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Thermal stresses of the motor vehicle clutch and brake friction discs
Dragana Lazarević Zlatomir Živanović
During the friction discs work, great amount of heat is produced on the friction disc surfaces. This leads to thermal loads which, exceeded limited values, can cause serious problems during disk work. A research on thermal stresses on the frictional surfaces, arising under thermal load, presents a very complex task. The whole complexity of theoretical research of this problem based on existing literature notes is shown and some of the results obtained by solving complex mathematical equations are presented in the first part of this paper. The second part presents the results of friction disc testings on the test stand, based on which the thermal stress valuation is given. The possibility of thermal stress research by using modern program packs, such as Pro/Engineer, is also shown. It enables the simulation of the friction disc sliding process and the creation of the complete picture of the thermal stress level.
Key words: friction discs, thermoelastic instability, thermal stresses, theoretical analysis, experimental tests.
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