Adhesion-creep Curve Characteristics of Wheel/Rail under Various Conditions

doi:10.3901/JME.2019.10.151

Abstract

Abstract: The wheel/rail adhesion-creep curves under different surface conditions and normal forces are measured on a wheel/rail rolling contact apparatus through a continuous varying creep ratio test method. The peak positions and initial slopes of the measured adhesion-creep curves in different tests are investigated through two numerical fitting strategies. The results indicate that there are big differences of the adhesion-creep curves under different conditions. Compared to the dry condition, water and oil conditions not only drop the adhesion coefficient obviously but also move the peak points to the left of the curves. Sanding under water or oil condition could efficiently improve the degraded adhesion coefficient and lead the right movement of the peaks in the curves. Under dry condition, the increase of normal force affects little on the adhesion coefficient and peak position, but could descend the initial slopes of the adhesion-creep curves. Under water and oil conditions, the increase of normal force leads the left movement of the peaks in the curves. In addition, significant decrease of adhesion coefficient could also be observed with the increased normal forces under water condition. After sanding, both the adhesion coefficient and the peak position are less affect by the increased normal force, while the initial slopes of the adhesion-creep curves are reduced obviously. The combination of this experiment and numerical strategies to achieve the character parameters of the adhesion-creep curves could make good references for future studies.

Key words: adhesion-creep curve, normal force, surface conditions, wheel/rail adhesion

CLC Number:

TH117

SHI Lubing, LI Qun, GUO Jun, WANG Wenjian, LIU Qiyue. Adhesion-creep Curve Characteristics of Wheel/Rail under Various Conditions[J]. Journal of Mechanical Engineering, 2019, 55(10): 151-157.

References

[1] CARTER F W. On the action of a locomotive driving wheel[J]. Proceedings of the Royal Society of London,1926,112(760):151-157.
[2] VERMEULEN P J,JOHNSON K L. Contact of nonspherical elastic bodies transmitting tangential forces[J]. Journal of Applied Mechanics,1964,31(2):338-340.
[3] SHEN Z,LI Z. A fast non-steady state creep force model based on the simplified theory[J]. Wear,1996,191(1-2):242-244.
[4] KALKER J J. The simplified theory of contact[M]. Dordrecht:Springer,1990.
[5] KALKER J J,JOHNSON K. Three-dimensional elastic bodies in rolling contact[M]. Dordrecht:Springer,1990.
[6] KALKER J J. A fast algorithm for the simplified theory of rolling contact[J]. Vehicle System Dynamics,1982,11(1):1-13.
[7] POLACH O. Creep forces in simulations of traction vehicles running on adhesion limit[J]. Wear,2005,258(7-8):992-1000.
[8] NAGASE K. A study of adhesion between the rails and running wheels on main lines:Results of investigations by slipping adhesion test bogie[J]. Proceedings of the Institution of Mechanical Engineers,Part F:Journal of Rail and Rapid Transit,1989,203(16):33-43.
[9] FLETCHER D I,LEWIS S. Creep curve measurement to support wear and adhesion modelling,using a continuously variable creep twin disc machine[J]. Wear,2013,298-299(1):57-65.
[10] ZHANG W H,CHEN J Z,WU X J,et al. Wheel/rail adhesion and analysis by using full scale roller rig[J]. Wear,2002,253(1-2):82-88.
[11] JIN X S,ZHANG W H,ZENG J,et al. Adhesion experiment on a wheel/rail system and its numerical analysis[J]. Proceedings of the Institution of Mechanical Engineers,Part J:Journal of Engineering Tribology,2004,218(4):293-304.
[12] WANG W J,WANG H,WANG H Y,et al. Sub-scale simulation and measurement of railroad wheel/rail adhesion under dry and wet conditions[J]. Wear,2013,302(1-2):1461-1467.
[13] 王文健,郭火明,刘启跃,等. 水油介质下研磨子对轮轨增黏与损伤影响[J]. 机械工程学报,2015,51(5):71-75. WANG Wenjian,GUO Huoming,LIU Qiyue,et al. Effect of abrasive block on improving adhesion and damage of wheel/rail under the water and oil conditions[J]. Journal of Mechanical Engineering,2015,51(5):71-75.
[14] 王文健,郭俊,刘启跃. 不同介质作用下轮轨粘着特性研究[J]. 机械工程学报,2012,48(7):100-104 WANG Wenjian,GUO Jun,LIU Qiyue. Study on adhesion characteristic of wheel/rail under different medium conditions[J]. Journal of Mechanical Engineering,2012,48(7):100-104.
[15] VOLLEBREGT E A H. Numerical modeling of measured railway creep versus creep-force curves with CONTACT[J]. Wear,2013,314(1-2):87-95.
[16] FLETCHER D I. LA new two-dimensional model of rolling-sliding contact creep curves for a range of lubrication types[J]. Proceedings of the Institution of Mechanical Engineers,Part J:Journal of Engineering tribology,2012,227(6):529-537.
[17] ZHU Y,LYU Y,OLOFSSON U. Mapping the friction between railway wheels and rails focusing on environmental conditions[J]. Wear,2015,324-325:122-128.
[18] CHEN H,ISHIDA M,NAMURA A,et al. Estimation of wheel/rail adhesion coefficient under wet condition with measured boundary friction coefficient and real contact area[J]. Wear,2011,271(1-2):32-39.
[19] WANG W J,LIU T F,WANG H Y,et al. Influence of friction modifiers on improving adhesion and surface damage of wheel/rail under low adhesion conditions[J]. Tribology International,2014,75:16-23.
[20] 申鹏,王文健,张鸿斐,等. 撒砂对轮轨粘着特性的影响[J]. 机械工程学报,2010,46(16):74-78 SHEN Peng,WANG Wenjian,ZHANG Hongfei,et al. Effect of spraying sand on adhesion characteristic of wheel/rail[J]. Journal of Mechanical Engineering,2010,46(16):74-78.
[21] GELINCK ERM. Mixed lubrication of line contacts[D]. Enschede:University of Twente,1999.