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Problem of a Moving Edge Dislocation 移动边缘位错问题
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010134
V. M. Sadovskii, O. V. Sadovskaya
{"title":"Problem of a Moving Edge Dislocation","authors":"V. M. Sadovskii,&nbsp;O. V. Sadovskaya","doi":"10.1134/S0021894425010134","DOIUrl":"10.1134/S0021894425010134","url":null,"abstract":"<p>A moving edge dislocation in an infinite elastic medium is considered, simulating a stationary shear rupture in the Earth’s crust at a depth of seismic activity, which increases as quickly as transverse waves travel. Based on the expansion of the vector displacement field into the sum of the potential and solenoidal fields, an exact singular solution to the problem in a plane formulation is constructed in the form of convergent series. An approximate solution in the form of series segments is analyzed in the Matlab computer system using numerical differentiation and integration procedures. It is shown that the invariant <span>(J)</span>-integral, whose value is equal to the driving force of the dislocation (the energy spent on the movement of the dislocation by a unit distance), is independent on its velocity.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"139 - 148"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128586","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
Computational Modeling of Shock-Wave Loading due to the Detonation of a Cylindrical Explosive Charge in a Drill Pipe 圆柱形炸药在钻杆内爆轰冲击波载荷的计算模型
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010043
V. V. Dotsenko, E. Yu. Emel’yanova, A. G. Neskin, M. V. Nikul’shin, D. V. Petrov
{"title":"Computational Modeling of Shock-Wave Loading due to the Detonation of a Cylindrical Explosive Charge in a Drill Pipe","authors":"V. V. Dotsenko,&nbsp;E. Yu. Emel’yanova,&nbsp;A. G. Neskin,&nbsp;M. V. Nikul’shin,&nbsp;D. V. Petrov","doi":"10.1134/S0021894425010043","DOIUrl":"10.1134/S0021894425010043","url":null,"abstract":"<p>To develop a technology of drill pipe fracture and extraction from a well at a depth of more than 5000 m, we performed a numerical study of shock-wave loading of the inner surface of the pipe by the detonation of a special cylindrical charge. Two cases of detonation of the cylindrical explosive charge are considered: plane-front detonation and diverging spherical detonation. The computational model is a layered structure which consists of a cylindrical explosive charge in a copper case, a steel pipe, and drilling mud. The shock-wave impact on the drill pipe is calculated in a three-dimensional formulation using the multicomponent Eulerian approach. The calculations confirmed the possibility of drill pipe fracture in the region of the lock joint. It is shown that shock-wave loading by the plane-front detonation causes much more damage to the pipe than the impact by diverging spherical detonation. The minimum charge length sufficient for drill pipe fracture was determined by additional calculations.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"10 - 19"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128593","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
Spreading of a Layer on a Rotating Plane in an Aqueous Solution of a Polymer 聚合物水溶液中一层在旋转平面上的扩散
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010055
O. A. Frolovskaya
{"title":"Spreading of a Layer on a Rotating Plane in an Aqueous Solution of a Polymer","authors":"O. A. Frolovskaya","doi":"10.1134/S0021894425010055","DOIUrl":"10.1134/S0021894425010055","url":null,"abstract":"<p>A rotationally symmetric flow of an aqueous solution of a polymer in a layer bounded from below by a solid wall rotating with a specified angular velocity around the axis perpendicular to this plane and by a flat free surface from above is considered. The influence of the relaxation viscosity on the solution behavior and the dependence of the fluid layer thickness on time in various regimes of plane rotation are studied.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"108 - 115"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128588","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
Okstability of a Noncircular Composite Shell under Axial Compression and Nonlinear Deformation 非圆复合材料壳在轴向压缩和非线性变形下的稳定性
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010171
L. P. Zheleznov
{"title":"Okstability of a Noncircular Composite Shell under Axial Compression and Nonlinear Deformation","authors":"L. P. Zheleznov","doi":"10.1134/S0021894425010171","DOIUrl":"10.1134/S0021894425010171","url":null,"abstract":"<p>This paper describes a study of strength and stability of oval composite cylindrical shells under axial compression. The geometrically nonlinear problem for the shell is solved using the finite element method. The geometric dimensions of the shell are close to those of fuselages of modern passenger aircrafts. The other phenomena described in this paper are the effect of the cross-sectional out-of-roundness of the shell, the nonlinearity of the initial stress-strain state, and the stacking of monolayers by thickness on the critical loads and weight efficiency of composite and metal shells.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"131 - 138"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128614","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
Arrhenius Activation Energy and Zero Nanoparticles Flux Effects on Free Convection Flow of a Nanofluid Past an Isothermal Elliptical Cylinder with Internal Heat Generation 阿伦尼乌斯活化能和零纳米颗粒通量对纳米流体通过等温内热椭圆圆柱自由对流流动的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010067
K.-A. Yih, Ch.-J. Huang
{"title":"Arrhenius Activation Energy and Zero Nanoparticles Flux Effects on Free Convection Flow of a Nanofluid Past an Isothermal Elliptical Cylinder with Internal Heat Generation","authors":"K.-A. Yih,&nbsp;Ch.-J. Huang","doi":"10.1134/S0021894425010067","DOIUrl":"10.1134/S0021894425010067","url":null,"abstract":"<p>Arrhenius activation energy, zero nanoparticles flux, and internal heat generation effects on natural convection about an isothermal cylinder of elliptic cross section filled with a nanofluid are numerically analyzed in this paper. The nanofluid model involves Brownian motion and thermophoresis effects. The boundary condition of the zero nanoparticle flux causes the results to be more realistic and useful. By using a suitable coordinate transformation, the nonsimilar governing equations are achieved and then solved by Keller box method. Performing the comparisons with previously published work obtains the good agreement. The dimensionless temperature profiles and the Nusselt number results for the main parameters are presented in graphical and tabular forms. The physical aspects of the problem are discussed in details.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"20 - 31"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128616","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
Theory of Thermophoresis of a Large Evaporating Droplet in a Viscous Nonisothermal Binary Gaseous Medium 粘性非等温二元气体介质中大液滴蒸发热泳理论
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010092
N. V. Malai, P. V. Sokhan’, Yu. I. Shostak
{"title":"Theory of Thermophoresis of a Large Evaporating Droplet in a Viscous Nonisothermal Binary Gaseous Medium","authors":"N. V. Malai,&nbsp;P. V. Sokhan’,&nbsp;Yu. I. Shostak","doi":"10.1134/S0021894425010092","DOIUrl":"10.1134/S0021894425010092","url":null,"abstract":"<p>Thermophoretic motion of a spherical evaporating droplet in a viscous binary gas medium at arbitrary relative temperature differences in its vicinity is theoretically described in a quasistationary approximation at low Reynolds and Peclet numbers. A system of gas-dynamic equations is solved, including a velocity-linearized system of Navier–Stokes equations, as well as heat and mass transfer equations. The properties of a gaseous medium are described with account for the power-law dependence of the transfer (viscosity, diffusion, and thermal conductivity) and density coefficients on temperature. The resulting numerical estimates suggest that the dependences of the thermophoretic force and the velocity of the droplet on the average temperature of its surface are nonlinear.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"80 - 88"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128591","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 the Slot Orientation Angle on Stabilization of a Supersonic Boundary Layer 狭缝方向角对超声速边界层稳定的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010080
V. I. Lysenko, B. V. Smorodsky, A. D. Kosinov, A. A. Yatskikh
{"title":"Effect of the Slot Orientation Angle on Stabilization of a Supersonic Boundary Layer","authors":"V. I. Lysenko,&nbsp;B. V. Smorodsky,&nbsp;A. D. Kosinov,&nbsp;A. A. Yatskikh","doi":"10.1134/S0021894425010080","DOIUrl":"10.1134/S0021894425010080","url":null,"abstract":"<p>An experimental study is performed on the influence of surface slots (grooves) with a depth of 0.18 mm (the depth-based Reynolds number is <span>({{operatorname{Re} }_{h}} approx 1000)</span>) with orientation angles <span>(varphi = 0^circ )</span>, 30°, 45°, and 90° on the stability of a supersonic boundary layer on a flat plate. Experiments with natural disturbances at the free-stream Mach number <span>({text{M}} = 2)</span> are performed. It is found that the maximum rates of the spatial growth of disturbances decrease as the slot orientation angle decreases from <span>(varphi = 90^circ )</span> to zero. At <span>(varphi = 0^circ )</span> and 30°, they become smaller than the corresponding values for a smooth plate. The results obtained show that the instability of the first mode of the supersonic boundary layer, which determines the laminar-turbulent transition at <span>({text{M}} = 2)</span>, can be stabilized by small-depth slots with moderate angles of their orientation (<span>(0^circ leqslant varphi &lt; 40^circ )</span>).</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"45 - 50"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128589","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
Mechanical Characteristics of an Explosive in the Temperature Range 20–100°C 20-100℃范围内炸药的机械特性
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010031
A. P. Beketov, A. N. Efanov, M. V. Nikul’shin, O. S. Putilin
{"title":"Mechanical Characteristics of an Explosive in the Temperature Range 20–100°C","authors":"A. P. Beketov,&nbsp;A. N. Efanov,&nbsp;M. V. Nikul’shin,&nbsp;O. S. Putilin","doi":"10.1134/S0021894425010031","DOIUrl":"10.1134/S0021894425010031","url":null,"abstract":"<p>This paper presents the results of mechanical tests of specimens of the explosive under study. Stress–strain curves and Poisson’s ratio versus strain curves at a temperature of 20, 60, 80, 100°C are plotted. Temperature dependences of the mechanical characteristics of the explosive are obtained. The rigidity, strength, and deformability of the explosive are shown to decrease with increasing temperature.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"1 - 9"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128618","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
Simulating the Stress-Strain State and Optimizing the Contact Angle of a Spherical Shell Mold by a Support Filler 用支撑填料模拟球壳模具的应力-应变状态及优化接触角
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010109
V. I. Odinokov, E. A. Dmitriev, A. I. Evstigneev, A. N. Namokonov, D. V. Chernyshova, A. A. Evstigneeva
{"title":"Simulating the Stress-Strain State and Optimizing the Contact Angle of a Spherical Shell Mold by a Support Filler","authors":"V. I. Odinokov,&nbsp;E. A. Dmitriev,&nbsp;A. I. Evstigneev,&nbsp;A. N. Namokonov,&nbsp;D. V. Chernyshova,&nbsp;A. A. Evstigneeva","doi":"10.1134/S0021894425010109","DOIUrl":"10.1134/S0021894425010109","url":null,"abstract":"<p>This paper presents a theoretical study of the effect exerted on the stress-strain state in a shell mold by the contact angle between the support filler (SF) surface and the shell mold at which the spherical shell mold is not destroyed by the temperature stresses arising in it. We formulate the problem of optimization of the resistance of the spherical shell mold as a function of the contact angle of its support filler while the solidifying spherical casting within it cools down. The problem is solved using Navier equations, a heat equation, and a numerical method. The numerical scheme and the algorithm developed for solving the problem are given. It is shown that the crack resistance of the ceramic shell mold is determined by the normal stress value. The resulting resistance of the spherical ceramic shell mold is analyzed with account for the dependence of the shear modulus of the mold material on the support filler temperature.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"162 - 168"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128587","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
Transverse and Streamwise Vortices in Free Subsonic Axisymmetric Jets 自由亚音速轴对称射流中的横向和流向涡
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2025-09-24 DOI: 10.1134/S0021894425010110
V. G. Pimshtein
{"title":"Transverse and Streamwise Vortices in Free Subsonic Axisymmetric Jets","authors":"V. G. Pimshtein","doi":"10.1134/S0021894425010110","DOIUrl":"10.1134/S0021894425010110","url":null,"abstract":"<p>The formation of streamwise and transverse vortices in a subsonic air jet and in an air jet with the addition of helium due to the natural instability of the flow is shown using a high-resolution direct shadow method.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"66 1","pages":"61 - 64"},"PeriodicalIF":0.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128590","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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