DEFORMATIONAL BEHAVIOR OF THE FLAT SLIDING LAYER OF THE SPHERICAL BEARING

Analysis of the friction properties of modified PTFE is performed, the functions describing the change in the friction coefficient depending on the pressure level with a maximum error from the experiments results less than 1% are proposed in the work. The influence of friction on the deformation behavior of the flat sliding layer of the spherical bearing on a periodicity cell model is considered. The geometrical configuration of the flat sliding layer with truncated spherical hole for the lubricant is considered. The periodicity cell includes one hole for lubrication. A series of numerical experiments for three options for the thickness of the sliding layer from 4 to 8 mm with a recess for the lubricant, in the unfavorable case the absence of lubricant is performed. The pattern of geometric configuration hole change with increasing pressure level is established. It was found that an increase of the antifriction layer thickness leads to a less significant deformation of the sliding layer thickness and the spherical hole. The sliding layer with a thickness of 8 mm has the smallest level minimum stress intensity and the material volume with the maximum stress intensity is minimal for this variant of the sliding layer thickness compared to other variants. The maximum integral stiffness of the 8 mm sliding layer decreased slightly by 1.74 and 1.5% on contact without and with lubricant respectively