Thermomechanical stability of elastomer elements of heavy vibromachines under long-term cyclic loading

Dyrda V.I., Cherniy A.А., Tolstenko A.V.

Authors:

Dyrda V.I., D. Sc. (Tech.), Professor (IGTM NAS of Ukraine),
Cherniy A.А., M.S. (Tech.) (DSAEU),
Tolstenko A.V., Ph. D. (Tech.) (DSAEU)

UDC 622.539.375:678

Language: Russian

Abstract.

In the article, heavy vibration machines with an elastomeric elastic suspension are considered. Such machines – vibrating screens, vibrating feeders, horizontal two-mass vibrating conveyors, vibro-mixers, etc. – usually operate in extreme conditions, i.e. under stationary cyclic loads and active influence of the external environment. Elastomeric elements introduced into the structural schemes of machines, have reduced vibration loading and sound pressure and increased the machine durability, reliability and safety. Recently, the achievements in the field of vibration technology in the most diverse areas of engineering are to some extent related to the use of elastomeric elements. The case is considered when, due to the dissipative heating of the elastomeric element under deformations of the pure shear, temperature inside the massif reaches a certain critical value, hence, leading to its failure. Mathematical dependencies are formulated, basing on which it is possible to analyze temperature regime of the rubber elements when the energy absorption coefficient of a material depends on the heating temperature and loading duration. The rubber damping properties are described by integral relations of the Volterra type and fractional-exponential kernels. Mathematical dependences are set up for determining the steady-state heating temperature of the studied parts depending on the loading frequency. The calculation results are compared with the experimental data. In terms of application, temperature stability of a piecewise linear elastic-hereditary connection of a one-dimensional oscillator is studied with allowance for the nonlinear thermomechanical effect.

Keywords:

elastomeric elements, temperature stability, dissipative heating, nonlinear system, Volterra integral relations

References:

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5. Kobetc, A.S., Dyrda, V.І., Sokol, S.P., Pugach. A.M., Tolstenko, O.V., Ovcharenko, Yu.M., Tіshchenko, L.M., Rіdnyi, R.V., Loveikіn, V.S. and Borhalenko, Yu.O. (2016), Detalі mashin. Navchalno-metodichnyi kompleks dystsyplіny [Machine parts. Educational and methodical complex of school], in Kobetc, A.S. and Dyrda, V.І. (ed.), Zhurfond, Dnipro, Ukraine.

About the authors:

Dyrda Vitaly Illarionovich, Doctor of Technical Sciences (D. Sc.), Professor, Head of Department of Elastomeric Component Mechanics in Mining Machines, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Cherniy Alexandr Anatolyevich, Master of Science, Senior Teacher, Dnepropetrovsk State Agrarian and Economic University (DSAEU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Tolstenko Alexandr Vasil’yevich, Candidate of Technical Science (Ph. D.), Associate Professor of Department «Reliability and repair of machinery», Dnepropetrovsk State Agrarian and Economic University (DSAEU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.