Finite Element Analysis of Thermo-mechanical Contact Fatigue Crack in Rail

被引：0

作者：

Li, Wei ^{[1
]}

Wen, Zefeng ^{[1
]}

Wu, Lei ^{[1
]}

Du, Xing ^{[1
]}

Jin, Xuesong ^{[1
]}

机构：

[1] SW Jiaotong Univ, State Key Lab Tract Power, Chengdu 610031, Peoples R China

来源：

PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING AND MECHANICS, VOLS 1 AND 2 | 2009年

关键词：

Wheel-rail friction; Surface crack; Stress intensity factor; Thermo-mechanical coupling; Finite element method; ROLLING-CONTACT; PROPAGATION; GROWTH;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

An oblique surface crack in rail under wheel-rail full slip contact loading and frictional heating is analyzed by finite element simulations. In the present thermo-mechanical coupling finite element model, the heat-convection between the rail and ambient, heat transfer between the crack surfaces, and temperature-dependent material properties are taken into consideration. The effects of the frictional coefficients of wheel-rail contact and crack surfaces and the crack orientation on the stress intensity factors are investigated. The results reveal that the values of stress intensity factors K-1 and K-2 obtained by the thermo-mechanical coupling simulation are lower than those by the only mechanical simulation. But the value of the stress intensity factor range Delta K-2 for the former is higher. Reducing the wheel-rail contact surface frictional coefficient, increasing the crack-face frictional coefficient and avoiding the small angle of crack can restrict the rail surface crack growth.

引用

页码：268 / 273

页数：6

共 20 条

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