Commenced in January 2007
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Paper Count: 30309
Analysis of Rail Ends under Wheel Contact Loading

Authors: Manicka Dhanasekar, Nannan Zong

Abstract:

The effect of the discontinuity of the rail ends and the presence of lower modulus insulation material at the gap to the variations of stresses in the insulated rail joint (IRJ) is presented. A three-dimensional wheel – rail contact model in the finite element framework is used for the analysis. It is shown that the maximum stress occurs in the subsurface of the railhead when the wheel contact occurs far away from the rail end and migrates to the railhead surface as the wheel approaches the rail end; under this condition, the interface between the rail ends and the insulation material has suffered significantly increased levels of stress concentration. The ratio of the elastic modulus of the railhead and insulation material is found to alter the levels of stress concentration. Numerical result indicates that a higher elastic modulus insulating material can reduce the stress concentration in the railhead but will generate higher stresses in the insulation material, leading to earlier failure of the insulation material

Keywords: stress, Finite Element Method, Rail end, material interface, wheel-rail contact

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1071642

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References:


[1] Tan, X., and Bushan, B.: A numerical three-dimensional model for the contact of rough surfaces by variational principle. Journal of Tribology. 118: 33-42, 1996.
[2] Li, J., and Berger, E. J.: A Boussinesq-Cerruti solution set for constant and linear distribution of normal and tangential load over a triangular area. Journal of Elasticity. 63: 137-151, 2001.
[3] Wilner, K.: Fully coupled frictional contact using elastic halfspace theory. Journal of Tribology. 130: 031405, 2008.
[4] Chen, W. W., and Wang, Q. J.: A numerical static friction model for spherical contacts of rough surfaces, influence of load, material and roughness. Journal of Tribology. 131: 031405, 2009.
[5] Liu, S., and Hua, D. Y.: Three-dimensional semiperiodic line contact-periodic in contact length direction. Journal of Tribology. 131: 021408, 2009.
[6] Hetenyi, M.: A general solution for the elastic quarter space. Journal of Applied Mechanics, Transactions of the ASME. 39: 75-80, 1970.
[7] Keer, L. M., Lee, J. C., and Mura, T.: Hetenyi-s elastic quarter space problem revised. International Jounal of Solids & Structures. 19: 497-508, 1983.
[8] Hanson, M.T., and Keer, L. M.: A simplifies analysis for an elastic quarter-space. Q. J. Mech. Appl. Math.. 43: 561-588, 1990.
[9] Guilbault, R., Gosselin, C. and Cloutier, L.: Express model for load sharing and stress analysis in helical gears. ASME Journal of Mechanical Design. 127: 1161-1172, 2005.
[10] Guilbault, R.: A fast correction for elastic quarter-space applied to 3D modeling of edge contact problems. Journal of Tribology. 133: 031402, 2011.
[11] Gerber, C. E.: Contact problems for the elastic quarter plane and the quarter space, Doctoral dissertation, Stanford University, CA, U.S.A, 1968.
[12] Erdogan, F. and Gupta, G.D.: Contact and crack problems for an elsatic wedge, International Journal of Engineering Science. 14: 155-164, 1976.
[13] Hanson, M .T., and Keer, L. M.: Stress analysis and contact problems for an elastic quarter-plane. Q. J. Mech. Appl. Math.. 42: 363-383, 1989.
[14] Keer, L.M., Lee, J.C. and Muta, T.: A contact problem for the elastic quarter space. International Journal of Solids & Structures. 20: 513-524, 1984.
[15] Bosakov, S.V.: Ritz-s method in the contact problems of the theory of elasticity. Belarusian National Technical University (2007).
[16] Guenfoud, S., Bosakov, S.V. and Laefer, D.F.: A Ritz-s method based solution for the contact problem of a deformable rectangular plate on an elastic quarter-space. Internatoinal Journal of Solids & Structures. 47: 1822-1829, 2010.
[17] Yan, W. and Fischer, F.D.: Applicability of the Hertz contact theory of rail-wheel contact problems. Archive of Applied Mechanics. 70: 255-268, 2000.
[18] Chen, Y.C.: The effect of proximity of a rail end in elastic-plastic contact between a wheel and a rail. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 217: 189-201, 2003.
[19] Chen, Y.C., and Kuang, J.H.: Contact stress variations near the insulated rail joints. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 216: 265-274, 2002.
[20] Wen, Z., Jin, X. and Zhang, W.: Contact-impact stress analysis of rail joint region using the dynamic finite element method. Wear. 258: 1301-1309, 2005.
[21] Cai, W., Wen, Z., Jin, X. and Zhai, W.: Dynamic stress analysis of rail joint with height difference defect using finite element method. Engineering Failure Analysis. 14: 1488-1499, 2007.
[22] Sandström, J., and A Ekberg, A.: Numerical study of the mechanical deterioration of insulated rail joints. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 223: 265-273, 2008.