Влияние тонкостенности на НДС профильных соединений с натягом

Abstract

In machines and technological equipment for transmitting significant axial forces and torques, the connection of parts by interference fit is widely used. Such joints allow the transmission of significant axial forces and torques. An interference fit is used to connect various structural elements to the shaft instead of key, bolt and welded joints. They are more economical and rational in comparison with, for example, keyed joints, and the risk of a significant stress concentration in the places of keyed grooves also disappears. The strength of the connection in stationary fit is achieved due to the elastic, and sometimes also plastic deformation of the parts to be joined that occurs during the assembly process. The strength and relative immobility of such joints is ensured by the forces offriction between the mating parts, due to the magnitude of the interference fit. The aim of this work is to assess the dependence of thede-flected mode of different types of profile joints with interference. The connections of round bushings with round, elliptical and hex-agonal holes with shafts of the corresponding shape were investigated. Based on the ANSYS PC, the results were obtained, presented in the form of tables and graphs for the total displacements, contact pressures and equivalent stresses. The dependence of the deflected mode of the profile compounds of the indicated types on the thin-walled factor is shown. The practical significance of the obtained results consists in assessing the strength of the interference fit having a different shaft shape and their suitability for use.