ANALYSIS OF CRACKS AT THE TORSION VALLARS CAUSED WITHOUT LOADING

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Published: Monday, 07 June 2021 19:35
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Volume 7 (3), June 2021, Pages 74-81

Tehran Mammadli

Master, Azerbaijan Technical University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0003-4212-7416 

ABSTARCT

 Nowadays, the hull suspension systems that use torsion shafts as elastic suspension elements are fitted to the majority of modern tracked vehicles. The main type of failure in such systems is the fracture of the torsion shafts due to the formation of fatigue cracks, which leads to failure of the suspension assemblies. This work presents an analysis of fracture toughness of torsion shafts of a standard tracked chassis used to develop a family of  multipurpose transport vehicles GT-TM, GT-TMS, etc. The analysis is carried out under an operating load level for a crack located on the cylindrical part of the torsion shaft, the plane of which is at an angle to the torsion shaft axis and coincides with the position of the main areas of the stress state. The calculation of fracture toughness is based on Irwin fracture criterion. The calculations of the maximum stress intensity factor along the crack front are performed using the finite element method in the ANSYS software package. The results of the analysis of fracture toughness are presented in the form of dependences of the critical depth of the crack on the ratio of the fracture half-length to its depth. The data obtained can be used to determine the residual life of torsion shafts of the tracked vehicles based on the chassis under consideration.

Keywords: suspension system, fracture toughness of torsion shafts, edge crack, stress intensity factor, finite element method, Irwin fracture criterion.

INVESTIGATION OF WAYS TO REMOVE OXIDE FILM FROM THE SURFACE OF METALS AND SOLDER MATERIALS IN THE SOLDERING PROCESS UNDER DIFFERENT CONDITIONS

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Published: Monday, 07 June 2021 19:32
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Volume 7 (3), June 2021, Pages 64-73

1Agali Guliyev, 2Aynur Sharifova, 3Svetlana Hajiyeva

1Associate Professor, “Mechanical Engineering and Materials Science”, Azerbaijan State Oil and Industry University, Doctor of Philosophy, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Assistant, “Mechanical Engineering and Materials Science”, Azerbaijan State Oil and Industry University, Doctor of  Philosophy, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0002-4591-8013

3Assistant, “Mechanical Engineering and Materials Science”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

ABSTRACT

The article considers important to study the issues of removal of oxide films from the surface of metals and solder materials and the increase of homogeneity of the space in the process of soldering under the active gas and vacuum conditions. Theoretical and experimental studies have shown that the process of self-fluxing is mainly associated with the reduction of adsorption forces, dispersion of oxide films and solubility in solder.

Keywords: steel unit, copper-phosphorus alloy, active gas-vacuum, melting temperature, cracking, wetting, oxide film, self-fluxing, microstructure, hardening.

SIMULATION OF KINETIC CURVES OF THERMO-OXIDATIVE DESTRUCTION OF PROLIMERS USING DIFFERENTIAL EQUATIONS OF FRACTIONAL ORDER

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Published: Monday, 07 June 2021 19:28
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Volume 7 (3), June 2021, Pages 53-63

1Oleq Dyshin, 2Ibrahim Habibov, 3Camaladdin Aslanov,

4Sevda Aghammadova, 5Irada Hasanzada

1 Senior Researcher, Research Institute "Geotechnological Problems of Oil, Gas and Chemistry", Azerbaijan.

2Professor, “Engineer and Computer Graphics”, Azerbaijan State Oil and Industry University, Doctor of technical sciences, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0003-3393-7812

3,4,5Dosent, Azerbaijan State Oil and Industry University, Candidate of technical sciences, Azerbaijan.

ABSTRACT

In the paper it is proposed to consider fractal kinetics equations for process of thermo-oxidative destruction of melt polymers in the form of differential equations of fractional order, equaling to fraction of reactant groups of polymer, which are not subjected to destruction, with order of reaction n > 1. Small νd characterize the autoslowed-down type of reaction, and at big νd <1 - the autoaccelerated thermooxidation type with an decreasing speed of oxidation reaction, respectively much more smaller and close to an integer derivative on time of the first order.

Comparative analysis of calculation results with corresponding results obtained by differential equations of integer order and degree of their matching with experimental data is given.

Keywords: Fractal analysis, thermo-oxidative destruction, auto-slow and auto-accelerated type of thermal oxidation, differential equations of type and fractional orders.


 

NANOCOMPOSITE MATERIALS FOR CORROSION PROTECTION OF PIPELINES

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Published: Monday, 07 June 2021 19:24
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Volume 7 (3), June 2021, Pages 41-47

Konul Rustamova

Engineer, Research Institute "Geotechnological Problems oil, gas and chemistry", Azerbaijan.

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

ABSTRACT

 Polymer coating materials are used to protect inter-mine pipelines from corrosion. The presented article proposes new polymer-based nanocomposite materials for corrosion protection of pipelines.

Keywords: polymer-based coating material, nanofiller, swelling coefficient.

INVESTIGATION OF THE ELECTROMAGNETIC EFFECT ON THE PROCESS OF OIL DISPLACEMENT FROM BITUMINOUS SANDSTONE USING A FERROMAGNETIC FLUID

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Published: Monday, 07 June 2021 19:26
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Volume 7 (3), June 2021, Pages 48-52

Tarana Sadiqova

Assistant of the Department,  “Engineer and Computer Graphics”, Azerbaijan State Oil and Industry University,  Dissertant, Azerbaijan.  E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0002-5228-4039

 ABSTRACT

 In Azerbaijan, due to natural oil, there are large reserves of bituminous rocks. Absheron-Gobustan district has 11 bituminous sandstone deposits with reserves of 12,673,6600 tons [1-3]. The largest reserves are concentrated in the Balakhan part of the Kirmaki Mountains, the reserves of which amount to more than 50 million tons. For the purpose of extraction of oil from bituminous rocks different methods and methods are used.

The results of the study of electromagnetic effects on the process of displacement of oil from bituminous sand with the use of ferromagnetic liquid are given in this work.

Keywords: bituminous sands, oil extraction, ferromagnetic liquid.

IMPROVING THE STRENGTH CHARACTERISTICS OF PACKERS' SEALING ELEMENTS MADE OF POLYMER NANOCOMPOSITES

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Published: Monday, 07 June 2021 19:22
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Volume 7 (3), June 2021, Pages 35-40

Arzu Suleymanova 

Senior laboratory assistant, “Industrial machines” department,  dissertant, Azerbaijan State Oil and Industry University, Azerbaijan.  E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0002-9936-7608 

ABSTRACT

 On the basis of a micromechanical model of the tensile strength of a polymer composite, it is shown that, in contrast to the case of adhesion between two polymers, when there is a linear correlation between the thickness of the interfacial region and the level of interfacial adhesion, the strength of the interface in nanocomposites of the "polymer-high modulus filler" type decreases with growth. its thickness. The dependence of the tensile strength of polymer nano-composites on the properties of the material and the level of interfacial interaction has been established.

Keywords: strength model, interfacial adhesion, nanocomposite, seal material, packer.

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