Dukhota O. Scientific and technical bases for durability increasing of elements of aviation tribomechanical systems in the conditions of fretting-contact interaction

The dissertation is devoted to the solution of the scientific and technical problem of increasing the durability of aviation tribomechanical systems elements operating in the conditions of fretting-contact interaction, by creating methods for the formation of functional surfaces and materials with necessary controllable properties and methods for estimating and predicting fretting-corrosion compatibility and wear resistance of tribosystem elements. The influence of the nature of the contact pair materials, contact geometry and fretting parameters on the regularities of fretting-corrosion wear is determined. The analytical-calculated method of estimating the fretting stability of the surface layers is developed. The method allows to analyze the change in the material state of the surface layer and to determine the energy conditions for its frictional destruction. A number of technological procedures aimed at increasing the durability of aircraft tribomechanical systems elements have been developed and proposed for practical use. It has been experimentally proved that one of the effective ways to achieve high wear resistance and contact strength of surfaces of triboelements operating in fretting-contact interaction is to create a working layer with a gradient macroheterogenic and discrete-type structures.