Stress-strain state of a conveyor belt with cables of different rigidity and their breakages

  • I. Belmas Dniprovsk State Technical University
  • D. Kolosov National Mining University
  • O. Bilous Dniprovsk State Technical University
  • S. Onyshchenko National Mining University
Keywords: conveyor belt; reinforcing cables; cable rigidity; deformation; stress; cable breakage


A stress-strain state of a belt in which the rigidity of cables changes discretely is investigated. In a cross-section of rigidity change a rupture of its continuity is present. This situation simulates the stress state of a belt in which during the repair of a reinforcement system part of a broken cable is replaced by a part of another cable. The belt is considered to be a layered composite structure with rigid (cables) and soft (rubber) layers. A belt model is constructed and analytically solved. Analytical expressions for displacements of cables, internal tensile forces are obtained. A character of distribution of forces and displacements of cables corresponds to Saint-Venant principle. It is shown that the character of placement of a cable of different rigidity and the total number of cables in a belt affect maximum stresses. A placement of a cable of different rigidity significantly affects maximum values of a stress-strain state of a belt with cable breakage when there are no more than four cables between it and the rope edge. Rigidity reduction of a broken cable leads to a decrease in both maximum load forces of cables and displacement angles of rubber between them. Reduced cable rigidity along the entire length of a belt leads to the lowest values of maximum forces and angles of displacement. The change in cable rigidity affects the load of adjacent cables and stresses in adjacent rubber layers the most. In a case of symmetrical cable placement in a belt, the values of extreme internal loads of cables adjacent to it coincide. Obtained analytical expressions of conditions of strength of cables and rubber layers allow determining the admissibility of usage of cables of different rigidity for repair of a belt reinforcement system.


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Belmas, I., Kolosov, D., Bilous, O., & Onyshchenko, S. (2018). Stress-strain state of a conveyor belt with cables of different rigidity and their breakages. Fundamental and Applied Researches in Practice of Leading Scientific Schools, 26(2), 231-238. Retrieved from