Finite element analysis on temperature stress in continues welded rail

PAN Wen-bin1， YE Yuan1， HAN Hong-jiang2， YANG Tao1， SONG Jia-wang2
（1. College of Mechanical Engineering， Zhejiang University of Technology， Hangzhou 310000， China；
2. Superplasticity & Plasticity Institute， Jilin University， Changchun 130022， China）

Abstract： Aiming at the problem that the large temperature stress in continues welded rail（CWR） could threaten the track safety appliances， based on the finite element method，considered with the resistances of fasteners and rail bed，the finite element analysis software ABAQUS and 3D modeling software CATIA was applied to simulate the temperature stress in the rail. Using the boundary conditions to control the temperature change of the environment， the distribution of temperature stress field in the rail was obtained. On this basis，the distribution of mises、longitudinal、tangential and vertical stress was analyzed. The research results indicate that，while ambient temperature changes，the rail will produce large temprature stress，the contact surface of the fastener and the rail is the temperature stress concentration，the longitudinal stress is the maximum stress in the temperature stress component of CWR. Compared with the practical data，the longitudinal temperature stress force is less than the rail yield strength. Thus，the CWR temperature stress analysis of finite element software ABAQUS has feasibility，it also lays a good foundation for further study.
Key words： high-speed railway； continues welded rail（CWR）； temperature stress； finite element analysis（FEA）