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Experimental Investigations on the Effects of Fatigue Crack in Urban Metro Welded Bogie Frame by Wang, Wenjing; Bai, Jinyi; Wu, Shengchuan; Zheng, Jing; Zhou, Pingyu is a Engineering article available to read on EtoBox.

What is Experimental Investigations on the Effects of Fatigue Crack in Urban Metro Welded Bogie Frame about?

The welded bogie frame is the critical safety part of the urban metro vehicle. This paper focuses on finding out the factors inducing the fatigue cracks initiated from the positioning block weld toe of metro bogie frame. Fracture morphology and metallographic analysis were conducted to identify the failure modes, and on-track tests about the dynamic stress at the positioning block weld toe and vibration acceleration were performed. The typical signals of dynamic stress and acceleration were analyzed from time and frequency domain. The relationship between wheel polygon, rail corrugation, running speed and dynamic stress in amplitude and frequency are investigated in details. Research results show that the micro cracks induced by welding at the weld toe of positioning block propagate to the spring sleeve under relatively high alternating dynamic stress, which is strongly influenced by the wheel polygon, rail corrugation and the train running speed.

Who reads Experimental Investigations on the Effects of Fatigue Crack in Urban Metro Welded Bogie Frame?

Author

Wang, Wenjing; Bai, Jinyi; Wu, Shengchuan; Zheng, Jing; Zhou, Pingyu

Publisher

MDPI AG; Multidisciplinary Digital Publishing Institute (MDPI); Basel: MDPI AG, 2011- (ISSN 2076-3417)

Published

2020

Language

EN

Field

Engineering (Physical Sciences)