DEVELOPMENT OF APPROACHES, METHODS AND MODELS OF RESEARCH OF DURABILITY AND LONGEVITY OF TORSION BILLOWS OF THE SUSPENSION SYSTEM THE LIGHT ARMORED VEHICLE

The analysis of materials on approaches, methods and models of research of strength and durability of torsion shafts of systems of suspension of light armored vehicle is carried out. It is concluded that despite the existing significant theoretical developments, the analysis of elastic-plastic deformation of materials of highly loaded structures, including torsion shafts, requires the development and adaptation of appropriate models. The approach to a number of studies on this issue also needs to be developed. As a result of a number of researches, the following model of stress-strain state was performed. The generalized parametric description of the stress-strain state of the torsion shaft contains varied design and technological factors and process parameters. The mathematical model of the stress-strain state of a torsion bar of incremental type has been formulated. It accounts for the contact and elasto-plastic deformation of the material of the torsion bar. At the same time, the stress-strain state depends on the loading history.  A parametric model provides advantages in justifying rational technical solutions. This applies to both design and technological solutions. Also, all significant factors at all stages of the life cycle of torsion bars are taken into account. These factors have significant interplay.  Ultimately, the determined design, technological and operational parameters satisfy the conditions of the increased strength and durability of torsion bars.  The mechanical and physico-mechanical properties of materials used to manufacture the torsion bars are another important factor with regard to these criteria.  Accordingly, a complex workflow is established in order to design and improve the torsion bars for the suspension systems of light armored vehicles with increased technical characteristics. Keywords: light armored vehicle; performance characteristics; torsion shaft; suspension systems; stress-strain state; strength; durability; elastic-plastic deformation