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Annular Rod Torsion under Orthotropic Creep 正交各向异性蠕变作用下环空杆的扭转
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S002189442501002X
I. A. Banshchikova
{"title":"Annular Rod Torsion under Orthotropic Creep","authors":"I. A. Banshchikova","doi":"10.1134/S002189442501002X","DOIUrl":"10.1134/S002189442501002X","url":null,"abstract":"<p>Solutions to a problem of a solid circular rod made of orthotropic creep material and subjected to torsion by a constant torque are generalized to the case of an annular rod. Calculations are carried out using the Bhatnagar–Gupta method, the method based on the principle of minimum additional dissipation, and the finite element method. It is shown that the characteristic parameter method can be used to estimate a stress-strain state. The resulting analytical dependences of the twist angle rate on time at the steady-state stage of creep can be used to determine the shear parameters of the orthotropic Hill potential in torsion experiments or to refine them if these parameters were obtained via other approaches.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"149 - 161"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128592","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
Effect of T-Stresses on Kinking and Branching of the Crack Path t型应力对裂纹路径扭结和分支的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010079
V. D. Kurguzov
{"title":"Effect of T-Stresses on Kinking and Branching of the Crack Path","authors":"V. D. Kurguzov","doi":"10.1134/S0021894425010079","DOIUrl":"10.1134/S0021894425010079","url":null,"abstract":"<p>The direction of propagation of a straight-line plane crack in structurally inhomogeneous (grainy) materials under the combined effect of loading corresponding to fracture modes I and II is studied. The theoretical curve of the material strength or the Coulomb–Mohr curve type is assumed to be known. Based on the Neuber–Novozhilov force (integral) criterion relations are derived, which allow one to determine the angles of kinking (branching) of the crack path in the case of an arbitrary generalized stress state. Asymptotic presentations of the stress components in the vicinity of the crack tip take into account nonsingular terms (<span>(T)</span>-stresses). It is found that the crack can develop: 1) normal to the maximum stress direction if there are no shear stresses near the crack tip (Erdogan–Sih hypothesis) in the case of brittle fracture; 2) along the maximum shear direction if there are no normal stresses near the crack tip in the case of viscous fracture (in this case, a dislocation is emitted); 3) along a certain direction corresponding to a mixed stress state in the case of quasi-brittle or quasi-viscous fracture. The crack propagation direction depends on the ratio of the stress intensity factors for fracture modes I and II, sign of <span>(T)</span>-stresses, and shape of the theoretical curve of strength on the plane of the critical states.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"116 - 130"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128617","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
Nonlinear Problem of Filtration Convection of a Salt Solution Caused by the Osmotic Effect 渗透效应引起的盐溶液过滤对流非线性问题
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010122
M. M. Ramazanov, N. S. Bulgakova, S. R. Gadzhimagomedova, L. I. Lobkovskiy
{"title":"Nonlinear Problem of Filtration Convection of a Salt Solution Caused by the Osmotic Effect","authors":"M. M. Ramazanov,&nbsp;N. S. Bulgakova,&nbsp;S. R. Gadzhimagomedova,&nbsp;L. I. Lobkovskiy","doi":"10.1134/S0021894425010122","DOIUrl":"10.1134/S0021894425010122","url":null,"abstract":"<p>A mathematical model of solution filtration has been formulated taking into account the osmotic effect in porous media containing semipermeable inclusions. The nonlinear problem of osmotic convection has been solved for the model using the Galerkin method. The properties and characteristics of convection due to osmosis have been studied.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"32 - 44"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128622","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
Kelvin–Voigt Equations with a Discontinuous Density Profile 具有不连续密度曲线的Kelvin-Voigt方程
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010018
S. N. Antontsev, I. V. Kuznetsov
{"title":"Kelvin–Voigt Equations with a Discontinuous Density Profile","authors":"S. N. Antontsev,&nbsp;I. V. Kuznetsov","doi":"10.1134/S0021894425010018","DOIUrl":"10.1134/S0021894425010018","url":null,"abstract":"<p>Kelvin–Voigt equations for inhomogeneous fluids with a singular right side are studied. A singular term that approximates the Dirac delta function on an initially infinitely thin layer is introduced into the right side of a mass balance equation. This singular term is similar to the relaxation term used to describe nonequilibrium processes in hydrodynamics. In an extreme case, when a small parameter, namely, the characteristic size of the initial layer, tends to zero, the density and velocity at the initial time change abruptly.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"89 - 99"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128615","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
Problem of Upfloating of a Two-Dimendsional Cavity under the Influence of Gravity 重力作用下二维空腔的上浮问题
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010183
E. N. Zhuravleva, E. A. Karabut
{"title":"Problem of Upfloating of a Two-Dimendsional Cavity under the Influence of Gravity","authors":"E. N. Zhuravleva,&nbsp;E. A. Karabut","doi":"10.1134/S0021894425010183","DOIUrl":"10.1134/S0021894425010183","url":null,"abstract":"<p>A plane problem that describes the motion of a two-dimensional cavity located in a heavy ideal incompressible fluid is considered. Profiles of the free boundary are constructed by means of semi-analytical methods, and the motion of virtual singular points of the solution is studied.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"100 - 107"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128613","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
Turbulent Flow Structure in a Hemicylindrical Dimple on the Wall of a Flat Channel 平面沟道壁面半圆柱形凹槽内的湍流结构
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010158
V. I. Terekhov, I. A. Chokhar, N. Yan Lun
{"title":"Turbulent Flow Structure in a Hemicylindrical Dimple on the Wall of a Flat Channel","authors":"V. I. Terekhov,&nbsp;I. A. Chokhar,&nbsp;N. Yan Lun","doi":"10.1134/S0021894425010158","DOIUrl":"10.1134/S0021894425010158","url":null,"abstract":"<p>This paper presents the results of an experimental study of the flow structure in a hemicylindrical dimple located on one of the walls of a rectangular channel with a height <span>(H = 0.02)</span> m and a length-to-width ratio of 7.5. A dimple with a width <span>(D = 0.0158)</span> m and a length <span>(L{text{/}}D = 6.65)</span> calibers could be oriented at different angles to the longitudinal axis of the channel (<span>(varphi = 0)</span>–90°). In the experiments, the pressure in the median sections along and across the dimple, the velocity components, and their fluctuations in the longitudinal and transverse directions were measured. In the experiments, the Reynolds number based on the flow-rate-averaged velocity and the hydraulic diameter of the channel was constant and equal to <span>({text{R}}{{{text{e}}}_{{{text{ch}}}}} = 3.88 times {{10}^{4}})</span>. The pressure distributions on the dimple wall both in the transverse direction and along its length were found to depend significantly on its inclination angle to the channel axis. At the dimple inlet where the flow enters, a zone of strong rarefaction was formed. The length of this zone along the dimple did not exceed one caliber, and outside this zone, the pressure coefficient remained practically unchanged up to the dimple outlet, where there was a sharp increase in pressure due to stagnation. The greatest rarefaction in the transverse direction relative to the dimple occurred at an inclination angle <span>(varphi = 45^circ )</span>. The flow structure in different sections along the dimple length was studied. The maximum velocity of the circulation flow in the hemicylindrical dimple was observed at its inlet. Downstream along the dimple, the intensity of the vortex flow of the gas significantly decreased, and in the case of shallow dimples (<span>(Delta {text{/}}D = 0.22)</span>), the flow became unseparated.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"51 - 60"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128619","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
Implementation of the Spalart–Allmaras Turbulence Model in a Finite-Volume Gas-Dynamic Solver 有限体积气动力求解器中Spalart-Allmaras湍流模型的实现
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010146
G. V. Shoev, A. A. Shershnev, D. P. Polevshchikov, T. Yu. Shkredov, A. V. Kashkovsky
{"title":"Implementation of the Spalart–Allmaras Turbulence Model in a Finite-Volume Gas-Dynamic Solver","authors":"G. V. Shoev,&nbsp;A. A. Shershnev,&nbsp;D. P. Polevshchikov,&nbsp;T. Yu. Shkredov,&nbsp;A. V. Kashkovsky","doi":"10.1134/S0021894425010146","DOIUrl":"10.1134/S0021894425010146","url":null,"abstract":"<p>A numerical finite-volume method of solving averaged Navier–Stokes equations closed by a one-parameter Spalart–Allmaras turbulence model is discussed. The proposed method is implemented within the framework of the HyCFS numerical code and is verified through comparisons of the HyCFS numerical solutions with those predicted by the CFL3D and FUN3D numerical codes. Three verification cases are considered: flow past a flat plate, bump-in-channel flow, and coflowing jet. It is shown that the numerical solutions obtained are in good agreement with each other. The numerical data on the flow velocity in the mixing layer are compared with experimental results.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"65 - 79"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128620","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
Effects of the Grain Size and Temperature on the Tensile Behavior of Nanopolycrystalline Niobium 晶粒尺寸和温度对纳米多晶铌拉伸性能的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S002189442501016X
Yu. Yan, G. Lu, Yi. Lei
{"title":"Effects of the Grain Size and Temperature on the Tensile Behavior of Nanopolycrystalline Niobium","authors":"Yu. Yan,&nbsp;G. Lu,&nbsp;Yi. Lei","doi":"10.1134/S002189442501016X","DOIUrl":"10.1134/S002189442501016X","url":null,"abstract":"<p>Molecular dynamics (MD) simulations have been performed to study the uniaxial tensile responses of nanopolycrystalline niobium. Models with different grain sizes were established by using the Voronoi algorithm, and the effects of grain size and system temperature on the mechanical properties of polycrystalline niobium were investigated. The results indicate that grain size has a significant impact on deformation mechanism of nanopolycrystalline niobium. During the deformation process, the number of atoms at grain boundaries rises significantly, while dislocation density gradually decreases. Young’s modulus and yield stress reduced with reduction of grain size, which accords with inverse Hall–Patch formula. Specimens with smaller grain size have more grain boundaries and a larger proportion of chaotic atoms on grain boundaries, which leads to a decrease in mechanical properties. Young’s modulus and yield strength show an inverse relation with increase in system temperature, which is due to the higher temperature enlarge the number of disordered atoms at grain boundaries.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"169 - 177"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128621","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
EFFECT OF ULTRASONIC CAVITATION ON THE GAS–LIQUID INTERFACE UNDER FORCED AERATION 强制充气条件下超声空化对气液界面的影响
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060075
R.N. Golykh, J.-B. Carrat, V.N. Khmelev, I.A. Manyakhin, V.D. Minakov, D.V. Genne, A.R. Barsukov
{"title":"EFFECT OF ULTRASONIC CAVITATION ON THE GAS–LIQUID INTERFACE UNDER FORCED AERATION","authors":"R.N. Golykh,&nbsp;J.-B. Carrat,&nbsp;V.N. Khmelev,&nbsp;I.A. Manyakhin,&nbsp;V.D. Minakov,&nbsp;D.V. Genne,&nbsp;A.R. Barsukov","doi":"10.1134/S0021894424060075","DOIUrl":"10.1134/S0021894424060075","url":null,"abstract":"<p>A setup for experimental studies of the structure, shape, and size of the gas–liquid interface under ultrasonic exposure and forced aeration has been developed. It has been found that ultrasonic exposure leads to an about 1.5-fold increase in interfacial area during aeration. The ultrasound intensity has been shown to have an optimal value that provides a maximum increase in interfacial area per unit ultrasonic energy input.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1082 - 1095"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849034","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
CONTROL OF CRYSTALLIZATION OF NON-FERROUS METALS BY CHANGING THE PHASES OF THE SUPPLY CURRENTS OF A LINEAR INDUCTION STIRRER 通过改变线性感应搅拌器供电电流的相位来控制有色金属的结晶
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-04-18 DOI: 10.1134/S0021894424060038
G.L. Losev, A.D. Mamykin
{"title":"CONTROL OF CRYSTALLIZATION OF NON-FERROUS METALS BY CHANGING THE PHASES OF THE SUPPLY CURRENTS OF A LINEAR INDUCTION STIRRER","authors":"G.L. Losev,&nbsp;A.D. Mamykin","doi":"10.1134/S0021894424060038","DOIUrl":"10.1134/S0021894424060038","url":null,"abstract":"<p>Experiments were performed to study the crystallization of a gallium alloy in a vertical flat rectangular cuvette under external electromagnetic influence. The results of the study show that the propagation velocity and shape of the crystallization front can be effectively controlled by changing the power supply parameters of the electromagnetic stirrer. A mode characterized by intense stirring flow and significant inhomogeneity of the crystallization front was selected by varying the amplitude of electromagnetic forces. In this mode, changing the phase angles of the supply currents of the linear induction machine allows a fundamental change in the topology of hydrodynamic melt flows at a constant power supply of the stirrer. This, in turn, leads to a change in heat and mass transfer characteristics and hence the conditions in the interfacial region, making it possible to indirectly control the homogeneity of the crystallization front and, to a lesser extent, the phase transition rate. The contribution of convection to flow formation and its influence on the crystallization process have been studied. In particular, it has been shown that thermal convection can lead to the formation of additional vortex structures near heat exchangers, which prevents metal crystallization.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 6","pages":"1030 - 1042"},"PeriodicalIF":0.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848889","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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