The Fatigue Life Prediction of Train Wheel Rims Containing Spherical Inclusions

[摘要] It is a common phenomenon that fatigue crack initiation occurs frequently in the inclusions of wheel rims. Research on the fatigue life of wheel rims with spherical inclusions is of great significance on the reliability of wheels. To find the danger point and working condition of a wheel, the stress state of the wheel rim with spherical inclusions was analyzed using the finite element method. Results revealed that curve conditions are dangerous. The critical plane method, based on the cumulative fatigue damage theory, was used to predict the fatigue life of the wheel rim and whether it contained spherical inclusions or not under curve conditions. It was found that the fatigue life of the wheel rim is significantly shorter when the wheel rim contains spherical inclusions. Analysis of the results can provide a theoretical basis and technical support for train operations and maintenance.

[发布机构] Zhejiang Province's Key Laboratory of Reliability Technology for Mechanical and Electrical Product, China^1;Zhejiang Sci-Tech University, Hangzhou; 310018, China^2

[效力级别] 无线电电子学

[关键词] Critical plane method;Cumulative fatigue damage theory;Fatigue crack initiation;Fatigue life prediction;Spherical inclusion;Stress state;Technical support;Train operations