Analysis of the Wheel/rail Surfaces Deformation Characteristics Based on Different Micro-contact Models

doi:10.3901/JME.2017.22.134

Abstract

Abstract: In view of the wheel/rail contact surfaces deformation, based on the different statistical micro-contact models including Greenwood-Williamson(GW) model, Chang-Etsion-Bogy (CEB) model and Zhao-Maietta-Chang (ZMC) model, a wheel/rail line-contact model under dry condition is used to predict the characteristics of the wheel/rail surfaces deformation of different micro-contact models. And the formulas of micro-contact models are solved by using the Newton-Raphson method, separation formulas and force balance equation simultaneously, which obtains the pressure distribution and the contact width of different micro-contact models under the different roughness and plasticity index. Comparison of the different contact models shows that the use of elastic-plastic micro-contact models (CEB, ZMC) predict a lower maximum normal pressure and a greater contact width to the elastic model (GW). The max contact pressure of the three models is smaller than max Hertz contact pressure and the contact width is a wider range.

Key words: contact pressure, contact width, micro-contact model, Newton-Raphson method, roughness, the wheel/rail contact

CLC Number:

U211

WU Tao, WU Bing, WEN Zefeng, JIN Xuesong. Analysis of the Wheel/rail Surfaces Deformation Characteristics Based on Different Micro-contact Models[J]. Journal of Mechanical Engineering, 2017, 53(22): 134-142.

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