Effects of dent size on the evolution process of rolling contact fatigue damage on defective rail

Zhang, S.Y.; Zhao, Xiaohu; Ding, Haohao; Spiryagin, Maksym; Guo, Jun; Liu, Q.Y.; Wang, W.J.; Zhou, Zhongrong

doi:10.1016/j.wear.2021.203894

Cited by 18 publications

(1 citation statement)

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“…Under heavy loads, rails develop fatigue microcracks, which propagate to macrocracks [ 2 ]. When fatigue macrocracks propagate to a certain extent, they will eventually lead to sudden rail fractures, casualties, and other catastrophic consequences [ 3 ]. Therefore, the study of rail fatigue crack propagation characteristics is helpful for analyzing the crack failure mechanism to provide a theoretical basis for improving railway transportation safety.…”

Section: Introductionmentioning

confidence: 99%

Influence of Stress Intensity Factor on Rail Fatigue Crack Propagation by Finite Element Method

et al. 2021

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Wheel rail rolling contact fatigue is a very common form of damage, which can lead to uneven rail treads, railhead nuclear damage, etc. Therefore, ANSYS software was used to establish a three-dimensional wheel–rail contact model and analyze the effects of several main characteristics, such as the rail crack length and crack propagation angle, on the fatigue crack intensity factor during crack propagation. The main findings were as follows: (1) With the rail crack length increasing, the position where the crack propagated by mode I moved from the inner edge of the wheel–rail contact spot to the outer edge. When the crack propagated to 0.3–0.5 mm, it propagated to the rail surface, causing the rail material to peel or fall off and other damage. (2) When the crack propagation angle was less than 30°, the cracks were mainly mode II cracks. When the angle was between 30 and 70°, the cracks were mode I–II cracks. When the angle was more than 70°, the cracks were mainly mode I cracks. When the crack propagation angle was 60°, the equivalent stress intensity factor reached the maximum, and the rail cracks propagated the fastest.

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Section: Introductionmentioning

confidence: 99%