Study on the Steel Rail Rolling Contact Stress with Consideration of Initial Residual Stress
1 College of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Liaoning, Shandong, China
2 Shangdong Kerui Petroleum Equipment Co, .Ltd, Dongying, Shandong, China
3 China Academy of Railway Sciences, Beijing, China
* Corresponding author: email@example.com
Based on ANSYS/LS-DYNA explicit analysis software, this paper established the three-dimensional finite element model of wheel/rail rolling contact in curve negotiation with consideration of the residual stress impact after rail straightening process. It used the dynain file method to apply the initial residual stress to the rails, and conducted numerical simulation to the process of dynamic wheel/rail rolling contact under the operation condition which is corresponding to the setting of taking velocity and axle load as the variables. The simulation results can show that with the increase of velocity, the equivalent stress on the outer rail railhead and at the rail web will increase accordingly; the equivalent stress on the inner rail railhead and at the rail web will decrease accordingly; and the equivalent stress on the rail flange will be basically the same. With the increase of axle load, all the equivalent stress on the railheads and rail web of the inner rail and the outer rail will increase accordingly while the equivalent stress on the rail flange will be basically the same.
Key words: wheel/rail rolling contact / residual stress / curve negotiation / numerical simulation
© Owned by the authors, published by EDP Sciences, 2015
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