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10 results on '"Stelmakh, Oleksandr"'

3. Traffic Lane Congestion Ratio Evaluation by Video Data

Author

Stetsenko, Inna V., Stelmakh, Oleksandr, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Palagin, Alexander, editor, Anisimov, Anatoliy, editor, Morozov, Anatoliy, editor, and Shkarlet, Serhiy, editor

Published
2020
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4. Criteria for Evaluating the Tribological Effectiveness of 3D Roughness on Friction Surfaces.

Author

Stelmakh, Oleksandr, Fu, Hongyu, Kolienov, Serhii, Kanevskii, Vasyl, Zhang, Hao, Hu, Chenxing, and Grygoruk, Valerii

Subjects
SURFACE roughness, SURFACE finishing, FRICTION, SURFACE texture, SLIDING wear, SURFACES (Technology), TEST methods
Abstract

A new technique for finishing the surfaces of friction pairs has been proposed, which, in combination with the original test method, has shown a significant influence of the initial roughness configuration (surface texture) on friction and wear. Two types of finishing processing of the shaft friction surfaces were compared, and it was found that the friction and wear coefficients differ by more than 2–5 and 2–4 times, respectively. Based on a new methodology for analyzing standard roughness parameters, the tribological efficiency criteria (in the sense of reducing friction and wear) are proposed for the initial state of the friction surface of a radial plane sliding bearing shaft relative to the friction direction, which is consistent with its frictional characteristics. Comparison of the laboratory test results with the surface tribological efficiency criteria showed that these criteria are very promising for controlling existing technologies and optimizing new technologies for friction surface finishing in various friction systems. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Study on Oil Supply Characteristics of Connecting Rod Small End Bearing with Splash Lubrication by Smooth Particle Hydrodynamics (SPH) Method

Author

Niu, Penghao, Fu, Hongyu, Zhang, Hao, Guo, Yiqiao, and Stelmakh, Oleksandr

Abstract

The lubricating oil distribution significantly impacts the lubrication and cooling of the connecting rod small end bearing during the splash lubrication. This study investigates the oil supply for the small end bearing with splash lubrication utilizing the Smoothed Particle Hydrodynamics. The oil distribution and inlet volume are analysed under various engine speeds. The results reveal that the oil moves close to the piston surface and hardly enters the oil bores, resulting in oil wastage. The oil entering the bores might be thrown out due to the inertia, causing the oil inlet volume to fluctuate. With increasing engine speeds, the total oil inlet volume under the quasi-steady state gradually diminishes, exacerbating the lubrication conditions.

Published
2023
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