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Stability of a Composite Plate in a High-Enthalpy Gas Flow 复合板在高焓气体流中的稳定性
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700990
B. A. Antuf’ev, A. A. Orekhov, U. S. Tsareva
{"title":"Stability of a Composite Plate in a High-Enthalpy Gas Flow","authors":"B. A. Antuf’ev, A. A. Orekhov, U. S. Tsareva","doi":"10.3103/s1068798x24700990","DOIUrl":"https://doi.org/10.3103/s1068798x24700990","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The divergence of a thin elastic plate reinforced by stiff ribs (stringers) with cyclic symmetry is considered, with some approximations. The incoming air flow is assumed to be supersonic, and so the aerodynamic load is described by means of approximate piston theory, for a steady temperature field. In taking account of the composite structure, attention is paid to the configuration of the stiffening ribs; a contact formulation is adopted. The lower critical velocity of the incoming air flow is determined by the first approximation, and its dependence on the number of stiffening ribs is investigated. It is shown numerically that, with increase in the distance between the ribs, the critical rate of divergence approaches its value for a smooth plate.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Approach to Preventing External Overheating of High-Speed Aircraft 防止高速飞机外部过热的新方法
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700904
V. F. Formalev, S. A. Kolesnik, B. A. Garibyan, O. A. Pashkov, E. A. Pegachkova
{"title":"New Approach to Preventing External Overheating of High-Speed Aircraft","authors":"V. F. Formalev, S. A. Kolesnik, B. A. Garibyan, O. A. Pashkov, E. A. Pegachkova","doi":"10.3103/s1068798x24700904","DOIUrl":"https://doi.org/10.3103/s1068798x24700904","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>External overheating of high-speed aircraft may be prevented by means of composites with significant longitudinal anisotropy. (The longitudinal thermal conductivity is two orders of magnitude greater than the transverse thermal conductivity.) In this approach, the heat fluxes that result from aerodynamic heating are channeled within the anisotropic composites from the hottest region (the front critical point) to the tail of the truncated cone. As a result, the vicinity of the front critical point is cooled and the tail of the cone is heated, with considerable decrease in the associated heat fluxes.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stress-Strain Analysis of the Initial Material of Workpieces during Broadening Extrusion 拓宽挤压过程中工件初始材料的应力应变分析
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700813
P. A. Ermolenkov, A. S. Gusev, E. Yu. Remshev
{"title":"Stress-Strain Analysis of the Initial Material of Workpieces during Broadening Extrusion","authors":"P. A. Ermolenkov, A. S. Gusev, E. Yu. Remshev","doi":"10.3103/s1068798x24700813","DOIUrl":"https://doi.org/10.3103/s1068798x24700813","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The stress-strain state of the workpiece material during plastic deformation with broadening extrusion, which is used to improve the mechanical characteristics of materials in the form of rods and wires of blank production, is calculated analytically. The analysis has shown the technological feasibility of using broadening extrusion for wires made of different materials in order to increase their initial strength.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamics of Composite Cylindrical Panels with Honeycomb Filler after Internal Damage by Aircraft Engine Jet 带蜂窝填料的复合材料圆柱板在受到航空发动机喷气机内部损伤后的动力学特性
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700953
L. N. Rabinskiy, M. I. Martirosov, D. V. Dedova, A. V. Khomchenko
{"title":"Dynamics of Composite Cylindrical Panels with Honeycomb Filler after Internal Damage by Aircraft Engine Jet","authors":"L. N. Rabinskiy, M. I. Martirosov, D. V. Dedova, A. V. Khomchenko","doi":"10.3103/s1068798x24700953","DOIUrl":"https://doi.org/10.3103/s1068798x24700953","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The influence of defects (splitting) on the stress–strain state of a three-layer cylindrical panel under the action of an aircraft engine jet is studied numerically, by the finite-element method. Two versions of honeycomb filler are considered. The polymer’s sheathing consists of individual polymer composite layers. Results for panels with and without defects are compared.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 the Thermal Expansion of Carbon–Carbon Composites on Their Tribological Stability 碳碳复合材料的热膨胀对其摩擦稳定性的影响
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700771
I. Yu. Tsukanov, A. N. Lyubicheva, P. O. Bukovskiy
{"title":"Influence of the Thermal Expansion of Carbon–Carbon Composites on Their Tribological Stability","authors":"I. Yu. Tsukanov, A. N. Lyubicheva, P. O. Bukovskiy","doi":"10.3103/s1068798x24700771","DOIUrl":"https://doi.org/10.3103/s1068798x24700771","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The influence of the thermal expansion of carbon–carbon composite disks on their tribological stability in a frictional pair with an annular ceramic counterbody is studied theoretically and experimentally. The thermal characteristics of composites with fibrous and fabric structure are investigated. Experimental time dependences of the load in frictional heating are compared with a model corresponding to the mechanics of contact interaction. The relation between the rigidity of the interface and the temperature dependence of the thermal expansion coefficient is determined for various materials. In the initial stage, wear of the fabric composite is found to be nonuniform, with destruction of fabric layers and breakaway of structural components.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Considerations on the Study of the Mechanism of Delamination of a Steel Plate Reinforced with Carbon Nanotubes during the Pull-Out Test 对碳纳米管增强钢板在拉拔试验中分层机理研究的思考
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700928
G. I. Kriven’, E. S. Senina, D. S. Shavelkin
{"title":"Considerations on the Study of the Mechanism of Delamination of a Steel Plate Reinforced with Carbon Nanotubes during the Pull-Out Test","authors":"G. I. Kriven’, E. S. Senina, D. S. Shavelkin","doi":"10.3103/s1068798x24700928","DOIUrl":"https://doi.org/10.3103/s1068798x24700928","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The study investigates the process of delamination of a steel plate from the matrix during the pull-out test. Experimental results are obtained for two types of specimens—unreinforced and reinforced steel plates. The reinforced plate is coated with a thin layer of carbon nanotubes on one of its surfaces. The results of the experiment reveal that the load under which the reinforced plate delaminates from the matrix block is over 150% greater than that value for the unreinforced plate. The load-displacement curves demonstrate several characteristic phases preceding complete delamination—elastic strain phase, fracture phase, and friction sliding phase. Considerations on determining the interfacial strength, as well as effective properties of the reinforced plate and catastrophic delamination lengths, are presented.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Peeling of Polymer Coating from a Substrate: Analysis as a Binary Composite 聚合物涂层从基底剥离：二元复合材料分析
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700801
I. K. Arkhipov, S. I. Koryagin, V. I. Abramova
{"title":"Peeling of Polymer Coating from a Substrate: Analysis as a Binary Composite","authors":"I. K. Arkhipov, S. I. Koryagin, V. I. Abramova","doi":"10.3103/s1068798x24700801","DOIUrl":"https://doi.org/10.3103/s1068798x24700801","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The failure of the adhesive bond between a substrate and a polymer coating may be analyzed on the basis of findings in the failure mechanics of binary composites. On that basis, the relation between the destructive normal and tangential stresses and the linear concentration of the initial cracks is determined.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Methodology for Preliminary Assessment of Design Parameters of Suction Valve and Discharge Valve of a Piston Hybrid Energy Machine of Volumetric Action with Regenerative Heat Exchange 带再生热交换的容积式混合能源机吸入阀和排出阀设计参数的初步评估方法
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700758
V. E. Shcherba, E. V. Khodoreva, E. A. Dorofeev
{"title":"Methodology for Preliminary Assessment of Design Parameters of Suction Valve and Discharge Valve of a Piston Hybrid Energy Machine of Volumetric Action with Regenerative Heat Exchange","authors":"V. E. Shcherba, E. V. Khodoreva, E. A. Dorofeev","doi":"10.3103/s1068798x24700758","DOIUrl":"https://doi.org/10.3103/s1068798x24700758","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A method for preliminary assessment of the ratio of the flow sections areas of the suction and discharge valves in a piston hybrid energy machine with regenerative heat exchange when operating in pump and compressor modes at a constant angular velocity of the crankshaft is developed. It is shown that this ratio in pump mode should be twice as large as in compressor mode. The basic designs of self-acting valves in piston compressors and piston pumps are considered. Options for improving the designs of suction and discharge valves of piston hybrid energy volumetric machines with regenerative heat exchange are proposed.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental Researches on the Conductivity of Shock Impacts from Track Sled Supports to Products during Supersonic Tests 超音速试验中轨道雪橇支架对产品的冲击传导性实验研究
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700874
S. A. Astakhov, V. I. Biryukov
{"title":"Experimental Researches on the Conductivity of Shock Impacts from Track Sled Supports to Products during Supersonic Tests","authors":"S. A. Astakhov, V. I. Biryukov","doi":"10.3103/s1068798x24700874","DOIUrl":"https://doi.org/10.3103/s1068798x24700874","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The paper presents the methodology and results of experimental studies of vibrations and shock effects perceived by sliding supports during high-speed track tests of aircraft and their elements. Fire launches of the developed two-rail rocket carriage with vibration sensors spaced along the carriage elements from the sliding supports to the test object were carried out. The obtained results were processed by statistical analysis methods. Recommendations have been developed to reduce the amplitude of shocks and vibration loads acting on supports, the carriage itself and objects during high-speed tests.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research of the Impact of SLM Printing Parameters on Residual Deformation Levels in Aluminum Products SLM 印刷参数对铝制品残余变形水平的影响研究
Russian Engineering Research Pub Date : 2024-06-26 DOI: 10.3103/s1068798x24700965
A. V. Babaytsev, S. A. Shumskaya, A. V. Ripetskiy
{"title":"Research of the Impact of SLM Printing Parameters on Residual Deformation Levels in Aluminum Products","authors":"A. V. Babaytsev, S. A. Shumskaya, A. V. Ripetskiy","doi":"10.3103/s1068798x24700965","DOIUrl":"https://doi.org/10.3103/s1068798x24700965","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A significant limitation for application in industry of final products obtained by selective laser fusion technology is the formation of residual stresses due to temperature gradients during the formation of layers, which can lead to undesirable deformations of the product, cracks or tearing off of layers in the printing process. The main method of reducing residual stresses is tempering. However, this method does not always contribute to a complete reduction of residual strains. Another, less studied, method can be accomplished by varying the printing process parameters. This approach is particularly effective when residual stresses are accumulated locally due to the geometric shape of the printed object or due to the peculiarities of their arrangement in the 3D printer chamber. In this paper we study the influence of layer-by-layer synthesis parameters on the level of residual stresses in the products obtained by selective laser fusion technology. The probing hole method using digital image correlation was used to estimate the residual strain level. Based on the test results, the residual stress level was evaluated depending on the printing mode.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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