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THERMOVISCOELASTIC MODEL OF SURFACE LAYER TREATMENT WITH VARIABLE VISCOSITY 变粘度表面层处理的热粘弹性模型
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-12-09 DOI: 10.1134/S002189442403009X
A. G. Knyazeva
{"title":"THERMOVISCOELASTIC MODEL OF SURFACE LAYER TREATMENT WITH VARIABLE VISCOSITY","authors":"A. G. Knyazeva","doi":"10.1134/S002189442403009X","DOIUrl":"10.1134/S002189442403009X","url":null,"abstract":"<p>The behavior of a material under laser surface treatment taking into account melting is described. A Maxwell model accounting for the changes in heat capacity and viscosity with changing temperature and material composition is presented. Based on this model, a model describing the change in the properties of a flat layer material subjected to a moving heat source is developed. An algorithm for the numerical solution of the formulated problem is presented. Examples are given showing the effect of heat loss, coupling, melting, chemical reactions, and their acceleration due to the stress work on the properties of the material.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 3","pages":"476 - 487"},"PeriodicalIF":0.5,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798395","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
PHYSICOMATHEMATICAL MODELING OF PROJECTILE PENETRATION INTO FLEXIBLE FABRIC TARGETS 弹丸侵彻柔性织物目标的物理数学建模
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-12-09 DOI: 10.1134/S0021894424030167
A. V. Petyukov, A. I. Bobrova, I. R. Grishin, D. A. Ivanov, M. Yu. Sotskii
{"title":"PHYSICOMATHEMATICAL MODELING OF PROJECTILE PENETRATION INTO FLEXIBLE FABRIC TARGETS","authors":"A. V. Petyukov,&nbsp;A. I. Bobrova,&nbsp;I. R. Grishin,&nbsp;D. A. Ivanov,&nbsp;M. Yu. Sotskii","doi":"10.1134/S0021894424030167","DOIUrl":"10.1134/S0021894424030167","url":null,"abstract":"<p>A simplified numerical method for simulating projectile penetration into fabric targets is proposed which takes into account the weavearchitecture, inter-yarn friction, projectile–fabric friction, and the transverse dimensions of the fabric. The necessary design parameters were selected from a comparison of experimental and calculated data. The proposed method was used to estimate the ballistic resistance of a composite armor reducing the after-penetration effect. The influence of the projectile shape on the ballistic resistance of fabric armor was investigated.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 3","pages":"543 - 553"},"PeriodicalIF":0.5,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798401","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
INCREASE IN APPROXIMATION ORDER OF CALCULATIONS OF WAVE PROCESSES IN A COMPOSITE SAMPLE WHEN USING AN UNSTRUCTURED COMPUTATIONAL GRID 当使用非结构化计算网格时，复合样品中波动过程计算的近似阶数增加
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-12-09 DOI: 10.1134/S0021894424030143
A. V. Vasyukov, I. B. Petrov
{"title":"INCREASE IN APPROXIMATION ORDER OF CALCULATIONS OF WAVE PROCESSES IN A COMPOSITE SAMPLE WHEN USING AN UNSTRUCTURED COMPUTATIONAL GRID","authors":"A. V. Vasyukov,&nbsp;I. B. Petrov","doi":"10.1134/S0021894424030143","DOIUrl":"10.1134/S0021894424030143","url":null,"abstract":"<p>A grid-characteristic numerical method based on tetrahedron grids is applied to simulate wave processes in a composite material under the action of a pulsed shock load. An approach is proposed to increase the approximation order of the method on an unstructured grid in the three-dimensional case. Computational results for load pulse propagation in a three-layer composite are presented.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 3","pages":"528 - 535"},"PeriodicalIF":0.5,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798391","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
REACTIVE HOT PRESSING OF B4C–CrB2 CERAMICS AND ITS MECHANICAL PROPERTIES B4C-CrB2 陶瓷的反应热压及其力学性能
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020068
D. V. Dik, T. S. Gudyma, A. A. Filippov, V. M. Fomin, Yu. L. Krutskii
{"title":"REACTIVE HOT PRESSING OF B4C–CrB2 CERAMICS AND ITS MECHANICAL PROPERTIES","authors":"D. V. Dik,&nbsp;T. S. Gudyma,&nbsp;A. A. Filippov,&nbsp;V. M. Fomin,&nbsp;Yu. L. Krutskii","doi":"10.1134/S0021894424020068","DOIUrl":"10.1134/S0021894424020068","url":null,"abstract":"<p>Ceramic composites based on B<sub>4</sub>C with a CrB<sub>2</sub> mole fraction of 0–30% were obtained by reactive hot pressing of a mixture of B<sub>4</sub>C, Cr<sub>2</sub>O<sub>3</sub>, and nanofibrous carbon at a uniaxial pressure of 17.5 MPa and a temperature of 2000 °C for 10 min. The possibility of boron carbide reduction of metal oxide during hot pressing was studied. During the synthesis of CrB<sub>2</sub>, the density of B<sub>4</sub>C was found to increase due to the formation of the CrB<sub>2</sub>–B<sub>4</sub>C eutectic liquid phase. The relative density of all B<sub>4</sub>C–CrB<sub>2</sub> composites obtained under these conditions exceeds 90%. Experimental dependences of the microhardness and elastic modulus of samples on the concentration of the CrB<sub>2</sub> plastic phase were obtained. The dependences of the elastic modulus of the heterogeneous material on the volume fraction of chromium diboride were determined taking into account porosity by sequentially using the Reuss and Voigt averaging schemes.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"249 - 256"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555235","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
EXPERIMENTAL INVESTIGATION OF THE MECHANICAL CHARACTERISTICS OF PHOTOLUMINESCENT COMPOSITE MATERIALS 光致发光复合材料力学特性的实验研究
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S002189442402007X
V. M. Fomin, T. A. Brusentseva, S. E. Lukin, A. N. Bagretsova
{"title":"EXPERIMENTAL INVESTIGATION OF THE MECHANICAL CHARACTERISTICS OF PHOTOLUMINESCENT COMPOSITE MATERIALS","authors":"V. M. Fomin,&nbsp;T. A. Brusentseva,&nbsp;S. E. Lukin,&nbsp;A. N. Bagretsova","doi":"10.1134/S002189442402007X","DOIUrl":"10.1134/S002189442402007X","url":null,"abstract":"<p>Crystal 85-5 epoxy resin modified with MHG-4E photoluminescent powder (average particle size 5–15 <span>(mu)</span>m) and FV-530D photoluminescent powders (average particle size 25 <span>(mu)</span>m) photoluminescent powders were studied by mechanical uniaxial tension and three-point bending tests. The dependence of the elastic modulus on filler concentration was obtained. The photoluminescent properties of the resulting composites were examined. The dependence of the afterglow intensity on filler content in the composite was determined.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"257 - 264"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906092","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
OPTIMIZATION OF THE TANGENTIAL JET BLOWING ON A TRANSONIC AIRFOIL FOR BUFFET CONTROL 跨声速翼型切向喷流的颤振控制优化
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020020
K. A. Abramova, V. G. Soudakov
{"title":"OPTIMIZATION OF THE TANGENTIAL JET BLOWING ON A TRANSONIC AIRFOIL FOR BUFFET CONTROL","authors":"K. A. Abramova,&nbsp;V. G. Soudakov","doi":"10.1134/S0021894424020020","DOIUrl":"10.1134/S0021894424020020","url":null,"abstract":"<p>Optimization of tangential jet blowing on the upper surface of a supercritical transonic airfoil under buffet conditions was carried out. Two-dimensional unsteady Reynolds-averaged Navier–Stokes equations were solved to simulate the flow past the airfoil. The Spalart–Allmaras turbulence model was used to close the equations. The location of the slot nozzle and the intensity of the jet blowing from it were varied. The optimal location for blowing with minimum jet intensity to suppress buffet was determined.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"202 - 209"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906095","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
SOLUTION TO A COUPLED PROBLEM OF THERMOMECHANICAL CONTACT OF FUEL ELEMENTS 燃料元件热机械接触耦合问题的解决方案
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020081
M. P. Galanin, A. S. Rodin
{"title":"SOLUTION TO A COUPLED PROBLEM OF THERMOMECHANICAL CONTACT OF FUEL ELEMENTS","authors":"M. P. Galanin,&nbsp;A. S. Rodin","doi":"10.1134/S0021894424020081","DOIUrl":"10.1134/S0021894424020081","url":null,"abstract":"<p>A problem of mathematical simulation of a fuel element region, including many fuel pellets and a cladding fragment, is considered in an axisymmetric formulation. It is assumed that the cladding is a thermoelastic-plastic body and that the pellet is a thermoelastic body with account for cracking of the material. Different variants of the domain decomposition method are used to numerically simulate the thermal and mechanical contact of pellets with each other and with the cladding. Calculation results are presented, in which the region containing ten pellets reaches a nominal power and the effect of pellet cracking on the thermomechanical state of the fuel element is estimated.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"265 - 273"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555236","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
STATE OF ART AND PROSPECTS OF INVESTIGATING THE POSSIBILITY OF TURBULENT BOUNDARY LAYER CONTROL BY AIR BLOWING ON A BODY OF REVOLUTION (REVIEW) 研究用空气对旋转体进行湍流边界层控制的可能性的技术现状和前景（综述）
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020019
V. I. Kornilov, A. N. Popkov
{"title":"STATE OF ART AND PROSPECTS OF INVESTIGATING THE POSSIBILITY OF TURBULENT BOUNDARY LAYER CONTROL BY AIR BLOWING ON A BODY OF REVOLUTION (REVIEW)","authors":"V. I. Kornilov,&nbsp;A. N. Popkov","doi":"10.1134/S0021894424020019","DOIUrl":"10.1134/S0021894424020019","url":null,"abstract":"<p>Investigations (mainly those performed by the authors) of air blowing through a perforated section on a body of revolution with a large aspect ratio in an axisymmetric incompressible flow are summarized. Result of numerical and experimental studies of the flow properties, efficiency of the turbulent boundary layer control and prospects of using it for a body of revolution at low subsonic velocities equivalent to the take-off and landing regimes for a modern subsonic cargo aircraft are analyzed.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"183 - 201"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540616","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
ASYMPTOTIC METHOD FOR DETERMINING ENERGY DISSIPATION AND DRAG COEFFICIENT IN A PERIODIC FLUID FLOW AROUND PLATES 确定绕板周期性流体流动中能量耗散和阻力系数的渐近方法
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020044
V. A. Buzhinskii
{"title":"ASYMPTOTIC METHOD FOR DETERMINING ENERGY DISSIPATION AND DRAG COEFFICIENT IN A PERIODIC FLUID FLOW AROUND PLATES","authors":"V. A. Buzhinskii","doi":"10.1134/S0021894424020044","DOIUrl":"10.1134/S0021894424020044","url":null,"abstract":"<p>A periodic flow of an incompressible fluid around plates at high Reynolds numbers and low Keulegan–Carpenter numbers is considered. Energy dissipation per oscillation period and drag coefficient of plates are determined. The two-dimensional problems under study are a problem of translational and angular oscillations of a flat plate and a plate shaped as a circular arc, a problem of translational oscillations of a circular cylinder with symmetrically located edges, a problem of angular oscillations of cruciform plates, and a problem of a periodic flow around an inclined edge on a flat wall. Also, a three-dimensional problem of translational and angular oscillations of a thin circular disk is considered. All the resulting dependences for energy dissipation and drag coefficient are presented in analytical form via velocity intensity factors, which characterize the velocity singularity at the sharp edges of the plates with a potential flow around an ideal fluid. Some of the resulting dependences are compared with the available numerical and experimental data.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"220 - 232"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906094","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
SURFACE CONSTANT-TEMPERATURE ANEMOMETER SENSORS USED TO ANALYZE PARTICLE IMAGE VELOCIMETRY DATA 表面恒温风速传感器用于分析粒子图像测速数据
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020093
O. I. Vishnyakov, P. A. Polivanov, D. A. Bountin
{"title":"SURFACE CONSTANT-TEMPERATURE ANEMOMETER SENSORS USED TO ANALYZE PARTICLE IMAGE VELOCIMETRY DATA","authors":"O. I. Vishnyakov,&nbsp;P. A. Polivanov,&nbsp;D. A. Bountin","doi":"10.1134/S0021894424020093","DOIUrl":"10.1134/S0021894424020093","url":null,"abstract":"<p>This paper describes a new method for performing the time-frequency analysis of particle image velocimetry data with account for surface constant-temperature anemometer sensor readings. This method is based on calculating correlation coefficients between particle image velocimetry data and constant-temperature anemometer data, previously filtered in a given frequency range. This approach makes it possible to obtain data on the unsteady characteristics of flows throughout the entire measurement range in a frequency range whose boundaries extend beyond the boundaries of the particle image velocimetry frequency range. The proposed method is applied to study nonstationary processes in a region where a shock wave interacts with a boundary layer at a Mach number M = 1.43.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"274 - 278"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906093","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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