DETERMINATION OF TIME CHARACTERISTICS FOR RUBBER ELEMENTS OF MACHINES WITH TAKING INTO ACCOUNT DEVELOPING DAMAGES

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Parent Category: Geo-Technical Mechanics, 2014

Category: Geo-Technical Mechanics, 2014, Issue 116

UDC 622.539.375

Authors:

Kobets A.S., D. Sc. (Ec.), Professor,

Sokol S.P., Ph. D. (Tech.) (DSAEU),

Tverdokhleb T.Ye., Engineer (IGTM NAS of Ukraine),

Tolstenko A.V., Ph. D. (Tech.)

Kolbasin V.A., Ph. D. (Tech.), Associate Professor,

Cherniy A.A., M. Sc. (Tech.) (DSAEU)

Abstract.

With the help of Walpole method, an algorithm was established for calculating time characteristics of rubber components of vibrating machines (mechanical screens, feeders, conveyors, etc.) working under durable cyclic loads. In the process of operation, damage accumulates in elastic links of such machines causing changes in such macro characteristics of the material as shear modulus and dissipation coefficient. The process of micro damage accumulation and development in the material is interpreted as formation of some areas in originally homogeneous material, which are a kind of inclusions, properties of which differ from those of the original material. In this paper, the Walpole method is used, which allows to determine effective (averaged by some volume of material) characteristics of rubber with developing damages. As a concrete example, dependences of coefficient of elasticity, effective Young’s modulus and dissipation coefficient on the damage are given.

Keywords:

rubber, time characteristics, Walpole method, effective modulus of the material

References:

1. Vakulenko, A.A. (1961), “On the connections between stress and strain in elastic media”, Issledovaniya po uprugosti i plastichnosti, no.1, pp. 3-35.
2. Chudnovskiy, A.I. (1973), “On fracture of macroscopic bodies”, Issledovaniya po uprugosti i plastichnosti, pp. 3-41.
3. Walpole, L.I. (1966), “On bounds for the overall elastic moduli of inhomogeneous system –I”, Journal of the Mechanics and Physics of Solids, vol. 14, no. 3, pp. 151-162.
4. Walpole, L.I. (1966), “On bounds for the overall elastic moduli of inhomogeneous system – II”, Journal of the Mechanics and Physics of Solids, vol. 14, no. 5, pp. 289-301.
5. Bulat, A.F., Dyrda, V.I., Zvyagilskiy, Ye.L., Kobets, A.S. (2011), Prikladnaya mekhanika uprugo-nasledstvennykh sred. Tom 1. Mehanika deformirovaniia i razrusheniia elastomerov [Applied mechanics of elastic-hereditary media. Vol. 1. Mechanics of deforming and breaking down of elastomers], Naukova dumka, Kiev, Ukraine.
6. Bulat, A.F., Dyrda, V.I., Zviagilskii, E.L. and Kobetc, A.S. (2012), Prikladnaya mekhanika uprugo-nasledstvennykh sred. Tom 2. Metody rascheta elastomernykh detalei [Applied mechanics of elastic-hereditary media. Vol. 1. Design techniques of elastomeric parts], Naukova dumka, Kiev, Ukraine.

About the authors:

Kobets Anatoly Stepanovich, Doctor of Economical Sciences (D. Sc.), Professor, Prex, Dnepropetrovsk State Agrarian and Economic University (DSAEU), Dnepropetrovsk, Ukraine

Sokol Sergey Petrovich, Candidate of Technical Sciences (Ph. D.), Senior Teacher of Dnepropetrovsk State Agrarian and Economic University (DSAEU), Dnepropetrovsk, Ukraine

Tverdokhleb Tatyana Yemelyanovna, Engineer, Researcher 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), Dnepropetrovsk, Ukraine

Tolstenko Alexandr Vasilyevich, Candidate of Technical Sciences (Ph. D.), Associate Professor of Department «Reliability and repair of machinery», Dnepropetrovsk State Agrarian and Economic University (DSAEU), Dnepropetrovsk, Ukraine

Kolbasin Alexandr Vladimirovich, Candidate of Technical Sciences (Ph. D.), Associate Professor, Dnepropetrovsk State Agrarian and Economic University (DSAEU), Dnepropetrovsk, Ukraine

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

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