435 https://doi.org/10.31713/m1117 STRESS-STRAIN STATE OF FLEXIBLE COMPOSITE TRACTIVE ELEMENT WITH CABLE BREAKAGES AT TUBULAR-SHAPED AND TRANSITIONAL AREAS Belmas, I.V. Dniprovsk State Technical University, Kamianske, Dr. Sc. (Tech.), Prof., Head of Department of Mechanical Engineering Technology, Ukraine Kolosov, D.L. Dnipro University of Technology, Dnipro, Dr. Sc. (Tech.), Associate Professor, Head of Department of Structural, Theoretical and Applied Mechanics, Ukraine Samusia, V.I. Dnipro University of Technology, Dnipro, Dr. Sc. (Tech.), Professor, Head of Department of Mining Mechanics, Ukraine Kolosov, A.L. LLC “Antes”, Korolyov, Cand. Sc. (Tech.), Assoc. Prof., Design Engineer, Russian Federation Onyshchenko, S.V. Dnipro University of Technology, Dnipro, Cand. Sc. (Tech.), Associate Professor of Department of Structural, Theoretical and Applied Mechanics, Ukraine Abstract. The purpose of research is establishment of dependencies of the stress-strain state of a rubber-cable rope on its mechanical parameters and geometric parameters of a part where a flat rope gets a tubular shape considering the influence of a cable base breakage. Research methodology is construction of analytic models of interac- tion of cables in a rubber-cable rope as a composite structure, created from parallel cables regularly placed in one plane that interact through a layer of rubber, using the methods of mechanics of composite materials. Obtaining analytical dependencies in closed form for establishing the parameters of a stress-strain state of a rope in a part where it gets a tubular shape, which allows determining upper and lower boundaries of stresses in cables and in a rubber layer of a rope. Mathematical formulation of the process is based on the principles of mechanics of layered structures with hard and soft layers. Mathematical models were developed and investigated, what allows defining the boundaries of a stress-strain state of a flat rubber-cable rope, which gets a spatial shape of a cylinder. Obtained results allow predicting running abilities of a