№66-11

Stress-strain state of flexible composite tractive element of irregular structure

I. Belmas¹, D. Kolosov², O. Dolgov², T. Chechel², O. Vorobiova²

¹ Dniprovsk State Technical University, Kamianske, Dnipro, Ukraine

² Dnipro University of Technology, Dnipro, Ukraine

Coll.res.pap.nat.min.univ. 2021, 66:116-124

https://doi.org/10.33271/crpnmu/66.116

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ABSTRACT

Purpose. Establishment of influence of irregular rope (belt) structure on its stress-strain state.

Methodology. Construction, solution of a model of a stress-strain state of a rubber-cable rope considering the irregularity of its structure and development of an algorithm for calculating a tractive and transporting element of a hoisting and transporting machine using the methods of mechanics of layered composite materials with soft and hard layers.

Results. Algorithm for determining a stress-strain state of a rubber-cable rope (belt) of irregular structure. Dependencies of stress-strain state of a rubber-cable rope (belt), in which cables of different structure or rubber layers made of rubber of different shear rigidity are used.

Scientific novelty. Establishment of influence of violation of regular rope (belt) structure on its stress-strain state.

Practical significance. The developed model and algorithm for calculating a stress-strain state of a rubber-cable rope of arbitrary structure, considering the differences in rigidity of its individual cables, can be used for different values of other mechanical and geometric parameters of rope (belt) components. The resulting algorithm can be considered sufficiently reliable and it allows justified determination of conditions for safe usage of rubber-cable ropes in case of breakage of a random cable. The obtained results provide a possibility of implementing rubber-cable ropes (belts) with mechanical and geometric characteristics variable along the width into hoisting and transporting engineering. The developed algorithm for determining a stress state of a rope or conveyor belt will increase the efficiency and competitiveness of domestic lifting and transporting equipment.

Keywords: stress-strain state, composite tractive element, irregular rope structure, hoisting and transporting machine.

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