scholarly journals EXPERIMENTAL STUDIES OF THE FATIGUE STRENGTH OF A500 CLASS REINFORCEMENT WITH VARIOUS TYPES OF PERIODIC PROFILE

2021 ◽  
pp. 100-107
Author(s):  
Vyacheslav TERIN ◽  
Dmitry KLIMOV ◽  
Alexander KVASNIKOV
Keyword(s):  
Experimental Data ◽  
Fatigue Strength ◽  
Experimental Studies ◽  
Deformation Characteristics ◽  
Factors Affecting ◽  
Research Results ◽  
Strength And Deformation ◽  
Main Factors ◽  
Periodic Profile

The article presents the results of studies of the fatigue strength of A500 class reinforcement by GOST 34028-2016 with various types of periodic profile. The data on the results of previously conducted experimental studies of the fatigue strength of various types of reinforcement are generalized and systematized, and the main factors affecting fatigue are established. Experimental data on strength and deformation characteristics under static and high-cycle loads of A500C class reinforcement with various types of periodic profile have been obtained. Based on the research results, proposals were made to improve the characteristics of the reinforcement and the periodic profile to increase its resistance to repeated cyclic loads and to amend the current regulatory documents. Вестник НИЦ «Строительство» • 3(30)2021 101 Ключевые слова: Арматура, периодический профиль арма- туры, предел выносливости, усталостная прочность

Strength and Deformation of Combined Beams with Side Reinforced Plates

2019 ◽  
Vol 968 ◽  
pp. 234-239
Author(s):  
Talyat Azizov ◽  
Oleksii Melnik ◽  
Oleksandr Myza
Keyword(s):  
Experimental Data ◽  
Reinforced Concrete ◽  
Experimental Studies ◽  
Calculated Data ◽  
Concrete Plate ◽  
Combined Action ◽  
Strength And Deformation ◽  
Concrete Plates ◽  
Good Agreement

The results of experimental studies of combined beams consisting of a stone part, reinforced with side reinforced concrete plates are given. Experimentally shown the viability of the proposed structures. The conditions for ensuring the combined action of a stone beam and a reinforced concrete plate are given. Cases are shown when one-sided plates can be used and when double-sided reinforced concrete plates can be used. A comparison of experimental data with the data calculated by the authors developed methods is given. A good agreement between theoretical and calculated data is shown.

scholarly journals JOINT WORK OF STEEL AND BASALT PLASTIC REINFORCEMENT WITH CONCRETE AS PART OF BEAM STRUCTURES

2021 ◽  
pp. 37-47
Author(s):  
I.A. Karpiuk ◽  
◽  
Ye.V. Klymenko ◽  
V.M. Karpiuk ◽  
A.S. A.S.Tselikova ◽  
...  
Keyword(s):  
Experimental Data ◽  
Crack Resistance ◽  
Graphical Analysis ◽  
Deformation Characteristics ◽  
Joint Work ◽  
Beam Structures ◽  
Strength And Deformation ◽  
Design Factors

Experimental data on strength, deflections and cracking in beams are presented. Beams are made with dimensions 2000x200x100mm with steel and basalt-plastic (BFRP) reinforcement. They have been tested for static and low-cycle reloading. The results of studies of the main parameters of the performance of research elements are presented in the form of the corresponding experimental-statistical dependences for the actions of operational and destructive loads with the same design factors. With the help of stochastic and graphical analysis, the influence of the type of reinforcement and design factors on the strength and deformation characteristics, as well as on the crack resistance of experimental samples - beams, is estimated.

Расчет передаточной характеристики анизотропного магниторезистивного преобразователя магнитного поля

2020 ◽  
Vol 13 (3-4) ◽  
pp. 230-238
Author(s):  
В.В. Амеличев ◽  
Д.В. Костюк ◽  
Д.А. Жуков ◽  
А.Б. Шевченко ◽  
С.И. Касаткин ◽  
...  
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Magnetization Vector ◽  
Factors Affecting ◽  
One Dimensional ◽  
Main Factors

Представлена разработанная теоретическая модель одномерной неоднородности (МОН) и описаны основные факторы, влияющие на распределение вектора намагниченности тонкого магниторезистивного элемента анизотропного магниторезистивного преобразователя (АМРП). Получены результаты расчета вольт-эрстедных характеристик АМРП с помощью МОН, которые согласуются с экспериментальными данными. The developed theoretical model of one-dimensional heterogeneity (MODH) is presented. Described are the main factors affecting distribution of a thin magnetoresistive element magnetization vector of an anisotropic magnetoresistive transducer (AMRT). The calculated results of AMRT volt-oersted characteristics obtained using MODH are consistent with the experimental data.

scholarly journals Determination of dynamic properties of the caterpillar drive of hydraulic reclamation machines and the method of articulated attachment of the working body of the trenchless pipelayer

2021 ◽  
Vol 47 (4) ◽  
pp. 122-131
Author(s):  
T. G. Gasanov ◽  
E. Z. Batmanov ◽  
M. R. Guseynov ◽  
M. N. Nazhmudinova
Keyword(s):  
Automatic System ◽  
Dynamic Properties ◽  
Experimental Studies ◽  
System Operation ◽  
Factors Affecting ◽  
Main Factors ◽  
Working Bodies ◽  
Executive Mechanism ◽  
Earthmoving Machines

Objective. The objective of the study is to determine the requirements for various devices of hydraulic reclamation machines, which are widely used in the construction of canals and drains, to maintain a given slope, as well as the calculation of the executive mechanism that serves to eliminate the oscillating movement of the working body relative to the line of the specified slope.Methods. A mathematical description of the vibrations of the working body for caterpillar hydraulic reclamation machines with mounted working bodies is given.Results. The article presents the results of research to identify the main factors affecting the oscillations of the working body of caterpillar reclamation machines. As a result of theoretical and experimental studies, it was found that when a caterpillar machine with a rigid undercarriage crosses single and multiple irregularities, the movement of the cutting edge of the rigidly mounted working body is graphically depicted by sinusoidal curves. The obtained dependencies allow conducting calculations of the automatic system of maintaining the specified slope and establish the area of stable modes of system operation. A geometric method for optimizing the hinge linkage of the working body of trenchless pipelayer is presented.Conclusion. The proposed methods of improving the performance of caterpillar hydraulic reclamation machines with mounted working bodies when moving on uneven ground surfaces can be used to create a wide class of mounted earthmoving machines, both with passive and active working bodies.

scholarly journals THE RESULTS OF THE STUDY OF THE INFLUENCE OF THE OPERATING CONDITIONS OF THE TURBOCHARGER ON ITS PERFORMANCE

2021 ◽  
pp. 70-74
Author(s):  
Aynur Galimov ◽  
Ilgiz Galiev ◽  
Bulat Ziganshin ◽  
Rail Khusainov ◽  
Al'bert Muhametshin
Keyword(s):  
Pressure Drop ◽  
Experimental Studies ◽  
The State ◽  
Operating Conditions ◽  
Lubrication System ◽  
Factors Affecting ◽  
The Matrix ◽  
Lubrication Mode ◽  
Bearing Assembly ◽  
Main Factors

The operability of the bearing assembly, which ensures the operation of the turbocharger at different speeds of its rotor, determines the reliability of the turbocharger as a whole. In this regard, the condition of the turbocharger bearing assembly determines the performance of the entire turbocharger. The purpose of the research is to justify the parameter that determines the performance of the turbocharger and a comparative assessment of changes in the state of turbochargers with a standard lubrication system and when using individual bearing assembly lubrication systems. The main factors affecting the state of the turbocharger bearing assembly, and hence the length of the rotor rotation by inertia after the engine stops, are considered to be: the increase in the clearance in the bearing assembly, the speed of rotation of the turbocharger rotor before the engine stops, and the time of pressure drop in the bearing assembly to zero after the engine stops. To obtain dependences describing the effect of the gap in the turbocharger bearing, the time of pressure drop in its lubrication system after the engine stops, and the change in the duration of rotation of the turbocharger rotor by inertia in dynamics, we conducted experimental studies. The experiment involved vehicles with a standard lubrication system and with an individual lubrication system for the turbocharger bearing assembly. The data was sample along the main diagonal of the matrix of experimental indicators. The dependences of the effect of the gap and the time of pressure drop in the bearing assembly on the duration of rotation of the rotor of the turbocharger by inertia after stopping the engine, at the speed of rotation of the rotor before stopping the engine 10000, 25000 and 40000 min-1 are obtained. A comparative analysis of this indicator is given for turbochargers with a standard and individual lubrication system of the bearing assembly, which shows that the duration of rotation of the rotor by inertia increases from 45 s (standard lubrication mode) to 90 s (with an individual lubrication system). This gives us reason to believe that the wear rate of the bearing will decrease by half during operation

Application of Low-Temperature Molten Dialkylimidazole Salts for Catalytic Alkylation and Hydrodechlorination

2018 ◽  
Vol 18 (4) ◽  
pp. 48-56
Author(s):  
A. S. Klimenko ◽  
S. A. Prikhod’ko ◽  
A. M. Beskopylnyi ◽  
I. V. Tertishnikov ◽  
N. Yu. Adonin
Keyword(s):  
Experimental Data ◽  
Heat Capacity ◽  
Aromatic Compounds ◽  
Scaling Up ◽  
Target Product ◽  
Factors Affecting ◽  
Multicomponent Condensation ◽  
Catalytic Hydrodechlorination ◽  
Different Temperatures ◽  
Main Factors

The paper deals with the possibility of preparing a mixture of 1,3-dialkylimidazole salts from commercially available reagents via multicomponent condensation. Main factors affecting the yield of the target product, as well as the obtained experimental data needed for scaling-up the process are discussed. It is shown that the prepared mixtures are close in some key properties (viscosity at different temperatures, heat capacity etc.) to the pure salts. The possibility of the application of the prepared salts as solvents for catalytic hydrodechlorination and catalyst components for alkylation of aromatic compounds is demonstrated.

scholarly journals ASSESSMENT OF BED JOINTS BEHAVIOR OF CALCIUM SILICATE BRICK MASONRY DURING EXECUTION

2016 ◽  
Vol 8 (4) ◽  
pp. 143-149 ◽  
Author(s):  
Tomas Šlivinskas ◽  
Bronius Jonaitis ◽  
Łukasz Drobiec
Keyword(s):  
Plastic Deformation ◽  
Compressive Strength ◽  
Composite Material ◽  
Calcium Silicate ◽  
Compressive Load ◽  
Mechanical Deformation ◽  
Deformation Characteristics ◽  
Factors Affecting ◽  
Mortar Strength ◽  
Strength And Deformation

This article examines masonry as the composite material. Factors affecting the mechanical deformation characteristics of masonry bed joints are reviewed. The strength and deformation characteristics of bed joints under the influence of changing mortar strength and variable compressive load are analysed Compressive strength, shrinkage and plastic deformation of masonry fragments and bed joints under variable compressive strength are also examined.

scholarly journals The Issues of Cryojet Technology Application for Rock Cutting

2018 ◽  
Vol 41 ◽  
pp. 03010
Author(s):  
Konstantin Golovin ◽  
Roman Kovalev ◽  
Andrey Kopylov
Keyword(s):  
High Speed ◽  
Cutting Tools ◽  
Experimental Studies ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Point Of View ◽  
Factors Affecting ◽  
Technology Application ◽  
High Cutting Speed ◽  
Main Factors

Water-jet technologies, based on the use of high-speed jets as cutting tools, are one of the promising directions of the destruction technologies for various materials. Jets’ capability to cut even very strong, anisotropic and composite materials, as well as their high cutting speed, that can be reached without workpiece reaction occurring on the tool, make them attractive from the point of view of their implementation as cutting tools. This paper outlines the methods of materials destruction by means of high-speed cryojet and discusses future areas of its application. The research reveals the main factors and criteria for evaluating the effectiveness of cryojet cutting. Experimental studies of the main factors affecting the cryojet cutting parameters were carried out using a bench unit. As a result of the experimental data analysis, we found the correspondences that can be used for calculating the cryojet cutting of various materials.

scholarly journals The tearing properties of textiles with steiner tree structure

2016 ◽  
Vol 20 (3) ◽  
pp. 823-826
Author(s):  
Ling-Ye Wu ◽  
Ping Wang ◽  
Yan Zhang ◽  
Hua Kong
Keyword(s):  
Steiner Tree ◽  
Geometrical Structure ◽  
Bulk Material ◽  
Experimental Studies ◽  
Structure Design ◽  
Tree Structure ◽  
Factors Affecting ◽  
Textile Materials ◽  
Main Factors ◽  
Geometrical Factors

Tearing properties of textiles has drawn much attention due to recent applications to bullet-proof or explosion-proof vests. However, the tearing process is very complex, which is influenced by bulk material and geometrical factors as well, and there is no a matured theory for the tearing process, which limits optimal design of the textiles. Despite many experimental studies, we still lack fully understanding of the tearing process. In this paper, tearing properties of textiles with Steiner tree structure are studied experimentally and theoretically in order to develop a reliable mathematical model. The theoretical analysis elucidates that cell size and the cell's material in a structure cell of Steiner tree are the two main factors affecting the tearing properties, which are verified experimentally. The theoretical prediction of tearing strength will be greatly benefit for geometrical structure design for textile materials in the future.

Theoretical and experimental studies of composite materials reinforced by carbon fabrics. Part 5: Simulation and experimental research of deformation of the carbon fabric structure

2020 ◽  
pp. 148-153
Author(s):  
B. M. Primachenko ◽  
K. O. Strokin
Keyword(s):  
Experimental Data ◽  
Experimental Research ◽  
Experimental Studies ◽  
Deformation Characteristics ◽  
Carbon Fabric ◽  
Uniformity Of Measurements ◽  
Fabric Structure ◽  
Good Coincidence ◽  
Methods Of Measurement

Results of simulation and experimental research allowed us to obtain values of deformation characteristics of carbon fabric structure. Experimental data were processed according to methods of measurement of state system for ensuring the uniformity of measurements. Theoretical and experimental data have good coincidence, confirming high quality of mechanic-analytical model for deformation of the carbon fabric structure.

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