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RESEARCH PAPERS

Elastic-Plastic Finite Element Analysis of Nonsteady State Partial Slip Wheel-Rail Rolling Contact

[+] Author and Article Information
Zefeng Wen

State Key Laboratory of Traction Power,  Southwest Jiaotong University, Chengdu 610031, China

Xuesong Jin1

State Key Laboratory of Traction Power,  Southwest Jiaotong University, Chengdu 610031, Chinaxsjin@home.swjtu.edu.cn

Yanyao Jiang

Department of Mechanical Engineering (312),  University of Nevada, Reno, NV 89557

1

To whom correspondence should be addressed.

J. Tribol 127(4), 713-721 (Jun 21, 2005) (9 pages) doi:10.1115/1.2033898 History: Received March 11, 2005; Revised June 21, 2005

A finite element analysis with the implementation of an advanced cyclic plasticity theory was conducted to study the elastic-plastic deformation under the nonsteady state rolling contact between a wheel and a rail. The consideration of nonsteady state rolling contact was restricted to a harmonic variation of the wheel-rail normal contact force. The normal contact pressure was idealized as the Hertzian distribution, and the tangential force presented by Carter was used. Detailed rolling contact stresses and strains were obtained for repeated rolling contact. The harmonic variation of the normal (vertical) contact force results in a wavy rolling contact surface profile. The results can help understand the influence of plastic deformation on the rail corrugation initiation and growth. The creepage or stick-slip condition greatly influences the residual stresses and strains. While the residual strains and surface displacements increased at a reduced rate with increasing rolling passes, the residual stresses stabilize after a limited number of rolling passes. The residual stresses and strains near the wave trough of the residual wavy deformation are higher than those near the wave crest.

Copyright © 2005 by American Society of Mechanical Engineers
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References

Figures

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Figure 14

Variation of the surface depth with rolling passes

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Figure 16

Development of surface profile for ξ=0.003

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Figure 1

Line rolling contact with nonsteady normal pressure variation: (a) notation and sign convention for nonsteady line rolling contact; (b) schematic illustration of a moving contact pressure

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Figure 2

Tangential force distribution for line rolling contact

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Figure 3

Relationship between tangential force and creepage obtained following Carter

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Figure 4

Finite element mesh model for nonsteady state rolling contact analysis

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Figure 5

Residual shear strain contours after 10 rolling passes (ξ=0.001). Displacements are magnified 50× and 90× in horizontal and vertical direction, respectively.

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Figure 6

Shear stress-strain response (ξ=0.001,z∕a0=0.311, under trough)

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Figure 7

Development of residual stresses below the wave trough for ξ=0.001: (a) x direction; (b) y direction

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Figure 8

Development of residual shear strains below the trough for ξ=0.001

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Figure 9

Influence of creepage on the residual stresses after 10 rolling passes: (a) x direction; (b) y direction

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Figure 10

Influence of creepage on the residual shear strain after 10 rolling passes

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Figure 11

Variation of the residual shear strain on the contact surface with rolling passes

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Figure 12

Variation of surface displacement in the x direction with rolling passes

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Figure 13

Variation of surface displacement in the z direction with rolling passes

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Figure 15

Variation of the rate of the surface depth with rolling passes

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