Mechanics and Advanced Technologies最新文献

{"title":"Semi-analytical implicit direct time integration method for 1-D gas dynamic problem","authors":"Igor Orynyak, Iryna Kostyushko, Roman Mazuryk","doi":"10.20535/2521-1943.2023.7.1.271273","DOIUrl":"https://doi.org/10.20535/2521-1943.2023.7.1.271273","url":null,"abstract":"Sharp wave treatment for 1-D gas dynamic problem is still a chellenge for modern numerical methods. They often require too many space and time steps, produce spurious oscillation of solution, exhibit a strong numerical dissipation or divergence of results. This paper is further extension of authors’ idea of employment the analytical solution for space coordinate, where time step is a parameter which used in the space solution. Its peculiarity consists in development of additional procedure of linearization of dependence between the pressure and density. It is performed in premise that actual pressure for each space element is close to the basic pressure, attained at previous moment of time. The efficiency of method is tested on the very popular task of Sod, where two different ideal gases in a tube are separated by diaphragm, which is suddenly broken. The problem considered in Lagrangian coordinates formulation. The results obtained show the very good efficiency of method, which requires the essentially lesser time and space steps, leads to no spurious oscillation and give consistent and predictable results with respect to meshing. The accuracy of method is mostly controlled by time step, which should be larger than clearly stated theoretical lower limit. Other advantage of method is that it can calculate the process to any desired moment of time, and space meshing can be variable in time and space and can be easily adapted during the process of calculation.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135238784","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}

{"title":"Taking into account a location of aircraft’s center of mass during motion cuing","authors":"Volodymyr Kabanyachyi, Serhii Hrytsan, Serhii Yankovskyi","doi":"10.20535/2521-1943.2023.7.1.273332","DOIUrl":"https://doi.org/10.20535/2521-1943.2023.7.1.273332","url":null,"abstract":"Compared to other information sources, motion cues provide a pilot with anticipatory information about spatial position and movement of aircraft. For motion cueing a flight simulator cockpit is installed on a motion system, movement of which motion cueing. Therefore, motion system is one of the most important components of full flight simulators. The problem of effective use of constructive resources of six-degrees of freedom synergistic motion system has been solved. But the problem of improving the motion cueing remained unsolved, due to the fact that location of motion system center of rotation is significantly different from location of aircraf’s center of gravity, and motion cues differ from real, flight one. The study subject is motion cueing on flight simulators. The problem was solved on the basis of simplified operator for transformation of motion system movements along individual degrees of freedom into jack movements, cubic spline functions to describe the dependence of the centers of rotation along pitch and yaw, and optimization theory using the deformable polyhedron method. The formulated and solved problem of taking into account of location of aircraft’s center of gravity during motion cueing along pitch and yaw increases an efficiency of using of constructive resource of a six-degrees of freedom synergistic motion system, a motion cueing fidelity and training realism on flight simulator.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135240320","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}

{"title":"Ensuring accuracy of contour milling on CNC machines","authors":"Yury Petrakov, Yan Romanov","doi":"10.20535/2521-1943.2023.7.1.276162","DOIUrl":"https://doi.org/10.20535/2521-1943.2023.7.1.276162","url":null,"abstract":"Contour milling is characterized by quasi-stationary, which leads to the occurrence of a machining error caused by elastic deflections of the machining system. Moreover, such an error cannot be eliminated by sub-adjusting the control program \"for size\", since it not is constant and changes along the contour in a wide range. To ensure the accuracy of contour milling, a new method of combined control is proposed, which uses a posteriori information of machine verification measurements of the machined surface and a priori information of modeling the material removal process. In case of single manufacturing, the allowance on the last pass is divided into two parts, and after machining the first part, verifications are performed, then modeling and machining of the second half according to the corrected control program. In mass manufacturing, verifications are performed on the first part, and all subsequent ones are machined according to the adjusted control program. To obtain the necessary a posteriori information, the technology of machine verifications on CNC-machine with a three-coordinate probe according to standard control programs is proposed, and it is enough to perform two measurements or one, in the presence of surfaces inclined to the coordinate axes of the contour. A computer program was created, the core of which is a mathematical model of the process, which reproduces the structural diagram of the machining system closed behind two elastic deflections. The primary control file is loaded in G-codes with measurement data, and as a result of the process simulation, a new control file for the CNC-machine tool is formed, which eliminates the error from elastic deflections of machining system. Preliminary tests showed the possibility of increasing the accuracy of contour machining by more than 3 times.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135240321","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}

{"title":"Technology and mechanical properties of reinforced continuous fiber 3D-printed thermoplastic composite","authors":"Anton Karvatskii, Vladyslav Solovei","doi":"10.20535/2521-1943.2023.7.1.266177","DOIUrl":"https://doi.org/10.20535/2521-1943.2023.7.1.266177","url":null,"abstract":"Background. Additive technologies based on Fused Deposition Modeling (FDM) modeling methods attract a lot of attention from both industry and research groups, which is explained by low investment costs, ease of production, etc. If the processing parameters are correctly selected, products with mechanical properties close to products obtained by traditional technologies can be obtained. Objective. Practical implementation of the modernized technology for 3D printing of Polylactid Acid (PLA) samples reinforced with continuous Kevlar fiber using the FDM method and determination of their mechanical properties. Methods is based on experimental and theoretical studies of the limit of tensile strength and modulus of elasticity of the composite and includes testing of samples on the SHIMADZU AGS-X testing machine and solving the inverse problem. Results. Experimental samples of thermoplastic composite (PLA+Kevlar fiber Æ0.3 mm) were tested for tension. It was found that the tensile strength of the reinforced composite compared to the unreinforced one with a Kevlar volume fraction of about 12% increases by 2.38 times, and the modulus of elasticity increases by 1.45 times. With a confidence interval of 0.68, the error of determining the ultimate tensile strength is 3.5%, and the modulus of elasticity is 4.5%. A theoretical dependence was obtained for predicting the modulus of elasticity of thermoplastic composites in the range of changes in the degree of reinforcement up to 15%. Conclusions. The application of additive technologies based on FDM for 3D printing of thermoplastic composites with increased mechanical properties is substantiated.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135238785","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}

{"title":"Vacuum plasma erosion resistant 2D nanocomposite coating Avinit for compressor blades of gas turbine engines of aircraft engines","authors":"Oleksiy Sagalovych, Viktor Popov, Oleksandr Kononyhin, Vladislav Sagalovych, Stanislav Dudnik, Oleksandr Prokopenko","doi":"10.20535/2521-1943.2023.7.1.264788","DOIUrl":"https://doi.org/10.20535/2521-1943.2023.7.1.264788","url":null,"abstract":"The work is devoted to the search for new vacuum-plasma coatings with high hardness to increase the durability of the compressor blades of the GTE of aircraft engines Ti-Al-N-based vacuum-plasma coatings obtained by Avinit technologies, which ensure the application of hard, high-quality coatings with dramatically reduced micro-arc damage, were selected as candidates. Avinit multilayer coatings have higher functional characteristics than TiN (microhardness, crack resistance, temperature resistance, erosion and corrosion resistance) and may be promising for applying erosion-resistant coatings for compressor blades. Avinit technologies are technologically closest to the vacuum-plasma technologies used in industrial production for applying TiN protective coatings. New multi-layered 2D nanocomposite wear-resistant ion-plasma hard coatings Avinit (TiN-AlN)n have been developed. The created software products made it possible to reach a qualitatively new level in terms of further modification and improvement of the designs of Avinit functional coatings, stability of technologies and improvement of their quality control when applying such coatings for use in the production of compressor blades of gas turbine engines of aircraft engines. Special attention is paid to methods of preliminary ion-plasma treatment of surfaces before coating. Metallographic studies of the chemical and phase composition and structure of Avinit (TiN-AlN)n coatings have been carried out. The thickness of the coatings is 7-9 μm, the microhardness is 34-35 GPa (compared to the serially used TiN coating: 27.4 GPa). The use of three-stage ion-plasma treatment in Avinit technologies using a double vacuum-arc discharge followed by the application of strengthening coatings in a single technological cycle eliminates the formation of cracks and ensures the production of tightly bonded, high-quality coatings of a given composition with the maximally reduced share of the droplet component. The developed coatings (TiN-AlN)n were applied to experimental batches of working compressor blades of GTE aircraft engines for bench tests.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135238786","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}

{"title":"METHODS OF OBTAINING NON-ALCOHOLIC AND LOW-ALCOHOL BEER","authors":"Т.А. Байбатыров, А.Ж. Наурызбаева, Э.Б. Аскарбеков, Г.И. Байгазиева","doi":"10.55956/vpdk3258","DOIUrl":"https://doi.org/10.55956/vpdk3258","url":null,"abstract":"Алкогольсіз және төмен алкогольді сыра нарығы соңғы жылдары айтарлықтай өсті және\u0000 өсуді жалғастырады деп болжануда. Дегенмен, алкогольсіз және төмен алкогольді сыралардың\u0000 органолептикалық проблемалары бар және көптеген тұтынушылар тарапынан мойындалмайды.\u0000 Физикалық әдістер (деалкоголизация) дәмді нашарлатпау үшін әдеттегі күшті сырадан\u0000 этанолды кетірудің жұмсақ және таңдаулы әдістеріне бағытталған. Биологиялық әдістер\u0000 ашытуды тоқтату немесе баяулату арқылы этанолдың төмендеуіне назар аударады. Алкогольсіз\u0000 сыраны өндіру үшін сахаромицет емес ашытқыны қолдану бойынша зерттеулер соңғы жылдары\u0000 кеңейіп, тереңдей түсті, бұл сыраға жаңа дәм әкелуі мүмкін. Соңғы әдіс сонымен қатар оны\u0000 қолдану физикалық деалкоголизация әдістерінен айырмашылығы қосымша арнайы жабдықты қажет\u0000 етпейтіндігімен де қызықтырады. Алкогольсіз немесе төмен алкогольді сырадағы дәм\u0000 ақаулары этанол концентрациясын жою немесе төмендету процестерінде пайда болады.\u0000 Деалкоголизацияның барлық технологиялары ұшпа хош иісті қосылыстардың (жоғары спирттер,\u0000 эфирлер) айтарлықтай жоғалуына әкеледі. Көптеген авторлардың пікірінше, мембраналық сүзу\u0000 әдісін қолдану арқылы минималды шығындарға қол жеткізіледі. Мұнда алкогольсіз және төмен\u0000 алкогольді сыраны алудың әртүрлі тәсілдері және осы технологиялардан туындайтын сыраның\u0000 дәмдік-хош иісті ақаулары қарастырылған.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78921947","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}

{"title":"STUDY OF STRENGTH AND STRUCTURAL PROPERTIES OF NONWOVEN MATERIALS","authors":"Е.А. Кенжебаев, Б. Абзалбекулы, Г. Елдияр","doi":"10.55956/ypup6494","DOIUrl":"https://doi.org/10.55956/ypup6494","url":null,"abstract":"Мақалада беймата материалдарының беріктік және құрылымдық қасиеттері зерттелді.\u0000 Зерттеу H25S әмбебап үзу машинасы арқылы халықаралық ИСО 9073.3-1989 стандарды бойынша\u0000 жүргізілді. Зерттеу нәтижесінде бейматалардың беріктік және құрылымдық қасиеттері\u0000 анықталып, Exsel бағдарламасы арқылы статистикалық талдау жасалды. Бейматаларды аяқ киім\u0000 және құрылыс саласында жылытқыш материалдар ретінде қолданылу мүмкіндігі\u0000 негізделді.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"238 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77013731","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}

{"title":"Development of a national sour lactic dairy product based on non-boiling cereals\u0000 and its quality evaluation","authors":"A.B. Мynbayeva, U.M. Kelesbekova","doi":"10.55956/ltbn1156","DOIUrl":"https://doi.org/10.55956/ltbn1156","url":null,"abstract":"The article is devoted to the creation of a national lactic acid product\u0000 \"Flaky Cottage Cheese\" on the basis of three kinds of cereal flakes, which do\u0000 not require boiling. In the course of research the organoleptic and physico-chemical\u0000 parameters of the obtained product were determined. It was found that the addition of\u0000 uncooked three-grain flakes to the cottage cheese has a positive effect on the quality\u0000 of organoleptic indicators of the finished product, i.e. gives the product a\u0000 particularly pleasant taste and increases its nutritional value.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73582829","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}

{"title":"DEVELOPMENT AND EVALUATION OF THE RHEOLOGICAL CHARACTERISTICS OF GLUTEN-FREE SPONGE\u0000 ROLLS","authors":"Н.В. Иванникова, Л.Ж. Алашбаева","doi":"10.55956/uerb2878","DOIUrl":"https://doi.org/10.55956/uerb2878","url":null,"abstract":"В статье представлена технология получения безглютеновых мучных кондитерских\u0000 изделий – бисквитных рулетов из рисовой и гречневой муки в качестве специализированной\u0000 пищевой продукции в рационе питания для людей больных целиакией. Проведен ряд\u0000 исследований по определению качественных показателей, определены реологические\u0000 характеристики полуфабрикатов и готовой продукции.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83227437","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}

{"title":"INVESTIGATION OF PHYSICO-CHEMICAL PROCESSES OCCURRING DURING THE FIRING OF\u0000 HEAT-RESISTANT CONCRETE BASED ON SILICATE-SODIUM COMPOSITE BINDERS","authors":"Г.М. Баялиева, С.Т. Дуйсенбаева, Ж.Т. Иманбердиева","doi":"10.55956/iebt4719","DOIUrl":"https://doi.org/10.55956/iebt4719","url":null,"abstract":"Негізгі қаптағыш (футеровка) материалдары ретінде қымбат отқа төзімді заттар\u0000 қолданылады (шамот, корунд, кордиерит, жоғары глинозем және т.б.), олар жоғары отқа\u0000 төзімді болғанымен, жұмыс температурасы 1000-1300 0С дейінгі жылу қондырғыларында\u0000 тиімсіз қолданылады. Ең арзан байлам-бұл техногендік шикізат негізінде жасалған тұтқыр\u0000 заттар: кварциттер құм, домна және фосфор шлактары. Силикат-натрий композициялық\u0000 тұтқырғышындағы ыстыққа төзімді бетон күйдіру температурасы 1000-нан 1300 0С-қа дейінгі\u0000 керамикалық бұйымдарды, әкті және басқа материалдарды алу үшін пештердің пайдалану\u0000 жағдайларына төтеп бере алады. Минералды шикізатты кешенді пайдалану негізінен Ресейден\u0000 жеткізілетін қымбат, отқа төзімді өнімдерді үнемдеуге ғана емес, сонымен қатар аймақтағы\u0000 экологиялық жағдайды жақсартуға мүмкіндік береді.","PeriodicalId":32423,"journal":{"name":"Mechanics and Advanced Technologies","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83359940","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}