ASSESSMENT OF THE STRESS-STRAIGHTENING STATE OF COMPOSITE MATERIALS FOR SPHERICAL PLAIN BEARINGS

Abstract

A model of a spherical plain bearing made of composite materials for the expansion of a stress-strain state has been developed. The model allows to estimate the stress and safety margin of the spherical plain bearing elements. The structure of the bearing model is determined from the storage of high-engineering composite materials. The strength and reserve capacity of the stress-strain state machine in elements of composite materials from various combinations of bearing races at pressures of 3, 100 and 200 kN have been identified. The use of polymer composite materials Zedex ZX-324VMT and Iglidur TX1 on steel 95Х18Ш ensures a reduction in normal Mizer stress by 1.45 and by 1.27 times, equal to the same. with metal-polymer stitching. Depending on the internal and external frame of the spherical plain bearings of titanium alloy ВT-22, the normal stress according to Mizer in models with polymer composite materials Zedex and Iglidur change by 2.08 and 1.55 times, when aligned with metal-polymer stitching on steel. Modeling of the stress-strain state of the spherical plane bearings made of composite antifriction materials resulted in a change in the pressure stress on the surface balls of the bearing materials when replacing titanium alloys BT22 instead of bearing steel 95Х18Ш up to 20%, depending on the material and loading conditions

The results of stress-strain modeling indicate the effectiveness of using Zedex ZX-324VMT and Iglidur TX1 carbon fiber-reinforced polymer composite materials as wear-resistant antifriction composite materials for the outer race of spherical plain bearings. Replacing the steel race with a race made of surface-hardened titanium alloy provides more effective stress relaxation and an increase in the safety factor during modeling.