Dyrda V.I., Kalgankov Ye.V., Tsanidy I.N., Cherniy A.А., Tolstenko A.V., Derkach O.D., Kabat O.S. Specificity of rubber-metal elements calculation with taking into account effect of bulk compression

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Geo-Technical Mechanics, 2018, Issue 138

Geoteh. meh. 2018, 138, 160-168

DOI: https://doi.org/10.15407/geotm2018.01.160

Specificity of rubber-metal elements calculation with taking into account effect of bulk compression

Dyrda V.I., Kalgankov Ye.V., Tsanidy I.N., Cherniy A.А., Tolstenko A.V., Derkach O.D., Kabat O.S

Authors:

Dyrda V.I., Dr. Tech. sciences, professor (IGTM NAS of Ukraine)

Kalgankov E.V, Post-Graduate Student (IGTM NAS of Ukraine)

I. Tsanidi, postgraduate student (IGTM NAS of Ukraine)

Cherniy A.A., graduate student (IGTM NAS of Ukraine)

Tolstenko A.V., Ph.D. Sciences, Associate Professor (ДДЭУ)

Derkach A.D, Ph.D. Ph.D., Ph.D., Associate Professor (DDAU)

Kabat A.S., Ph.D. Sciences, Associate Professor (DDAU)

UDC 622.73:621,926.002.75

Language:Ukrainian

Abstract.

In the article,massive rubber-metal elements made of medium-filled materials (30-60 mass fractions of carbon black) are considered. When load is harmonic, these elements demonstrate effect of physical nonlinearity even at small deformations. In this case, rubber dynamic characteristics depend on amplitude of stresses and deformations. When thin-film elements are used and ratio of radius of element R to the thickness of the rubber layer h_p (i.e. R/h_p) is sufficiently great, effect of bulk compression can occur. In this case, compression modulus K is much greater than the Young’s modulus, and this fact should be taken into account while calculating specific rubber-metal elements.

An algorithm for calculating the stiffness and dissipative parameters of the element is considered. Behavior of material volume is modeled by the hypothesis n = 0.495 (n is Poisson’s ratio), which is characteristic for elements made of weakly compressible elastomers.

Essence of the new computing method is introduction of universal constructive-deformation parameter b, which takes into account effects of physical nonlinearity and makes it possible to determine stiffness parameters and temperature of dissipative heating for elements of various configurations made of medium-weight rubber.

Parameters of the b type are quite convenient for researches: they are dimensionless, depend only on the element geometry and are the universal characteristic of the element. Coefficients b provide exhaustive information about behavior of the elements and also provide information on their design. That is, they are a design-and-deformation parameter, which characterizes deformation properties of the elements. At n = 0.5, stress state of the thin-layered elements is approximated to all-round compression, and value of the b also changes.

New technique of investigation and calculation of the stiffness and dissipative parameters of rubber elements for any arbitrary combined shear-compressive load are presented, as well as effect of nanomodifier – fullerene soot – on the rubber physical and mechanical characteristics is described.

The article presents results of experimental studies of cylindrical rubber-metal elements with different thickness of the rubber layer. Ratio R/h, at which effect of volume compression occurs, was determined. The article also presents results of experimental studies of rubber elements filled by 45 mass fractions of carbon black and modified fullerene-contained carbon black (10 % of fullerene C₆₀). It was experimentally established that dynamic characteristics of rubber at monophasic compression changed if fullerene soot was used.

Keywords:

rubber, rubber-metal element, dissipative heating, static stiffness, bulk compression, Poisson’s ratio, fullerene soot, nanomodifier, deformation.

References:

1. Dyrda, V.I. (1988), Prochnost i razrusheniye elastomernykh konstruktsiy v ekstremalnykh usloviyakh [Strength and destruction of elastomeric structures in extreme conditions], Naukova dumka, Kyiv, USSR.

2. Bulat, A.F., Dyrda, V.I., Zviagilskii, E.L. and Kobets, A.S. (2012), Prikladnaya mekhanika uprugo-nasledstvennykh sred. Tom 2. Metody rascheta elastomernykh detalei [Applied mechanics of elastic-hereditary media. Vol. 2. Design techniques of elastomeric parts], Naukova dumka, Kyiv, Ukraine.

3. Senchenkov, I.K., Dyrda, V.I., Kozlov, V.I., Tereshchenko, O.P. and Maznetcova, A.B. (1986), “Calculation of stationary oscillations and dissipative heating of nonlinear viscoelastic bodies under periodic loading”, Prikladnaja mehanika [Applied mechanics], no. 6, Kyiv, USSR.

https://doi.org/10.1007/BF00890607

4. Dyrda, V.I., Agaltsov, G.N., Novikova, A.V., Kalgankov, E.V., Tsanidi, I.N. and Dorohov, M.A. (2014) “Determination of physical and mechanical properties of the filled rubber”, Geo-Technical Mechanics, no. 116, Dnipro, Ukraine.

5. Leontieva, M.A. Klejmenova, N.L. and Igumenova, T.I. (2016), “Improving the quality of car tires based on nanocarbon”, Mezhdunarodnyj studencheskij nauchnyj vestnik [International Student Scientific Bulletin], no. 3. Moscow, RF.

About the authors

Dyrda Vitaly Illarionovich, Doctor of Technical Sciences (D. Sc.), Professor, Head of Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of 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.

Kalgankov Yevgeniy Vasilievich,Ph. D. Student in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of 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.

Tsanidy Ivan Nikolaevich,Ph. D. Student in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine

Cherniy Alexandr Anatolyevich, Ph. D. Student in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of 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.

Tolstenko Alexandr Vasilyevich, 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.

Derkach Oleksіi Dmitrovich, Candidate of Technical Science (Ph. D.), Head of Department of operation of the machine-tractor park Dnipro State Agrarian and Economic University (DSAEU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kabat Oleg Stanіslavovich, Candidate of Technical Science (Ph. D.), Associate Professor of Department of operation of the machine-tractor park Dnipro State Agrarian and Economic University (DSAEU), Dnipro, Ukraine

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