Abstract
The article examines the thermal behavior of five newly developed organic composite friction materials combined with a cast-iron railway brake disk during repeated braking. Bench tests were carried out in accordance with the established program, taking into account 15 braking and cooling cycles. In the next stage, the obtained braking parameters were implemented into a 3-D FE model of the brake. The main goal of the study was to determine an influence of important assumptions taken in computer simulations regarding contact conditions, cooling conditions, and the number of required brake components. The contact conditions included: 1) perfect thermal contact, 2) contact of rough surfaces taking into account thermal conductance, and 3) separate heating. The total duration of the analyzed multiple braking reached 7695 s, while the maximum distance covered during this time was 203.1 km. The results of numerical calculations were compared with experimental data obtained on the full-scale dynamometer test stand.
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