/wear/couple/crack growth direction分类
交通工程引用本文复制引用
李孝滔,良华,李煦,曹世豪,江晓禹..钢轨裂纹疲劳与磨损耦合关系的研究[J].铁道科学与工程学报,2016,13(3):441-446,6.基金项目
国家自然科学基金重点资助项目 （）
