Equivalent Fatigue Stress Analysis of the Key Parts of Railway RD₂ Axle

Abstract:

Nonlinear dynamics model of the C₆₂ freight car was established firstly and the random load spectrum acted on the wheelset was obtained by the simulation of the freight car running on a typical line. Taking the cyclic constructive relation of LZ50 axle steel into account in the finite element analysis of the wheelset, the stress time histories of the key parts of the axle in some typical conditions were got. Furthermore, based on the stress spectrum analysis of the hazard sections of the axle, the probabilistic fatigue stress spectrums with given probability and confidence were obtained. Finally, combining with the linear cumulative damage rules, the stress distribution of RD₂ axle was investigated, which is fundamental for the further prediction of the fatigue life of axle.

• Periodical: Advanced Materials Research (Volumes 466-467)
• Pages: 666-671
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.466-467.666
• Online since: February 2012
• Authors: Hong Qin Liang, Yong Xiang Zhao, Ping Bo Wu
• Keywords: Axle, Fatigue Reliability, Finite Element Method (FEM), Random Load

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