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Engineering, Energy, Transport AIC

space SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 2(113)

Published: 2021.06.29
DOI: 10.37128/2520-6168-2021-2


Description:
The journal solves the problems of creation and improvement of machinery and technologies for agriculture: 131 - Applied Mechanics, 132 - Materials Science, 133 - Industrial Engineering, 141 - Power Engineering, Electrical Engineering and Electromechanics, 208 - Agricultural Engineering.

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EVALUATION OF DEFORMABILITY OF MATERIAL OF PREPARATIONS DURING ROLLING

DOI: 10.37128/2520-6168-2021-2-3
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Volodymyr Mikhalevich – Doctor of Technical Sciences, Full Professor, Head of the Department of Higher Mathematics of the Vinnytsia National Technical University (95 Khmelnytske Shosse St., Vinnytsia, Ukraine, 21021, e-mail: mykhalevych@vntu.edu.ua, ).
Viktor Matviychuk – Doctor of Technical Sciences, Full Professor, Head of the Department of Electric Power Stations and Systems of the Vinnytsia National Agrarian University (3 Solnechna St., Vinnitsa, 21008, Ukraine, email: vamatv50@gmail.com, https://orcid.org/0000-0002-7837-5174).
Iryna Bubnovska – Assistant of Vinnytsia National Agrarian University (3 Sonyachna Street, Vinnytsia, Ukraine, 21008, e-mail: biana25100@gmail.com, https://orcid.org/0000-0002-3535-3127 ).

Annotation

The article presents the results of development and research of the technological process of cold forming rolling of aluminum billets. The main obstacle to the implementation of such processes is the danger of destruction of materials, which necessitated the study of the stress-strain state, plasticity and assessment of the deformability of the workpiece material. To experimentally determine the ductility of metals, a rolling method was developed, according to which the deformation of the free side surface of the cylindrical sample occurs under uniaxial tension. Increasing the degree of deformation and bringing the material to fracture is provided due to the increase in the radii of the rolls during rolling and deformation of the sample on the wedge. Analysis of the stress-strain state of the free side surface of the cylindrical workpiece was performed by the finite element method, which used a specialized engineering software package DEFORM 3D. As a result, a significant inhomogeneity of the stress-strain state in the deformation zone is established. The most severe stress state is observed on the free side surfaces of the workpiece, which causes the danger of its destruction in this area. The dependence between the relative compression of the workpiece during rolling and the intensity of deformation on its side surface is obtained, which allows to determine the limiting thickness of the workpiece before destruction. As a result of the assessment of the deformability of aluminum alloys during cold rolling, using the curves of limit deformations and the scalar criterion of deformation, the limits to the destruction of the intensity of deformation and the limit value of the relative compression of the workpiece. The use of constructed models makes it possible to determine the value of the used plasticity resource at intermediate stages of rolling.

Keywords: cold forming rolling, stress-strain state, plasticity, estimation of deformability of material, rolling on a wedge, intensity of deformations, relative compression.

List of references

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[4]    Ogorodnikov, V. A., Derevenko, I.A, Aliyeva, L.I. (2016). Resource of plasticity of metals at cold volume deformation. Monograph. https://ir.lib.vntu.edu.ua/bitstream/handle/123456789/14305/ova%20%281%29.PDF?sequence=1&isAllowed=y [in Ukrainian].
[5]    Mikhalevich, V.M. (1998).  Tensor models of damage accumulation. Vinnytsia: UNIVERSUM Vinnytsia. [in Ukrainian].
[6]    Grushko O.V. (2014). Maps of materials in cold processing by pressure. Vinnytsia: VNTU. [in Ukrainian].
[7]    Matviychuk, V.A., Aliev, I.S. (2009). Improving the processes of local rotational pressure treatment based on the analysis of the deformability of metals. Monograph. Kramatorsk: DGMA. [in Ukrainian].
[8]    Smirnov, V.K. (1982). [et al.]. "Methods for assessing the deformability of metal on the surface of the workpieces of the blades during a single-pass rolling according to the circle-oval scheme." Aviation industry, 5, 18–21. [in Russian].
[9]    Matviychuk, V.A.,  Mikhalevich, V.M.,  Dobranyuk, Yu. V., Bubnovska, I.A. (2006). "Method for determining the ductility of metals by rolling cylindrical specimens on a wedge", IPC G01N 3/08 (2006/01). № 109984, Sep.26. [in Ukrainian].
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[11]    Sevostyanov, I.V.,  Dobranyuk, Yu. V., Bubnovska, I.A, (2017). Development of rolling processes of curved billets made of aluminum alloys. Bulletin of Mechanical Engineering and Transport, VNTU, 2(6), 150–157. Regime access: https://vmt.vntu.edu.ua/index.php/vmt/issue/view/7.[in Ukrainian].
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About journal

Topics of the journal:

131 - Applied Mechanics

132 - Materials Science

133 - Industry engineering

141 - Power engineering, electrical engineering and electromechanics

208 - Agricultural engineering

The magazine "Engineering, Energy, Transport AIC" is included in the list of scientific professional editions of Ukraine on technical sciences

(Category "Б", Order of the Ministry of Education and Science of Ukraine dated 02.07.2020 №886)

Old version of site: http://tetapk.vsau.edu.ua, http://techjournal.vsau.org

Key information:
ISSN (print): 2520-6168
DOI: 10.37128/2520-6168

Certificate of state registration of mass media: No. 21906-11806 P dated 03/12/2016.

Founder of the journal: Vinnytsia National Agrarian University

Editor-in-chief: Oleksii Tokarchuk - Ph.D., Associate Professor, VNAU (Vinnytsia)

Deputy Editor-in-Chief: Natalia Veselovska - Doctor of Technical Sciences, Full Prof., VNAU (Vinnytsia)

Executive Secretary: Yuriy Polevoda- Ph.D., Associate Professor, VNAU (Vinnytsia)

Members of the Editorial Board:

Tokarchuk O.A. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Veselovska N.R. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Agrarian University

Polevoda Yu.A. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Jordan Todorov Maximov - Doctor of Technical Sciences, Full Professor, Technical University of Gabrovo (Bulgaria)

Bulgakov V.M. - Doctor of Technical Sciences, Full Professor, Acad. NAAS, National University of Life and Environmental Sciences of Ukraine

Hraniak V.F. - Ph.D., Associate Professor, Vinnytsia National Technical University

Ivanchuk Y.V. - Doctor of Technical Sciences, Associate Professor, Vinnytsia National Technical University

Iskovich-Lototsky R.D. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Technical University

Kupchuk I.M. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Sevostianov I.V. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Agrarian University

Spirin A.V. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Tverdokhlib I.V. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Tsurkan A.V. - Doctor of Technical Sciences, Associate Professor, Vinnytsia National Agrarian University

Yaropud V.M. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

 

Type of publication: journal

Kind of publication: scientific

Publication status: domestic

Year of foundation: 1997

Periodicity: 4 times per year

Volume: 18-20 conv. print. sheet (А4)

ISSN: 2520-6168 (print version), (online version)

Language of publication: (mixed languages) Ukrainian, Russian, English

The sphere of distribution and category of readers: national, foreign, faculty, scientists, entrepreneurs.

The periodical edition is included to the List of scientific professional publications of Ukraine on technical sciences, approved by order of the Ministry of Education and Science of Ukraine in 05.16.2016, No. 515.

The journal "Engineering, Energy, Transport AIC" is included in the "Catalog of Ukrainian Publications".

Subscription to the journal can be issued in each post office. The subscription index is 99720.

History of journal:

It was founded in 1997 under the title "Bulletin of the Vinnitsa State Agricultural Institute." According to the Decree of the Presidium of the Higher Attestation Commission of Ukraine of September 11, 1997, this publication received the status of a professional in which it is allowed to publish the main results of dissertation researches.

In 2001-2014 the journal published under the title “Collection of scientific works of Vinnytsia National Agrarian University. Series: Technical Sciences "(Certificate of State Registration of Mass Media KV No. 16644-5116 PR of 04/30/2010).

Since 2015 journal has title "Engineering, Energy, Transport AIC" (Certificate of State Registration of Mass Media No. 21906-11806 P dated 03/12/2016).