PSI - Issue 37

Junpeng Li et al. / Procedia Structural Integrity 37 (2022) 582–589 Junpeng Li/ Structural Integrity Procedia 00 (2021) 000 – 000

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microscopy. It is found that the prediction method for the coexistence of rail crack initiation and wear is in good agreement with the experiment, and the result is more accurate. The conclusions are as follows. (1) The surface crack length distribution is basically the same, distribution in 0.10~0.35mm, but the frequency distribution of crack length in different length intervals is different, when the number of load cycles is small, the cracks were basically distributed in the shorter length interval, and with the increase of the number of load cycles, the frequency of longer surface cracks showed a fluctuating development trend of increasing-decreasing-increasing. (2) The wear depth and their trend were basically the same by the test and simulation, when the load cycles below 2.0 × 10 5 . After the load cycle was more than 2.0 × 10 5 , some difference between the results by the two methods occurred with the increase of the load cycles. (3) The crack initiated at the sub-surface of the roller contact surface in the test, which was 0.034 mm deep to the contact surface. The predicted crack initiated at the sub-surface of the roller contact surface, which was 0.031mm deep to the contact surface. The predicted crack initiation depth is basically consistent with the test results. The relative error between the two was about 9%. (4) There are many states such as micro-pores and micro-cracks on the contact surface at the same time. Under different load cycle times, the proportion of each state is different, and the contact surface is always in a dynamic The authors would like to kindly acknowledge the support of the National Natural Science Foundation of China (51678445, 51878661), Key Project of Scientific and Technological Research and Development Program of China Railway (N2018G042), Key Project of Shanghai Science and Technology Commission (20dz1203100). References Zhang Yi, 2016. Rail selection method based on the competitive relationship between fatigue and wear. Shijiazhuang: Shijiazhuang Railway University. Yang Yun, 2019. Optimization of rail profile in curve section based on competition between fatigue and wear. Shijiazhuang Railway University. Magel E E, 2011. Rolling CONTACT fatigue: a comprehensive review. Maintenance of Way Ǥ Ringsberg J W, 2001. Life prediction of rolling CONTACT fatigue crack initiation. International Journal of Fatigue ǡ 23(7) ǣ 575-586. Wang Shaofeng, Zhou Yu, Xu Yude, et al, 2014. Simulation of rail critical plane fatigue parameters based on creep theory. Acta Sinica Sinica, (4): 65-70. Lu C ǡ Melendez J ǡ Martínez-Esnaola J M, 2018. A universally applicable multiaxial fatigue criterion in 2D cyclic loading. International Journal of Fatigue ǡ 110 ǣ 95-104. Lu C ǡ Nieto J ǡ Puy I ǡ et al, 2018. Fatigue prediction of rail welded joints. International Journal of Fatigue ǡ 113. Valentin L, Popov, 2011. Principles and applications of contact mechanics and tribology. Beijing: Tsinghua University Press. Archard J.F. ǡ ͳͻͺͲǤ Wear theory and mechanisms in Peterson M.B., Winer W.O. (eds) ǡ Wear Control Handbook ǡ ASME, New York ǡ USA ǡ 161-78. MC Burstow, 2004. A whole life rail model application and development for RSSB-continued development of an RCF damage parameter Ǥ Ramalho A, 2015. Wear modelling in rail – wheel CONTACT. Wear ǡ 330-331 ǣ 524-532. Iwnicki S D, 2009. The Effect of Profiles on Wheel and Rail Damage. International Journal of Vehicle Structures & Systems ǡ 81(1) ǣ 492 – 500. Li Z L ǡ Kalker J J,1998. Simulation Of Severe Wheel-rail Wear. Computers in Railways VI. Fletcher D I ǡ Hyde P ǡ Kapoor A, 2008. Modelling and full-scale trials to investigate fluid pressurisation of rolling CONTACT fatigue cracks. Wear ǡ 265(9) ǣ 1317-1324. B. Nielsen, C. J. Rasmussen, S. Scheriau, et. Al, 2016. Tracking down the origin of squates, Railway Gazette, 39-43. ZHOU Yu, HUANG Xuwei, WANG Shuguo, et al, 2019. Prediction of the coexistence of crack initiation and wear of rail considering the geometric irregularities of the track[J].Journal of Tongji University (Natural Science Edition), 47(11):1600. WU Qiang, 2017. Prediction of rolling contact fatigue crack initiation of rail transit in urban rail transit. Journal of Shanghai University of Engineering Science, 31(04):295. Zhou Y, Zhang J, Wang S F, et al, 2016. Simulation on Rail Head Crack Initiation Life Prediction Considering Rail Wear. Journal of the China Rail Way society, 38(7): 91-97. equilibrium process. Acknowledgements