Thermography and Photoacoustic Techniques
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Abstract
Abstract
In this paper, a three-dimensional multi-body thermomechanical FE model of a pin-disc system with tribometer elements was developed. The model includes interactions between contact pressure, wear of the pin, and materials expansion due to temperature rise. The analyzed friction pair consists of a steel disc and a composite organic friction material cut from a railway brake block. Unlike standard approach, in which single FE simulation starts with perfectly flat surfaces, here three stages were considered with the temperature field and wear state adapted from the previous stage. After the last stage additional analysis with the tribometer arm raised (without contact between the pin and the disc) and with the rotating disc was performed. The pin temperature was measured using a K-type thermocouple and the disc temperature was estimated using a thermal imaging camera. The heat partition at different values of thermal contact conductance (TCC) and Charron’s heat partition coefficient (HPC) was studied. It was found that at TCC equal to 1000 W/(m 2 K), 2000 W/(m 2 K) and when setting the perfect thermal contact, the temperature of the disc calculated agreed well with the experimental data. Also the temperature of the pin calculated was on the similar level as from the measurements. However the composite friction material was more sensitive than the disc to changes in the contact conditions. Therefore additional study at the time-dependent TCC was conducted. The research allows for a better understanding of the thermomechanical behavior of the organic composite friction material-steel disc interface on a reduced scale.
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@article{Grze2026Analysis,
title = {Analysis of heat partition in a pin-on-disc system using a thermocouple, infrared thermography, and the finite element method},
author = {Piotr Grześ and Wojciech Tarasiuk and Rafał Zybała and Adam Adamowicz and М. Kuciej and Marcin Chmielewski and Anna Jagiełło-Bosiek and D. Rusinek},
journal = {Wear},
year = {2026},
doi = {10.1016/j.wear.2026.206922},
url = {https://doi.org/10.1016/j.wear.2026.206922}
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