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Modern Understanding of the Properties of a DC-Excited Gas Discharge Plasma as a Single Whole in Uniform Weak Longitudinal Magnetic Fields 均匀弱纵向磁场下直流激励气体放电等离子体整体特性的现代认识
IF 0.8 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-08-10 DOI: 10.1134/S0021894426700197
P. F. Kurbatov
{"title":"Modern Understanding of the Properties of a DC-Excited Gas Discharge Plasma as a Single Whole in Uniform Weak Longitudinal Magnetic Fields","authors":"P. F. Kurbatov","doi":"10.1134/S0021894426700197","DOIUrl":"10.1134/S0021894426700197","url":null,"abstract":"<p>Changes in the properties of a DC-excited gas discharge plasma in uniform weak longitudinal magnetic fields are analyzed. The state and behavior of this system in a weak magnetic field can be investigated using a reaction–diffusion equation that describes the ionization–recombination equilibrium in it, alongside modern concepts of ambipolar diffusion. It is shown that the presence of an external magnetic field decreases the transverse diffusion coefficient, disrupts the coherence of the emerging plasma states in the given systems, and induces noise or turbulence in diffusion and stratified regions, including contracted ones, while increasing the period of striations. Complete disruption of the spatiotemporal structure of the striation occurs when the magnetic field strength exceeds the critical value. A similar effect is also achieved by increasing the working gas pressure. The presented material allows for the generalization of all the aforementioned features of the behavior of the ionized gas as various manifestations of an integral plasma–field system.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 2","pages":"197 - 210"},"PeriodicalIF":0.8,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699671","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
Exact Solution of the Two-Dimensional Wiener–Hopf Integral Equation in Mixed Problems for Anisotropic Media 各向异性介质混合问题中二维Wiener-Hopf积分方程的精确解
IF 0.8 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-08-10 DOI: 10.1134/S0021894426700355
V. A. Babeshko, O. V. Evdokimova, O. M. Babeshko, V. S. Evdokimov
{"title":"Exact Solution of the Two-Dimensional Wiener–Hopf Integral Equation in Mixed Problems for Anisotropic Media","authors":"V. A. Babeshko,&nbsp;O. V. Evdokimova,&nbsp;O. M. Babeshko,&nbsp;V. S. Evdokimov","doi":"10.1134/S0021894426700355","DOIUrl":"10.1134/S0021894426700355","url":null,"abstract":"<p>An exact solution of the two-dimensional Wiener–Hopf integral equation is obtained for the first time and used to solve mixed problems in acute-angled wedge-shaped domains. Mixed problems for an arbitrary multilayer anisotropic composite are considered. The block element method is used in combination with topological and factorization approaches. The obtained solution has an integral representation that can be used in traditional software for integral evaluation when studying anisotropic composites. The solution contains singular sets in which it tends to infinity, which complicates direct numerical solution of such mixed problems. The exact solution of the two-dimensional Wiener–Hopf integral equation is equivalent to solving a mixed problem in a wedge-shaped domain with an angle of 90°. Using this result and topological methods allows the solution of these equations in arbitrary acute-angled wedge-shaped domains. A theory of contact problems for acute-angled wedge-shaped dies is constructed.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 2","pages":"356 - 362"},"PeriodicalIF":0.8,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699665","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
Failure Criterion for Bimaterials with Interface Cracks 双材料界面裂纹失效准则
IF 0.8 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-08-10 DOI: 10.1134/S0021894426700367
D. A. Kuznetsov, V. D. Kurguzov
{"title":"Failure Criterion for Bimaterials with Interface Cracks","authors":"D. A. Kuznetsov,&nbsp;V. D. Kurguzov","doi":"10.1134/S0021894426700367","DOIUrl":"10.1134/S0021894426700367","url":null,"abstract":"<p>The propagation of a straight crack at a bimaterial interface is investigated. A two-parameter (dual) elastoplastic failure criterion for mixed-mode cracks is proposed which includes a deformation criterion formulated at the tip of the initial crack and a force criterion formulated at the tip of a fictitious crack. The lengths of the initial and fictitious cracks differ by a value equal to the length of the prefracture zone. Since the interface crack is kinked, the kinkangle is determined using the maximum tangential stress criterion based on the stress field asymptotics near the crack tip, taking into account nonsingular terms. The prefracture zone is described using a modified Leonov–Panasyuk–Dugdale model of the cohesive zone of a sharp internal crack. The parameters included in the resulting analytical model are analyzed. The dimensionless geometric parameters of the structure are determined numerically using the finite element method. A system of two nonlinear equations is obtained for the critical length of the prefracture zone and the critical load under a complex stress state. The shape and dimensions of the prefracture zone near the crack tip in a nonlinear elastic material are determined using the von Mises criterion.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 2","pages":"363 - 372"},"PeriodicalIF":0.8,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699772","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
Aerosol Particle Size Control Using Ultrasound 利用超声波控制气溶胶粒径
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700112
O. B. Kudryashova, A. V. Shalunov, A. D. Abramov
{"title":"Aerosol Particle Size Control Using Ultrasound","authors":"O. B. Kudryashova,&nbsp;A. V. Shalunov,&nbsp;A. D. Abramov","doi":"10.1134/S0021894426700112","DOIUrl":"10.1134/S0021894426700112","url":null,"abstract":"<p>A method for controlling aerosol particle size by exposure to ultrasonic vibrations of varying intensity has been theoretically established. Ultrasonic exposure has been shown to induce either particle coagulation or fragmentation within gas-dispersed systems, depending on ultrasound frequency and intensity. A mathematical model for the coagulation and fragmentation of aerosol droplets in an ultrasonic field has been developed. The coagulation–fragmentation criterion <span>({{t}_{{{text{CF}}}}})</span> representing the ratio of the characteristic times of these processes is proposed for the first time. An expression is obtained for the critical particle diameter at which the characteristic times of the processes are equal (<span>({{t}_{{{text{CF}}}}} = 1)</span>).</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"122 - 132"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146897","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
Theoretical Study of Creep of Steel and a Nickel Alloy under Unsteady Thermomechanical Loading 非定常热力载荷下钢及镍合金蠕变的理论研究
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700021
V. M. Greshnov, I. V. Puchkova
{"title":"Theoretical Study of Creep of Steel and a Nickel Alloy under Unsteady Thermomechanical Loading","authors":"V. M. Greshnov,&nbsp;I. V. Puchkova","doi":"10.1134/S0021894426700021","DOIUrl":"10.1134/S0021894426700021","url":null,"abstract":"<p>A kinetic physicomathematical theory of metal creep taking into account thermally activated dislocation slip is used to describe the creep inf EI696 steel under uniaxial tension and EI826 nickel alloy under unsteady thermomechanical loading. The new results obtained in the work indicate the potential of using this theory in the design of aviation equipment.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"11 - 17"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146904","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
Wavy Viscous Flow in a Plane Channel: Stability and Heat Transfer from the Walls 平面通道中的波状粘性流动：稳定性和壁面传热
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700136
Yu. Ya. Trifonov
{"title":"Wavy Viscous Flow in a Plane Channel: Stability and Heat Transfer from the Walls","authors":"Yu. Ya. Trifonov","doi":"10.1134/S0021894426700136","DOIUrl":"10.1134/S0021894426700136","url":null,"abstract":"<p>Using the full Navier–Stokes equations, two branches of viscous fluid flow regimes were found in the form of steady-state traveling waves between two smooth surfaces. On the plane of parameters (wavelength, Reynolds number), the region of existence of the new solutions is determined and it is shown that the flow regimes corresponding to one of the branches are unstable. Stable regimes exist over a wide range of Reynolds numbers, starting from values significantly lower than the Reynolds number at which the linear stability of the basic steady-state solution is lost. The key wave characteristics of the new types of solutions are calculated. Implementing these solutions requires a pressure gradient significantly greater than that required to obtain the basic steady-state solution, resulting in more intense heat transfer from the walls.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"138 - 147"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146914","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
Initial Distribution of Velocity Fluctuations in a Hagen–Poiseuille Jet hagan - poiseuille射流中速度波动的初始分布
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700124
V. V. Lemanov, V. V. Lukashov, K. A. Sharov
{"title":"Initial Distribution of Velocity Fluctuations in a Hagen–Poiseuille Jet","authors":"V. V. Lemanov,&nbsp;V. V. Lukashov,&nbsp;K. A. Sharov","doi":"10.1134/S0021894426700124","DOIUrl":"10.1134/S0021894426700124","url":null,"abstract":"<p>The distributions of velocity pulsations in Hagen–Poiseuille flow for various Reynolds numbers and tube diameters are obtained in experiments. It is shown that the distribution of longitudinal velocity pulsations has a maximum at the axis and does not depend on the Reynolds number. As the Reynolds number increases, the turbulence intensity in the tube decreases and the root-mean-square value of pulsations increases. Velocity pulsations (below 2%) in Hagen–Poiseuille flow have practically no effect on jet flow from long tubes.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"133 - 137"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146908","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
Method for Constructing a Capillary Model of a Porous Medium Based on Tomographic Data for Core Samples 基于岩心样品层析数据构建多孔介质毛细管模型的方法
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700100
O. A. Simonov, Yu. Yu. Erina
{"title":"Method for Constructing a Capillary Model of a Porous Medium Based on Tomographic Data for Core Samples","authors":"O. A. Simonov,&nbsp;Yu. Yu. Erina","doi":"10.1134/S0021894426700100","DOIUrl":"10.1134/S0021894426700100","url":null,"abstract":"<p>An original method for constructing a model porous medium is proposed. This approach is based on the well-known and widely used capillary model, which accounts for pore size distribution. The porous medium model is formed by dividing the medium into thin layers perpendicular to the assumed flow direction with capillary segments whose characteristics are determined by standard core analysis methods. These layers are probabilistically connected to each other to form parallel capillaries with variable cross sections. The effective diameter of the capillaries is calculated under the assumption of inertialess flow, after which a pair of connected capillaries of different diameters is replaced by a new capillary with an effective diameter. After multiple repetition of this operation, the original porous medium is replaced by a bundle of parallel capillaries of the same diameter. The theoretical aspects are described, the underlying assumptions are validated, and the limitations on the application of the model are determined. The results of calculating the absolute permeability coefficient for two rock samples are presented and compared with the results of calculating the permeability coefficient using the classical capillary model. It is shown that the proposed model provides a better agreement between the calculation results and experimental data.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"111 - 121"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146888","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 Composition on the Hardness and Thermal Conductivity of Al–Fe66Cr10Nb5B19 Metallic Glass Sintered Composites 成分对Al-Fe66Cr10Nb5B19金属玻璃烧结复合材料硬度和导热性的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700033
D. V. Dudina, A. R. Nassyrbayev, A. A. Sivkov, M. A. Esikov, B. B. Bokhonov, V. I. Kvashnin, A. V. Ukhina, G. Y. Koga
{"title":"Influence of Composition on the Hardness and Thermal Conductivity of Al–Fe66Cr10Nb5B19 Metallic Glass Sintered Composites","authors":"D. V. Dudina,&nbsp;A. R. Nassyrbayev,&nbsp;A. A. Sivkov,&nbsp;M. A. Esikov,&nbsp;B. B. Bokhonov,&nbsp;V. I. Kvashnin,&nbsp;A. V. Ukhina,&nbsp;G. Y. Koga","doi":"10.1134/S0021894426700033","DOIUrl":"10.1134/S0021894426700033","url":null,"abstract":"<p>This paper presents a process for producing Al<b>–</b>Fe<sub>66</sub>Cr<sub>10</sub>Nb<sub>5</sub>B<sub>19</sub> metallic glass composites with low residual porosity at different concentrations of components. It was found that during sintering no interphase interactions between the components of the composite occurred. The hardness and thermal conductivity of Al–Fe<sub>66</sub>Cr<sub>10</sub>Nb<sub>5</sub>B<sub>19</sub> metallic glass composites were experimentally determined. The obtained data were compared with the values calculated according to the rule of mixtures. It is shown that the experimental values of thermal conductivity of composites with a volume fraction of metallic glass of 20 and 80% are close to the values calculated using models for parallel and series phase connection, respectively. The hardness values of these composites correspond to those calculated using the Reuss and Voigt models.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"18 - 24"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146912","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
Thermochemical Erosion of Carbon Composite Materials in Solid-Propellant Rig Tests 固体推进剂试验中碳复合材料的热化学腐蚀
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S002189442670001X
R. D. Berdov, L. I. Volkova, A. S. Golovatyuk
{"title":"Thermochemical Erosion of Carbon Composite Materials in Solid-Propellant Rig Tests","authors":"R. D. Berdov,&nbsp;L. I. Volkova,&nbsp;A. S. Golovatyuk","doi":"10.1134/S002189442670001X","DOIUrl":"10.1134/S002189442670001X","url":null,"abstract":"<p>The effect of a gas curtain resulting from the pyrolysis of the combustion chamber internal insulation in solid-propellant gas generators on the ablation of carbon inserts in the nozzle throat is investigated. Experimental data from two series of fire tests on test rigs are analyzed: those conducted by the authors and those described in the literature. The linear ablation rates obtained in the two series of tests are 2.5 and 6 times lower, respectively, than those calculated using standard methods for large-scale solid rocket motors. A mathematical model is proposed based on the coupled solution of integral momentum and energy relations for the boundary layer and the determination of the thermal state and ablation of materials. This model accounts for additional admixtures of “cold” gas chemically inert with respect to carbon into the flow of propellant combustion products. The model is validated by comparing calculated and experimental data, which differ by no more than 5%.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"1 - 10"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146913","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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