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NUMERICAL CALCULATION OF THE HYDRODYNAMIC CHARACTERISTICS AND STRUCTURAL RESPONSE OF A SUPERSONIC TRUNCATED CONICAL PROJECTILE ENTERING WATER 超声速锥形截尾弹入水水动力特性及结构响应的数值计算
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S002189442303001X
M.-Y. Hu, S. Zhang, W.-X. Xia, Q.-C. Meng, W.-B. Yi
{"title":"NUMERICAL CALCULATION OF THE HYDRODYNAMIC CHARACTERISTICS AND STRUCTURAL RESPONSE OF A SUPERSONIC TRUNCATED CONICAL PROJECTILE ENTERING WATER","authors":"M.-Y. Hu,&nbsp;S. Zhang,&nbsp;W.-X. Xia,&nbsp;Q.-C. Meng,&nbsp;W.-B. Yi","doi":"10.1134/S002189442303001X","DOIUrl":"10.1134/S002189442303001X","url":null,"abstract":"<p>Based on the volume-of-fluid (VOF) multiphase model and the fluid-structure interaction (FSI) model, combined with the overset grid technology of the STAR-CCM+ software, a computational model for the oblique entry of truncated projectiles into water is established. The hydrodynamic characteristics and structural response characteristics of the projectile for various water entry angles are calculated and analyzed, and the evolution law of cavitation is determined. The numerical results are found to be in good agreement with experimental data.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"363 - 370"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4811621","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
SPATIAL EVOLUTION OF NEAR-BOTTOM COLD-WATER LENSES ON THE SHELF OF THE SEA OF JAPAN 日本海陆架近底冷水透镜体的空间演化
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S0021894423030112
A. V. Kosheleva, V. Yu. Liapidevskii, F. F. Khrapchenkov, I. O. Yaroshchuk
{"title":"SPATIAL EVOLUTION OF NEAR-BOTTOM COLD-WATER LENSES ON THE SHELF OF THE SEA OF JAPAN","authors":"A. V. Kosheleva,&nbsp;V. Yu. Liapidevskii,&nbsp;F. F. Khrapchenkov,&nbsp;I. O. Yaroshchuk","doi":"10.1134/S0021894423030112","DOIUrl":"10.1134/S0021894423030112","url":null,"abstract":"<p>The propagation and disintegration of nonlinear internal waves at the hydrophysical test site of the Pacific Oceanological Institute FEB RAS on the shelf of the Sea of Japan have been studied in the summer-autumn period for a number of years. The mechanisms of generation and propagation of nonlinear internal wave trains due to internal tide decay have been determined by continuous measurements of the vertical temperature and velocity distribution at depths of 20–60 m using bottom stations and by a regular study of the distributions of the main hydrodynamic characteristics along selected paths. In addition, other short-period sources of thermocline deformation have been detected that can be attributed to the propagation of bottom and surface vortex structures. The high spatiotemporal resolution of the temperature field in the neighborhood of bottom stations made it possible to reveal the fine structure of wave perturbations of various types. Multilayer shallow-water models for wave-train propagation have been developed and verified using the results of field and laboratory experiments.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"455 - 464"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4812780","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
INVERSE PROBLEM OF RIBBED PANEL FORMING 带肋板成形反问题
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S0021894423030215
S. V. Boyko, A. Yu. Larichkin
{"title":"INVERSE PROBLEM OF RIBBED PANEL FORMING","authors":"S. V. Boyko,&nbsp;A. Yu. Larichkin","doi":"10.1134/S0021894423030215","DOIUrl":"10.1134/S0021894423030215","url":null,"abstract":"<p>An algorithm for solving an inverse problem of forming a ribbed panel made of the AK4-1 alloy (analog of the AA2018 and Al-Cu<sub>2</sub>-Mg<sub>2</sub>-Ni<sub>1</sub> alloys) at a temperature of 200°C is proposed. The problem is reduced to solving a sequence of auxiliary direct problems on the stress-strain states of the elements of the panel structure. The structural elements are taken to be T-beams subjected to pure bending. The resultant moment for obtaining a desired shape is calculated by the Nelder–Mead simplex algorithm. Two approaches to obtaining goal-shaped parts are considered: deformation under the plastic flow condition and under the creep condition. The material models used in the study take into account the difference in the mechanical properties under tension and compression, as well as the presence of damage accumulated in the material. The calculations are performed with allowance for elastic springback of the part after load removal.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"546 - 554"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5114291","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
CAUCHY–POISSON PROBLEM OF WAVE PROPAGATION IN AN OCEAN WITH AN ELASTIC BOTTOM 弹性底海洋中波浪传播的柯西-泊松问题
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S0021894423030082
P. Maiti, P. Kundu, B. N. Mandal
{"title":"CAUCHY–POISSON PROBLEM OF WAVE PROPAGATION IN AN OCEAN WITH AN ELASTIC BOTTOM","authors":"P. Maiti,&nbsp;P. Kundu,&nbsp;B. N. Mandal","doi":"10.1134/S0021894423030082","DOIUrl":"10.1134/S0021894423030082","url":null,"abstract":"<p>The classical two-dimensional Cauchy–Poisson problem for an ocean modelled as an incompressible fluid with an elastic bottom is considered here. In accordance with the linear theory, the problem is formulated as an initial-value problem for the velocity potential in the fluid region, dilation potential, and rotational potential in the elastic medium below the fluid region. The Laplace transform in time and the Hankel transform in space are used in the mathematical analysis to obtain the form of the free surface depression and ocean bed vertical displacement component in terms of multiple infinite integrals. These integrals are evaluated asymptotically by the method of steepest descent. Variation of the ratio of the ocean bed amplitude to the free surface amplitude for different forms of the prescribed initial axially symmetric surface depression or the impulse for different values of elasticity parameters is investigated. The results obtained in the study are compared to the analytical solution of the problem in the case with a rigid bottom.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"423 - 436"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4812773","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
SILICON SURFACE PATTERNING BY GLOW DISCHARGE PLASMA 发光放电等离子体的硅表面图案化
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S0021894423030136
A. V. Petrova, A. L. Bogoslovtseva, S. V. Starinskiy, A. I. Safonov
{"title":"SILICON SURFACE PATTERNING BY GLOW DISCHARGE PLASMA","authors":"A. V. Petrova,&nbsp;A. L. Bogoslovtseva,&nbsp;S. V. Starinskiy,&nbsp;A. I. Safonov","doi":"10.1134/S0021894423030136","DOIUrl":"10.1134/S0021894423030136","url":null,"abstract":"<p>The possibility of changing the silicon surface morphology at certain glow discharge parameters is shown. It is established that oxidation is the main process influencing the surface morphology during glow discharge plasma treatment. As a result of processing in the investigated parameter range, various stages of the surface oxidation process are observed: the formation of a uniform oxide layer and the formation of nano- and microstructures of silicon oxide. It is shown that these processes lead to surface modification, which acquires stable hydrophilic and superhydrophilic properties.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"472 - 477"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4812775","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 AN EXTERNAL TANGENTIAL ELECTRIC FIELD ON THE DEVELOPMENT OF CAPILLARY TURBULENCE OF THE FREE SURFACE OF A NON-CONDUCTING FLUID 外切向电场对非导电流体自由表面毛细湍流发展的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S0021894423030124
N. M. Zubarev, E. A. Kochurin
{"title":"INFLUENCE OF AN EXTERNAL TANGENTIAL ELECTRIC FIELD ON THE DEVELOPMENT OF CAPILLARY TURBULENCE OF THE FREE SURFACE OF A NON-CONDUCTING FLUID","authors":"N. M. Zubarev,&nbsp;E. A. Kochurin","doi":"10.1134/S0021894423030124","DOIUrl":"10.1134/S0021894423030124","url":null,"abstract":"<p>This paper presents a three-dimensional direct numerical simulation of the chaotic dynamics of the free surface of a dielectric fluid placed in an external tangential electric field. The physical model includes the effects of energy pumping (external force), energy dissipation (viscosity), and surface tension. As the external electric field strength increases, a transition from the turbulence of dispersive capillary waves (at zero field) to anisotropic electrohydrodynamic wave turbulence is observed. In the strong field limit, where the fluid motion becomes highly anisotropic, a cascade of small-scale capillary waves is formed that propagates perpendicular to the external field direction. In this regime of motion, a new turbulence spectrum occurs that differs from the classical spectrum of capillary turbulence.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"465 - 471"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4817478","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
ELASTOPLASTIC FRACTURE OF A PLATE WITH TWO EDGE CRACKS 具有两个边缘裂纹的板的弹塑性断裂
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S0021894423030185
N. S. Astapov, V. D. Kurguzov
{"title":"ELASTOPLASTIC FRACTURE OF A PLATE WITH TWO EDGE CRACKS","authors":"N. S. Astapov,&nbsp;V. D. Kurguzov","doi":"10.1134/S0021894423030185","DOIUrl":"10.1134/S0021894423030185","url":null,"abstract":"<p>The strength of a rectangular plate with two opening-mode (mode I) edge cracks was studied using the Neuber–Novozhilov approach and a modified Leonov–Panasyuk–Dugdale model with a nonzero prefracture zone. A coupled discrete-integral fracture criterion is used since the stress field in the vicinity of the crack tip has a singularity. The ultimate strain fracture criterion is satisfied at the real crack tip, and the normal stress criterion is satisfied at the model crack tip. The constitutive equations of the analytical model are analyzed. Simple formulas for the fracture load are derived for quasi-brittle and quasi-ductile fracture. Plate fracture curves are plotted for a plane stressed state.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"523 - 530"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4811284","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
TRANSMISSION OF PULSED SIGNALS THROUGH A LAYER WITH VAPOR-GAS BUBBLES IN WATER 脉冲信号通过一层蒸汽-气体气泡在水中的传输
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S0021894423030069
V. Sh. Shagapov, Z. A. Bulatova, G. F. Shayakhmetov
{"title":"TRANSMISSION OF PULSED SIGNALS THROUGH A LAYER WITH VAPOR-GAS BUBBLES IN WATER","authors":"V. Sh. Shagapov,&nbsp;Z. A. Bulatova,&nbsp;G. F. Shayakhmetov","doi":"10.1134/S0021894423030069","DOIUrl":"10.1134/S0021894423030069","url":null,"abstract":"<p>This paper describes a study of the dynamics of a wave signal passing through gas-vapor bubble screensin a liquid with account for heat and mass transfer at an interface in an acoustic approximation. Numerical calculations and the fast Fourier transform method are used to obtain wave patterns for pressure pulses and describe the influence of various parameters of the state of the liquid with vapor-gas bubbles on reflection and transmission of acoustic waves through the screen is studied.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"402 - 412"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4811620","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 LASER SURFACE REMELTING OF 304 STAINLESS STEEL 304不锈钢激光表面重熔效果研究
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S002189442303015X
Yu. Chen, X. Li, J. Liu, Y. Zhang, X. Chen
{"title":"EFFECT OF LASER SURFACE REMELTING OF 304 STAINLESS STEEL","authors":"Yu. Chen,&nbsp;X. Li,&nbsp;J. Liu,&nbsp;Y. Zhang,&nbsp;X. Chen","doi":"10.1134/S002189442303015X","DOIUrl":"10.1134/S002189442303015X","url":null,"abstract":"<p>To study the effect of laser surface remelting (LSR) on the organization and properties of a 304 stainless steel surface layer, the microscopic morphology, hardness, roughness, adhesion, and corrosion resistance of the remelted layer (RL) are examined by changing the laser scanning speed (LSS). The experimental results show that the LSR technique hardens the 304 stainless steel substrate surface with a substrate hardness of 185 HV, and the maximum hardness after remelting is 248.9 HV. With an increase in the LSS, the surface roughness gradually decreases, while the bonding force first increases and then decreases, with the maximum bonding force being 26.1 N. At the LSS of 20 mm/s, the phase distribution in the RL is more uniform. The maximum self-corrosion potential of the RL reaches −0.718 V, and the self-corrosion current density is 3.872 A/cm<sup>2</sup>. The surface properties of 304 stainless steel are improved by using LSR.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"491 - 498"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4812785","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
HIGH-VELOCITY NONLINEAR DEFORMATION AND FRACTURE OF A DAMAGED MEDIUM WITH INITIAL STRESSES 具有初始应力的损伤介质的高速非线性变形与断裂
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-08-21 DOI: 10.1134/S0021894423030173
V. A. Petushkov
{"title":"HIGH-VELOCITY NONLINEAR DEFORMATION AND FRACTURE OF A DAMAGED MEDIUM WITH INITIAL STRESSES","authors":"V. A. Petushkov","doi":"10.1134/S0021894423030173","DOIUrl":"10.1134/S0021894423030173","url":null,"abstract":"<p>With account for the degradation of the properties of materials, the nonlinear processes of deformation and fracture in a preloaded three-dimensional solid with a sharp concentrator in the zone of a dissimilar joint under impact are analyzed. A generalized mathematical model of nonlinear interrelated deformation and fracture of damaged polycrystalline media subjected to time-varied thermomechanical effects is presented. The strong nonlinearity of the model is due to large (finite) strains and the strain-rate dependent behavior of media with a variable microstructure. With account for the anisotropic hardening of media and the Bauschinger effect, the corresponding nonlinear boundary value problems are formulated and their solutions are obtained using efficient numerical methods. The viscosity of the medium and the second-order gradients from the internal variables of the system are used to control the correctness of the problem statement. Experimental data are used to test the model. Modeling results are presented.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 3","pages":"510 - 522"},"PeriodicalIF":0.6,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4812839","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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