Ufa University of Science and Technology, Ufa, Russia

N. Yu. Dudareva, Professor at the Department of Internal Combustion Engines, Doctor of Technical Sciences, Associate Professor, e-mail: dudareva.nyu@ugatu.su

Central Scientific Research Automobile and Automotive Engines Institute NAMI, Moscow, Russia
A. V. Kolomeychenko, Head of the Advanced Technologies Department, Centre of Agricultural Engineering, Doctor of Technical Sciences, Professor, e-mail: a.kolomiychenko@nami.ru

Wuhan Textile University, Wuhan, China¹ ; Vladimir State University named after Alexander and Nikolay Stoletovs, Vladimir, Russia² ; National University of Science and Technology MISiS, Moscow, Russia³
V. B. Deev, Professor at the Faculty of Mechanical Engineering and Automation¹, Principal Researcher², Professor at the Department of Metal Forming³, Doctor of Technical Sciences, Professor, (Corresponding Author), e-mail: deev.vb@mail.ru

The authors of this paper used numerical modelling technique to look at the effect of ceramic coating formed on the surface of internal combustion engine piston crown on the level of stresses and strains in the piston material. The modelling was performed in SolidWorks Simulation. The following materials were used: for piston – hypereutectic aluminium piston alloy, for coating – ceramics. The properties of such ceramics were similar to the ones of micro-arc oxidation coatings. The surfaces of the model piston were subjected to mechanical and thermal loads corresponding to the ones experienced by the model engine. The effect of the coating thickness on the stress-strain state of the studied part was examined. The coating thickness was varied at 50 μm increments in the range of 50 to 300 μm. The modelling showed that the coating helped to significantly lower the level of stresses and strains in the most loaded points located in the centre of the piston crown. Thus, due to the coating the stress is decreased 8.6 times and the equivalent strain — 15.8 times. In the point located in the centre of the piston crown surface on the crankcase side, the stress is decreased 5.3 times and the strain — 6.1 times. Less distinguished changes were noted on the edge of the piston crown surface: due to the coating the stress there is 1.1 times lower and the strain — 1.6 times lower. This study helped understand that the coating thickness produces no considerable effect on the strains or stresses in the piston material. A 50 μm thick coating is sufficient to achieve the required effect.
This research was carried out as part of Governmental Assignment No. FEUE-2023-0007 (Ufa University of Science and Technology), with the funding provided by the Ministry of Science and Higher Education of the Russian Federation.

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