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- Autors
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Volchenko O. I., Vudvud O. M., Voznyi A. V., Semenii O. M., Snurnikov V. I.
- Issue
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Hoisting and transport equipment, 2025, №2(70)
- Pages
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70-81
- DOI
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10.15276/pidtt.2.70.2025.07
- Abstract
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In the course of research and development and experimental studies aimed at studying the operation of metal friction elements of brake devices, important results were obtained. In particular, it was found that the design of a brake disc with different thicknesses of its working wall contributes to the formation of a negative temperature gradient in depth on the friction belt. This, in turn, significantly activates the process of heat transfer to the bulk of the disc due to better thermal conductivity. In addition, the application of the momentumless shell theory made it possible to analytically determine the axial deformations of the friction belt under various design parameters and taking into account the influence of taper angles. During braking, reactions occur in the clamped part of the disk that affect the deformation state of the friction belt, causing local bends and stresses that rapidly decrease with distance from the disk edge. As a result of the research, new methods have been developed to increase the reliability and durability of friction pairs, in particular by preventing the formation of cracks during the operation of brake systems.As part of further research, the analysis of thermal and mechanical processes accompanying the operation of variable thickness discs was in-depth. It was found that such a design achieves optimal heat distribution and reduces the risk of thermal destruction of the surface layer, which is especially important for heavily loaded brake systems. Additionally, analytical models have been refined that take into account not only the geometric characteristics of the disc but also the effect of dynamic loads during braking. The experiments have confirmed the validity of theoretical calculations and indicated the need for further improvement of friction element designs to achieve better performance. The proposed measures and technical solutions are aimed at improving the performance of braking systems and minimizing the likelihood of cracks in the contact zones, which increases their safety and efficiency in various operating modes.
- Keywords
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brake device, friction pairs, metal friction element, performance, crack formation.
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