Failure simulation, test and optimization of slide plate at metro turnouts

Wang, Pengsong; Xin, Tao; Ding, Yu Qi; Wang, Sen; Huo, Hailong; Chen, Peng; Nadakatti, Mahantesh M.

doi:10.1016/j.engfailanal.2021.105710

Cited by 3 publications

(1 citation statement)

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“…Most scholars believe that the fatigue effect and the influence of the material of the slide plate are the reasons for the damage to the slide plate. Pengsong Wang et al [2] simulated the failure mode of the metro turnout slide plate, and the results showed that the reason for weld seam separation was that the peak stress of the slide plate was located at the root of the weld seam, and the fatigue life was the lowest. Li et al [3] made on-site tests and theoretical analysis of the slide plate of point rail, and believed that high train speed would produce step phenomenon, which would make the slide plate bear excessive impact force; Jianyue Zhu et al [4] believe that the vertical interaction between the wheel and the rail in the transition section from the base rail to the switch rail can be greatly reduced after the elastic slide plate is used under the switch rail of the speed-up turnout.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Action Mechanism and Crack Response Analysis of Slide Plate of No.12 Turnout

Chen

Han

2022

J. Phys.: Conf. Ser.

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In the course of maintenance and repair, the railway workshops of the Lan-Qing railway found that the slide plate was prone to injury and damage. In order to study the actual stress state of the slide plate during the running of the train, a finite element model of the slide plate and related components was established based on ANSYS, Hypermesh was used for meshing and mesh quality control, and the Mooney-Rivlin constitutive intrinsic model was selected to simulate the rubber plate. The stress state of the slide plate when passing through the turnout in the straight and lateral directions is analyzed respectively. The results show that there is stress concentration at the root of the tongue depressor of the slide plate, and large deformation exists in the middle of the base plate, the front end of the platform plate and the position of the guide iron when passing through the turnout directly and laterally. The stress state of the slide plate is simulated when the rail brace fails, and the maximum stress is found to be 279.24 MPa, which exceeds the material yield limit. Therefore, we should pay attention to the inspection of the condition of the rail brace during the maintenance and repair. Presenting cracks at the weld seam location, it is found that the crack has a significant effect on the dewelding of the slide plate, and the heel position is the weakness of the slide plate. When the crack length reaches 1.2 mm, there is a tendency to crack at the weld seam position of the slide plate, and when the crack length continues to increase, the crack will further expand and jeopardizing structural safety. The research results can provide a theoretical basis for the improvement, disease prevention and maintenance of the slide plate.

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Section: Introductionmentioning

confidence: 99%