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ASYMPTOTIC ANALYSIS OF THE PROBLEM OF EQUILIBRIUM OF AN INHOMOGENEOUS BODY WITH HINGED RIGID INCLUSIONS OF VARIOUS WIDTHS 带有不同宽度铰链刚性夹杂物的非均质体平衡问题的渐近分析
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050206
N. P. Lazarev, V. A. Kovtunenko
{"title":"ASYMPTOTIC ANALYSIS OF THE PROBLEM OF EQUILIBRIUM OF AN INHOMOGENEOUS BODY WITH HINGED RIGID INCLUSIONS OF VARIOUS WIDTHS","authors":"N. P. Lazarev,&nbsp;V. A. Kovtunenko","doi":"10.1134/S0021894423050206","DOIUrl":"10.1134/S0021894423050206","url":null,"abstract":"<p>Two models are considered, which describe the equilibrium state of an inhomogeneous two-dimensional body with two connected rigid inclusions. The first model corresponds to an elastic body with two-dimensional rigid inclusions located in regions with a constant width (curvilinear rectangle and trapezoid). The second model involves thin inclusions described by curves. In both models, it is assumed that there is a crack described by the same curve on the interface between the elastic matrix and rigid inclusions. The crack boundaries are subjected to a one-sided condition of non-penetration. The dependence of the solutions of equilibrium problems on the width of two-dimensional inclusions is studied. It is shown that the solutions of equilibrium problems in the presence of two-dimensional inclusions in a strong topology are reduced to the solutions of problems for thin inclusions with the width parameter tending to zero.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"911 - 920"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FREE VIBRATION ANALYSIS OF A BIDIRECTIONAL FUNCTIONALLY GRADED CARBON NANOTUBE REINFORCED COMPOSITE BEAM 双向功能分级碳纳米管增强复合梁的自由振动分析
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050176
M. Pang, S. M. Zhou, B. L. Hu, Y. Q. Zhang
{"title":"FREE VIBRATION ANALYSIS OF A BIDIRECTIONAL FUNCTIONALLY GRADED CARBON NANOTUBE REINFORCED COMPOSITE BEAM","authors":"M. Pang,&nbsp;S. M. Zhou,&nbsp;B. L. Hu,&nbsp;Y. Q. Zhang","doi":"10.1134/S0021894423050176","DOIUrl":"10.1134/S0021894423050176","url":null,"abstract":"<p>Based on the Timoshenko beam theory, the vibration properties of a bidirectional functionally graded carbon nanotube reinforced composite beam are investigated. The governing equation of free vibration for the composite beam is derived, which considers the main influential factors, such as the gradient index and the distribution, aspect ratio, and volume ratio of carbon nanotubes. The differential quadrature method is used to solve the governing equation. The natural frequency of the composite beam is obtained. It is found that the natural frequency and vibration mode shapes of the beam are dependent upon the gradient index, nanotube distribution, and volume ratio of nanotubes. However, it should be pointed out that the nanotube distribution in the height direction and the volume ratio of nanotubes have very limited effects on the mode shapes of the composite beam.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"878 - 889"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
GAS AND GAS–DROPLET JET FLOWS INTO VACUUM 气体和气体-液滴喷射流进入真空
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050073
V. N. Yarygin, V. G. Prikhodko, I. V. Yarygin
{"title":"GAS AND GAS–DROPLET JET FLOWS INTO VACUUM","authors":"V. N. Yarygin,&nbsp;V. G. Prikhodko,&nbsp;I. V. Yarygin","doi":"10.1134/S0021894423050073","DOIUrl":"10.1134/S0021894423050073","url":null,"abstract":"<p>This paper presents a brief review of the experimental studies carried out at the Kutateladze Institute of Thermophysics of the Siberian Branch of the USSR Academy of Sciences to investigate the gas dynamics of low-density supersonic jets, including the design and construction of a vacuum gas-dynamic complex, the development of electron beam and laser methods diagnostics, studies of the influence of viscosity and nonequilibrium effects on the region of free supersonic expansion and the shock-wave structure of underexpanded jets. Problems are considered, and examples of using vacuum facilities to model the force, thermal, and contamination effects of full-scale orientation thruster jets on the structural elements of spacecraft and orbital stations are presented.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"784 - 792"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DESIGN AND EXPERIMENTAL ANALYSIS OF HEAT TRANSFER PERFORMANCE OF A TWO-PHASE CLOSED THERMOSYPHON SYSTEM 两相封闭式热虹吸系统传热性能的设计与实验分析
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050152
M. S. Elmosbahi, M. Hamdi, M. Hazami
{"title":"DESIGN AND EXPERIMENTAL ANALYSIS OF HEAT TRANSFER PERFORMANCE OF A TWO-PHASE CLOSED THERMOSYPHON SYSTEM","authors":"M. S. Elmosbahi,&nbsp;M. Hamdi,&nbsp;M. Hazami","doi":"10.1134/S0021894423050152","DOIUrl":"10.1134/S0021894423050152","url":null,"abstract":"<p>The aim of this research to assess the thermal performance of a locally developed two-phase closed thermosyphon system charged with methanol. The performance of the system is examined through experiments to determine the impact of changes in the electrical heat power, liquid charge, flow rate, inclination angle, and cooling water temperature on the output temperature. Temperatures at various points of the heat pipe, as well as cooling water, are recorded. Several fluid loadings are examined, ranging from 4 to 9 ml, which corresponds to the limits of the half full and overfilled evaporator. Different flow rates in the interval 0.2–0.7 kg/min, heat input in the interval 13.0–41.4 W, and cooling water temperature in the interval 15–35°C are considered. According to the findings, the ideal liquid fill ratio provides the best results in terms of the output temperature, and the heat transfer coefficient is between 64 and 71%. The impact of the adiabatic zone insulation on the temperature distribution along the heat pipe is illustrated.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"858 - 870"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
INFLUENCE OF CURRENT DENSITY ON THE STRUCTURE OF AMORPHOUS SILICON SUBOXIDE THIN FILMS UNDER ELECTRON-BEAM ANNEALING 电子束退火条件下电流密度对非晶硅亚氧化物薄膜结构的影响
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050061
E. A. Baranov, V. A. Nepomnyashchikh, V. O. Konstantinov, V. G. Shchukin, I. E. Merkulova, A. O. Zamchiy, N. A. Lunev, V. A. Volodin, A. A. Shapovalova
{"title":"INFLUENCE OF CURRENT DENSITY ON THE STRUCTURE OF AMORPHOUS SILICON SUBOXIDE THIN FILMS UNDER ELECTRON-BEAM ANNEALING","authors":"E. A. Baranov,&nbsp;V. A. Nepomnyashchikh,&nbsp;V. O. Konstantinov,&nbsp;V. G. Shchukin,&nbsp;I. E. Merkulova,&nbsp;A. O. Zamchiy,&nbsp;N. A. Lunev,&nbsp;V. A. Volodin,&nbsp;A. A. Shapovalova","doi":"10.1134/S0021894423050061","DOIUrl":"10.1134/S0021894423050061","url":null,"abstract":"<p>Electron-beam annealing of an amorphous silicon suboxide thin film with a stoichiometric coefficient of 0.5 was carried out in a vacuum chamber. The exposure time was 10 min at an accelerating electron-beam voltage of 1000 V and a current strength of 75 mA. Using probe measurements and calculations, the current density distribution over the electron-beam cross section was obtained assuming a normal distribution. The current density on the beam axis was 0.8 mA/mm<sup>2</sup>. The electron-beam annealing of the amorphous silicon suboxide thin film led to the formation of crystalline silicon nanoparticles with a size of <span>((4.1pm 0.1))</span> nm. The crystallite sizes did not depend on the electron-beam current density, in contrast to the degree of crystallinity, which decreased from 40% on the beam axis to zero (amorphous structure) on the periphery. It is suggested that during the formation of nanocrystalline silicon, a liquid phase is formed.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"778 - 783"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139474958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
MEASUREMENT OF SILICON MELT TEMPERATURE DURING ELECTRON BEAM REFINING 在电子束精炼过程中测量硅熔体温度
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050048
V. G. Shchukin, V. O. Konstantinov
{"title":"MEASUREMENT OF SILICON MELT TEMPERATURE DURING ELECTRON BEAM REFINING","authors":"V. G. Shchukin,&nbsp;V. O. Konstantinov","doi":"10.1134/S0021894423050048","DOIUrl":"10.1134/S0021894423050048","url":null,"abstract":"<p>A method for measuring the temperature of the silicon melt during plasma-chemical electron-beam refining is proposed. The method is based on measuring the radiation intensity from the melt in the infrared range and comparing it with the temperature. It is established that changing the refining conditions, in particular, the electron beam current allows a controlled change in the temperature refined silicon from 1500 K to 2600 K.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"767 - 771"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139474975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NUMERICAL SIMULATION OF THE DEVELOPMENT OF PERTURBATIONS INDUCED BY A PERIODIC HEAT SOURCE IN A SUPERSONIC BOUNDARY LAYER 超音速边界层中周期性热源引起的扰动发展的数值模拟
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050140
A. I. Kutepova, D. V. Khotyanovsky, A. A. Sidorenko
{"title":"NUMERICAL SIMULATION OF THE DEVELOPMENT OF PERTURBATIONS INDUCED BY A PERIODIC HEAT SOURCE IN A SUPERSONIC BOUNDARY LAYER","authors":"A. I. Kutepova,&nbsp;D. V. Khotyanovsky,&nbsp;A. A. Sidorenko","doi":"10.1134/S0021894423050140","DOIUrl":"10.1134/S0021894423050140","url":null,"abstract":"<p>Direct numerical simulation of interaction of a laminar boundary layer with a shock wave at a Mach number of 1.45 is performed. The influence of a periodic thermal source on the nature of this interaction is described.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"853 - 857"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
UNSTEADY AND QUASI-STEADY MODES OF THE FLOW OVER AN INTAKE TESTED IN A HOTSHOT WIND TUNNEL 在热风隧道中测试的进气口上方气流的非稳态和准稳态模式
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050127
Yu. P. Gounko, I. V. Kavun
{"title":"UNSTEADY AND QUASI-STEADY MODES OF THE FLOW OVER AN INTAKE TESTED IN A HOTSHOT WIND TUNNEL","authors":"Yu. P. Gounko,&nbsp;I. V. Kavun","doi":"10.1134/S0021894423050127","DOIUrl":"10.1134/S0021894423050127","url":null,"abstract":"<p>Results of a numerical simulation of an unsteady flow in an axisymmetric intake with internal compression tested in a hotshot wind tunnel with a fixed-volume settling chamber are discussed. The present simulations reveal the main features of various modes: unsteady processes of wind tunnel and intake starting, quasi-steady flow over the started intake with a supersonic flow velocity in the intake duct, and subsequent ulterior transition to the flow with a detached bow shock wave in front of the air intake with a subsonic flow velocity in the duct. A previously unknown mode of the flow over the intake with oscillating motion of the bow shock wave is observed. It is shown that oscillations decay with time, and the bow shock wave position in the incoming flow becomes stabilized at a certain distance from the leading edge of the intake with the test flow in the wind tunnel being preserved.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"827 - 839"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FERROMAGNETIC-ENHANCED LOW-PRESSURE INDUCTIVE DISCHARGE FOR PLASMA PROCESSING 用于等离子体加工的铁磁增强型低压感应放电
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S0021894423050036
M. V. Isupov, V. A. Pinaev
{"title":"FERROMAGNETIC-ENHANCED LOW-PRESSURE INDUCTIVE DISCHARGE FOR PLASMA PROCESSING","authors":"M. V. Isupov,&nbsp;V. A. Pinaev","doi":"10.1134/S0021894423050036","DOIUrl":"10.1134/S0021894423050036","url":null,"abstract":"<p>The generation of a low-frequency low-pressure inductive discharge with ferromagnetic enhancement of the magnetic coupling between the coil and the plasma is investigated. The main features and advantages of this plasma generation method for surface processing technologies are considered. New experimental data on the electrophysical and dynamic characteristics of ferromagnetic-enhanced low-pressure inductive discharge in argon with the addition of oxygen are presented. It is shown that the radial distribution of plasma parameters in a gas-discharge chamber can be controlled using distributed discharge generation. Significant fluctuations in the electron temperature during the discharge electric field period are found, and the mechanism of their occurrence is analyzed.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"757 - 766"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140889063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
STRUCTURING OF COPPER SURFACE BY GLOW DISCHARGE PLASMA 利用辉光放电等离子体对铜表面进行结构处理
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI: 10.1134/S002189442305005X
A. V. Petrova, A. I. Safonov
{"title":"STRUCTURING OF COPPER SURFACE BY GLOW DISCHARGE PLASMA","authors":"A. V. Petrova,&nbsp;A. I. Safonov","doi":"10.1134/S002189442305005X","DOIUrl":"10.1134/S002189442305005X","url":null,"abstract":"<p>This study demonstrates that the surface roughness of a copper sample can be controlled by treating it with glow discharge plasma. It is established that the main process affecting the morphology and composition of the surface is oxidation. Treatment causes the formation of various copper oxide nano- and microstructures on the surface of a copper sample. It is shown that, in the parameter range studied, the working gas pressure has a more significant effect on the formation of various structures than the glow discharge current density. As a result of the treatment, various stages of the surface oxidation are observed, caused by differences in the surface temperature.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 5","pages":"772 - 777"},"PeriodicalIF":0.5,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139475010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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