Quasistatic Distinctive Features Of Setting A Strain Wave Problems During Friction And Wear-Out
Journal Title: Metallurgical and Mining Industry - Year 2018, Vol 10, Issue 3
Abstract
Purpose. Development of engineering methods for calculating moving contacting parts for friction and wear, taking into account the quasi-static flow of deformation-wave processes in the zone in front of the moving part. Methodology. To explain the effects of wave formation on contacting surfaces, a computational model is proposed in which the outer layer of interacting half-spaces is schematized in the form of two moving beams on an elastic base that have a finite length in the moving coordinate system and have hinge-fixed supports in the arrays of interacting parts. Differential equations of elastic lines of “hypothetical” beams are obtained. Practical methods for determining the number of half-waves and the height of microroughness appearing after the loss of longitudinal stability of “hypothetical” beams in the interaction of contacting parts have been developed. Findings. Methods for determining the tangential forces in the stretched and compressed parts of the “hypothetical” beam are proposed. The results are presented to determine the degree of undulation of the deformation microroughness of a compressed beam after losing its longitudinal stability, which are largely due to the high-speed mode of interaction of the parts. Originality of the work lies in the fact that the mechanism of formation of additional microroughnesses in details is revealed in their highspeed interaction. In addition, it has been established that the destruction of parts in friction is due primarily to the cyclic nature of the loading of the surface layers for all types of wear. Рractical value consists in achieving much greater reliability in performing calculations for friction and wear, taking into account the high-speed wave-like deformations of the surface layers (contacting parts) before and after losing their longitudinal stability. And also in more accurate prediction of the mechanism of destruction of surface layers of parts as a result of local dying of the material under the influence of tangential cyclic loads and the onset of the effect of fatigue dyeing of surface layers
Authors and Affiliations
Yu. A. Malinovskyi, G. V. Danilina, S. Yu. Datsenko, A. A. Condarets
Keywords
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