Transverse Crack Propagation Characteristics of Rail Bottom under Wheel-Rail Force

Abstract:

The finite element model of multi-span continuous beam track is established to research the stress and strain fields of rail under the wheel-rail force. On this basis, according to the practical observation of crack shape, a three-dimensional semi-elliptical crack model was established, the singular element method was employed to simulate the stress field singularity of crack tip, and the transverse crack propagation characteristics of rail bottom under wheel-rail force was studied. The results show that: with the increase of wheel-rail force (vertical, lateral and longitudinal force), K_I shows an increasing trend, and with the increase of lateral force, the increase rate of K_I is maximum; with the increase of vertical force, both of the K_II and K_III show a decreasing trend. However, with the increase of lateral and longitudinal force, both of them show an increasing trend. From the range of stress strength factor of crack tip, the amplitude of K_I at the crack tip of rail outer edge is maximum , but the crack tip amplitude of K_II and K_III is maximum at partial to the rail centerline.

• Periodical: Applied Mechanics and Materials (Volumes 444-445)
• Pages: 1318-1325
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.444-445.1318
• Online since: October 2013
• Authors: Jian Xi Wang, Ji Rong Gui, Si Yi Chen
• Keywords: Finite Element Analysis (FEA), Rail, Rail Bottom Transverse Crack, Railway Engineering, Stress Intensity Factor (SIF), Wheel-Rail Force

References

[1] F. S. Meng, Cause Analysis and Prevention Measures for the Track Fracture, Railway Construction Technology. (2010) 58-62.

[2] J. M. Wang, Rail Service State Analysis and Safety Control for UIC60, Journal of Shanghai Railway Technology. (2000) 16-18.

[3] J. H. Deng, D. Y. You, X. N. Guo, Fracture Analysis of Rail in a Bridge, PTCA (PART A：Physicai Testing ). 10(2004) 135-137, 162.

[4] George Kotsikosa, Marzio Grassob, Assessment of Fatigue Cracks in Rails, Procedia - Social and Behavioral Sciences. 48 (2012)1395-1402.

DOI: 10.1016/j.sbspro.2012.06.1115

[5] David Y. Jeong, Michael E. Carolan, Hailing Yu, etal. Fracture Mechanics and Beam Theory Analyses of Semi-elliptical Cracks Originating in the Base of Rail. Proceedings of the 2012 Joint Rail Conference, Philadelphia, Pennsylvania, USA, April 17-19, (2012).

DOI: 10.1115/jrc2012-74027

[6] L. F. M. da Silva1, D. J. Stewardson, F. M. F. de Oliveira, Fatigue crack growth of rails for railways, Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 217 (2003) 89-97.

DOI: 10.1243/095440903765762832

[7] Heshmat A. Aglan, Mahmood Fateh, Fracture and Fatigue Crack Growth Analysis of Rail Steels, Journal of Mechanics of Materials and Structures, 2(2007)335-346.

DOI: 10.2140/jomms.2007.2.335

[8] Q. T. Liu, Y. P. Li, Determination and analysis of the expand rate da/dN of fatique cracks in U71Mn steel, Journal of the China Railway Society. 25(2003)29-31.

[9] R. D. Henshell, K. G. Shaw, Crack tip finite elements are unnecessary, International Journal for Numerical Methods in Engineering. 9(1975)495-507.

DOI: 10.1002/nme.1620090302

[10] S. Roshdy Barsoum, On the use of isoparametric finite elements in linear fracture mechanics, International Journal for Numerical Methods in Engineering. 10(1976)25-37.

DOI: 10.1002/nme.1620100103

[11] B. S. Tian, Survey of the 2011 Technical Seminar of Experts and Meeting of Council of the International Heavy Haul Association, Foreign Rolling Stock. 50(2012): 1-5.