Data for: Surface initiation of rolling contact fatigue at asperities considering slip, shear limit and thermal elastohydrodynamic lubrication

Published: 30 April 2019| Version 1 | DOI: 10.17632/b7ncpn3tn7.1
Contributor:
Carl-Magnus Everitt

Description

Data from a single asperity passing through a thermal elastohydrodynamic, TEHL, contact. The aim of the simulations is to clarify the loading conditions of asperities passing through thermal elastohydrodynamic lubricated contacts. The Figs 10 to 14 in C.-M. Everitts and B. Alfredssons article ‘Surface initiation of rolling contact fatigue at asperities considering slip, shear limit and thermal elastohydrodynamic lubrication’ was derived from the uploaded data. The numerical method used to obtain the data along with all input parameters used is presented in that article. The uploaded dataset contains two zip files containing data from one simulation each. The loading conditions were the same for both simulations except for the speed of the surfaces. In the first file, the speed of the surface with the asperity was 8 m/s while in the second zip file the speed of the asperity surface was 9 m/s. Note that the mean entrainment speed was 8.5 m/s in both simulations yielding different slip conditions for the two data sets. Each zip file contains the data from one TEHL-simulation divided into four separate results files. One data file contains the pressure, one the film thickness, one the temperature of the lubricant and the last the temperature of the metal body with the asperity. Each file contains the data from 3 steps where the grid size was gradually refined, then 10 steps when the time dependence was gradually introduced. Thereafter it is 514 time steps containing the information of the loading of the asperity as it passed through the TEHL contacts. Included in the folder is also a Matlab script reading and visualizing the data. The structure of the files is that the data from each simulation step is added after each other. For the pressure, the film thickness and the temperature of the lubricant each row represent the transverse direction and each column represents the rolling direction. The first row of each step contains the location of the nodes in the transverse direction and the first column contains the data of the nodes in the rolling direction. The structure of the metal temperature is such that each step contains the temperature of 39 layers. For each layer, the structure is the same as for the files mentioned before, with the rows representing the transverse direction and the columns the rolling direction, and the first row and column containing information about the node positions. For the spacing in the vertical direction, the reader is referred to the article ‘Surface initiation of rolling contact fatigue at asperities considering slip, shear limit and thermal elastohydrodynamic lubrication’ by C.-M. Everitt and B. Alfredsson.

Files