Dyrda V.I., Kobets A.S., Lysytsia M.I., Zabolotna O.Yu., Tverdokhlib T.O., Kalhankov Ye.V., Chernii O.А., Ahaltsov H.M. Nanomaterials in the mechanics of deformed solids on the example of rubber linings of drum ball mills

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Parent Category: Geo-Technical Mechanics, 2021

Category: Geo-Technical Mechanics, 2021, Issue 157

Geoteh. meh. 2021, 157, 131-139

https://doi.org/10.15407/geotm2021.157.131

 

NANOMATERIALS IN THE MECHANICS OF DEFORMED SOLIDS ON THE EXAMPLE OF RUBBER LININGS OF DRUM BALL MILLS

¹Dyrda V.I., ²Kobets A.S., ¹Lysytsia M.I., ¹Zabolotna O.Yu., ¹Tverdokhlib T.O., ²Kalhankov Ye.V., ²Chernii O.А., ¹Ahaltsov H.M.

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, ²Dnipro State Agrarian and Economic University

UDC 678.4.06:539.51

Language: Ukrainian

Abstract. In the paper, the history of the origin and use of nanomaterials is studied with focusing on the most promising. It is stated that fullerenes discovered in 1985 have a positive effect on the condition and life expectancy of rodents and plants, and fullerenes are the most commonly used for modifying various materials. The main feature of fullerenes is their high reaction activity. They easily capture atoms of other substances and form materials with fundamentally new properties.
Based on them, a new carbon stereochemistry was emerged, which allows the purposeful creation of new organic molecules and, consequently, substances with given shapes and properties. Fullerenes, at their small content, can significantly change the physical and mechanical properties of the material. An analysis of the literature in recent years has shown a significant expansion of the scope of fullerenes, as hundreds of papers and patents have been published and registered.
During the work, the rubber, which is used for the manufacture of rubber linings for the first stage of grinding in ball drum mills with fullerene C60 in the amount of 0.05 wt.f, was modified. The research was carried out on laboratory samples of cylindrical shape with a diameter of 100 mm and a height of 50 mm, as well as on rectangular samples made of lining plates, which had worked 9300 hours in a drum ball mill of the first stage of grinding. The hardness of the rubber was studied, which after modification became 5-7 % more elastic and is 68 units against the base 72 units.
The effect of C60 fullerene on the physical and mechanical properties of rubber was established, namely rubber without modification after 9300 hours of operation became more rigid due to the rubber aging, but it should be noted that aging occurs within 25-27 %, which is a good indicator for the entire period operation; rubber modified with fullerene C60 is slightly softer than the reference rubber by an average of 15 %. After operation, the rubber modified with fullerene also became harder but by 15-18 %. All these figures indicate a fairly good composition of the rubber.
Dissipation coefficient of the rubber modified with C60 fullerene was increased 20-25 %, which indicates an increase in the elasticity of rubber, and hence its survivability. Also, the studies shown good durability of the rubber modified with fullerene against thermal action: the samples, which were kept at a temperature of 100 (C for 72 hours, were aged by 20 %.
Keywords: nanomaterials, fullerenes, modification, rubber mixture, rubber lining, grinding, mill, dissipation, dissipation coefficient, physical and mechanical properties, aging.

REFERENCES:

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About the authors:

Dyrda Vitalii Illarionovych, Doctor of Technical Sciences (D. Sc.), Professor, Head of Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Kobets Anatolii Stepanovych, Doctor of Public Administration, Professor, Rector, Dnipro State Agrarian and Economic University, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Lysytsia Mykola Ivanovych, Candidate of Technical Sciences (Ph. D.), Senior Researcher, Senior Researcher in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Zabolotna Olena Yuriivna, Master of Science, First Category Engineer in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Tverdokhlib Tetiana Omelianivna, Master of Science, Researcher in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Kalhankov Yevhen Vasylovych, Master of Science, Senior Lecturer of Department “Reliability and repair of machines”, Dnipro State Agrarian and Economic University, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Chernii Oleksandr Anatoliiovych, Master of Science, Senior Lecturer of Department “Reliability and repair of machines”, Dnipro State Agrarian and Economic University, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Ahaltsov Hennadii Mykolaiovych, Master of Science, Junior Researcher of Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

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