20.500.12556/RUL-135186 Experimental and numerical analysis of laminated carbon fibre-reinforced polymer gears with implicit model for coefficient-of-friction evaluation Laminated composites have so far received little attention as a potential material for gear drive applications. In the presented study, the thermomechanical performance of a newly developed type of epoxy impregnated, autoclave-cured carbon fibre-reinforced polymer gear-running in pair with a steel pinion-was analysed, using a combination of experimental and numerical approaches. The employed methods enabled the identification of the composite’s mechanical, thermal, and tribological characteristics, as related to the studied gear pair application. A newly proposed, finite-element-analysis-based iterative procedure enabled an implicit evaluation of the analysed material pair’s coefficient of friction (COF), which is a key parameter in determining the gear pair’s thermomechanical characteristics. For the considered material pair, a value of 0.34 was identified for the coefficient in the quasi-steady region. As the coefficient is strongly correlated with frictional heat generation and significantly affects the surface shear stress, it can consequently have a meaningful influence on the composite’s wear rate. The developed COF identification procedure was validated using a reciprocating cylinder-on-flat tribological test method. The composite gear’s service life was additionally tested at various running loads, resulting in pitch contact pressures ranging between 400 and 540 MPa. Lifetime gear test results showed a markedly superior performance compared to the high-temperature thermoplastic polyether ether ketone, which is typically employed in the most demanding polymer gear applications. Several methods are additionally proposed that could further improve the developed composite gears’ performance. carbon fibre thermomechanical analysis finite element method mechanical testing composites autoclave ogljikova vlakna termo mehanska analiza metoda končnih elementov mehansko preizkušanje kompoziti avtoklav true false true Angleški jezik Slovenski jezik Članek v reviji 2022-02-28 10:32:54 2022-02-28 10:33:02 2022-09-14 04:12:03 0000-00-00 00:00:00 2022 0 0 Str. 246-262 iss. 1 Vol. 9 Feb. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 536:620.1/.2 2288-5048 96943363 RAZ_Cerne_Borut_2022.pdf RAZ_Cerne_Borut_2022.pdf 1 85FBA28F9F1FF59BEE9A41F66BC7C6C3 74d8bc6441ab12b58d1b78618c685b45870a0b09458d2717b1e1cdba672dc6b9 d1d8b76b-987a-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154080 https://academic.oup.com/jcde/article/9/1/246/6519880?guestAccessKey=8c494621-0291-4e65-9e0a-8293e63d36c0 1 2e209aae-9879-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154079 Fakulteta za strojništvo 0 0 0