Vibrations in engineering and technology


Issue №: 2(105)

Published: 2022.08.30
DOI: 10.37128/2306-8744-2022-2

The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.

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DOI: 10.37128/2306-8744-2022-2-9
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Matviychuk Viktor – Doctor of Technical Sciences, Full Professor, Head of the Department of Electric Power Engineering, Electrical Engineering and Electromechanics, Vinnitsa National Agrarian University (3 Solnechna St., Vinnitsa, 21008, Ukraine, email: vamatv50@gmail.com)

Kolisnyk Mykola – Assistant Professor, Department of Electric Power Engineering, Electrical Engineering and Electromechanics, Vinnitsa National Agrarian University (3, Solnechna str., Vinnitsa, 21008, Ukraine, email: kolisnik30@gmail.com).

Andrii Shtuts – Assistant Professor, Department of Electric Power Engineering, Electrical Engineering and Electromechanics, Vinnitsa National Agrarian University (3, Solnechna str., Vinnitsa, 21008, Ukraine, email: shtuts1989@gmail.com).




The analysis of construction of curves of limiting deformations of metals is carried out in the work. It is established that traditional test methods, such as deposition and stretching of cylindrical specimens, do not ensure the constancy of the stress state, and therefore contribute to the history of deformation in the construction of curves. During deposition, there is an increase in the stress state due to the curvature of the lateral surface of the sample (barrel formation), which is caused by friction at the ends. And when stretched, the stress index also increases, as a result of the formation of the neck due to the loss of resistance to deformation. Therefore, measures were considered to ensure reliable results in the construction of curves of boundary deformations, excluding the influence of the history of deformation. When settling, such measures include the use of plastic, softer than the sample material, foil at the ends of the samples and the gradual removal of the edges of the hole at their ends by grinding or deposition without foil. In addition, the experimental-calculation method was considered, which involves the construction of ways of deformation and correction of the limit deformation using the criterion of deformability. When stretching, in the case of neck formation, the increase in deformation linearly depends on the ratio of the radius of curvature of the neck to its diameter. The equation by which the experimental-calculation method can take into account the influence of the neck on the increase of ultimate deformations is given. To experimentally determine the ultimate tensile deformation, a method of rolling cylindrical specimens on a wedge with rolls whose radii increase during rolling is proposed, which eliminates the appearance of the neck. Boundary strain curves can be constructed with sufficient accuracy for torsion and deposition test specimens, and tensile strain values are obtained using approximated dependences tested for different metals.

Keywords: limit deformation curves, compression, tension, rolling of specimens on a wedge.

List of references


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6. V.A. Matviychuk., V.M. Mikhalevich., Yu. V. Dobranyuk., I.A. Bubnovskaya., "Method for determining the plasticity of metals by rolling cylindrical specimens on a wedge", IPC G01N 3/08 (2006/01) . № 109984, September 26, 2016. [in Ukranian].

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8. A. Shtuts, M. Kolisnyk, V. Yavdyk. (2018). Improvement of processes of rolling stamping on the basis of investigation of technological parameters on the mechanics of workpieces formation. MOTROL. Commission of Motorization and Energetics in Agriculture. Р. 19-25. Lublin [in Poland].

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About journal

Topics of the journal:

The journal "Vibrations   in engineering  and technology" presents materials on the following issues

• Theory of processes and machines
• Mechanical Engineering and materialprocessing
• Processing and food production

The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine

(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)

Old version of the site: http://vibrojournal.vsau.edu.ua/

The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:



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Key information:
ISSN (print): 2306-8744
DOI: 10.37128/2306-8744

The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University

Kind of publication: journal
Type of publication : Scientific
Publication status: Domestic
Year of founding:
Periodicity: 4 times a year
Extent: 18.75 nominal printed pages
ISSN: 2306-8744 (printed version), (online)
Language of edition  : (mixed languages) Ukrainian, English
The scope of the distribution and the category of readers: national, foreign, teaching staff, scientists, businessmen.
Periodical is included in the list of scientific professional editions of Ukraine approved by the Order of Ministry of Education and Sciences of Ukraine from 21.12.2015 No. 1328.
The journal "Vibrations in engineering and technology" is included in the "Catalogue of periodicals of Ukraine".
Journal subscription can be executed in each post office department.
 Subscription Index is  99720.


Old version of site: http://vibrojournal.vsau.edu.ua/

History of journal:

In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published  94 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Kaletnik H.M  PhD , professor, academician NAAS is the chief editor of the "Vibrations in engineering  and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.