Кафедра "Теорія і системи автоматизованого проектування механізмів і машин"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/1705

Офіційний сайт кафедри http://web.kpi.kharkov.ua/tmm-sapr

Від 2005 року кафедра має назву "Теорія і системи автоматизованого проектування механізмів і машин”, попередня назва – кафедра "Теорія механізмів, машин і роботів" (від 1991), первісна назва – кафедра "Теорія механізмів і машин" (від 1920).

Кафедра "Теорія механізмів і машин" створена у 1920 році після злиття Жіночого політехнічного інституту з Харківським технологічним. Першим завідувачем кафедри став професор Яків Лазарович Геронімус, який суттєво вплинув на розвиток наукової школи з теорії механізмів і машин.

Кафедра входить до складу Навчально-наукового інституту механічної інженерії і транспорту Національного технічного університету "Харківський політехнічний інститут".

У складі науково-педагогічного колективу кафедри працюють: 1 доктор технічних наук, 7 кандидатів технічних наук; 1 співробітник має звання професора, 5 – доцента.

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Constitutive and numerical modeling of chemical and mechanical phenomena in solid oxide fuel cells and oxygen permeable membranes
(НТУ "ХПІ", 2007) Zolochevsky, A.; Kühhorn, A.
A relation between diffusion of the oxygen ions, chemical expansion in electrochemical ceramics, and chemically induced stress evolution in the cathode over time for the Single Chamber Solid Oxide Fuel Cell based on the miniaturisation concept using thick films produced by screen-printing method has been established. The proposed model has been used to calculate the time dependent stress distribution in the cathode as a function of the material parameters, geometrical parameters of the cathode, and concentration of the oxygen ions under steady state operating conditions of the Single Chamber Solid Oxide Fuel Cell.
Сhemically induced stresses in the cathode of single chamber solid oxide fuel cell
(НТУ "ХПИ", 2007) Zolochevsky, A.; Tkachuk, N. N.; Viricelle, J.-P.; Pijolat, C.
A relation between diffusion of the oxygen ions, chemical expansion in electrochemical ceramics, and chemically induced stress evolution in the cathode over time for the Single Chamber Solid Oxide Fuel Cell based on the miniaturisation concept using thick films produced by screen-printing method has been established. The proposed model has been used to calculate the time dependent stress distribution in the cathode as a function of the material parameters, geometrical parameters of the cathode, and concentration of the oxygen ions under steady state operating conditions of the Single Chamber Solid Oxide Fuel Cell.
An integrated approach to assessing seismic simulation based on analysis of preseismic, coseismic, postseismic and interseismic creep, and creep damage evolution
(НТУ "ХПИ", 2007) Zolochevsky, A.; Thiagarajan, G.
In this paper, a comprehensive theoretical, numerical and computational investigation based on the analysis of the Parkfield earthquakes will be carried out with the main focus directed at the understanding on how physical and chemical transport phenomena, creep deformation with preseismic, coseismic, postseismic and interseismic periods including steady-state static creep, diffusional creep, cyclic creep and dynamic creep, large strains, tension/compression creep asymmetry, creep dilatancy, active creep damage state (degradation) and passive creep damage state (healing), cyclic variations of velocities in boundary conditions, and tectonic loading history affect fault sliding, seismic activity in the crust surrounding a fault including accelerated seismic release characterized by cumulative Benioff strain, spatiotemporal seismicity patterns, large earthquake cycle on the fault as well as future destructive events. Furthermore, focus is put on how the diffusion, preseismic, coseismic, postseismic and interseismic creep processes, large strains, creep damage evolution including degradation and healing, movement of the front of creep rupture, boundary conditions as well as tectonic loading history may be modeled inorder to understand the workings of the Parkfield earthquakes and to predict new destructive earthquakes within a much shorter time frame than currently possible.
Sodium penetration and chemically induced stresses in the hollow cylinder of Rapoport-Samoilenko apparatus – I. Constitutive modeling
(NTU "KhPI", 2007) Zolochevsky, A.; Goncharova, G.
In this paper, a comprehensive theoretical investigation has been carried out with the main focus directed at the understanding on how sodium penetration and chemical expansion in the cathode material during aluminum electrolysis affect the time dependent and chemically induced stress distribution in the hollow cylinder of the Rapoport-Samoilenko apparatus. Constitutive modeling of chemical and mechanical phenomena has been given, and the formulae of stress distribution in the cylinder of the apparatus have been obtained.
An integrated approach to the analysis of creep, chemical expansion, creep damage and lifetime reduction for solid oxide fuel cells
(NTU "KhPI", 2007) Zolochevsky, A.; Hyde, T. H.; Zhaoji, Hu
In this paper, a comprehensive theoretical and numerical investigation has been carried out with the main focus directed at the understanding on how electrochemical transport phenomena, diffusional creep and chemical expansion in electrochemical ceramics affect creep damage growth and lifetime reduction for Solid Oxide Fuel Cell systems. Furthermore, focus is put on how the electrochemical diffusion, creep process, chemical expansivity as well as the creep damage growth in ceramic substances may be controlled in order to reduce stack degradation below 0.1%/1,000 hours, optimize cell, stack design and operating conditions, and extend stack lifetime above 40,000 hours for stationary applications and above 5,000 hours for transportation applications.
Constitutive and numerical modeling of chemical and mechanical phenomena in thermal barrier coatings for gas turbine blades of aircraft engines
(НТУ "ХПІ", 2010) Zolochevsky, A.; Sergienko, N.; Eremenko, S.; Kühhorn, A.
Виконано моделювання хімічних і механічних явищ, та розроблені узагальнені визначальні співвідношення, які можуть бути використано для розрахунків залежних від часу розподілень напружень та пошкоджуваності термоізоляції лопаток газових турбін авіаційних двигунів. Розроблені визначальні співвідношення впроваджено в формі структурних моделей для аналізу пошкоджуваності в часі термоізоляції лопаток газових турбін авіаційних двигунів, для аналізу міцності та тривалої міцності, для забезпечення безпечної роботи лопаток газових турбін авіаційних двигунів.
Damage accumulation in multilayer thin films on gamma titanium aluminides
(НТУ "ХПИ", 2014) Zolochevsky, A.; Parkhomenko, L.; Gnitko, V.; Kühhorn, A.; Kober, M.
The present paper involves comprehensive investigations towards an understanding on how aggressive environments, high service temperatures and long dwell times affect damage growth and lifetime reduction of different components of automotive combustion engines and aero-engines made out of gamma titanium aluminides with protective coatings. The outcome of this paper is related to the practical recommendations on how damage growth at high temperatures in multilayer thin films on gamma titanium aluminides under thermal cyclic conditions and multiaxial stress state may be controlled in order to reduce environmental degradation, optimize the protective coating and extend lifetime of a component for automotive, energy and aerospace applications.
Benchmark creep tests for thermal barrier coatings
(НТУ "ХПІ", 2013) Zolochevsky, A.; Sklepus, S.; Parkhomenko, L.; Gnitko, V.; Kühhorn, A.; Kober, M.; Leyens, C.
The topic of this paper involves a number of benchmark creep tests and reference solutions that give the possibility to verify the finite element analysis of stress redistribution in thermal barrier coatings related to commercial software packages. The numerical results have been compared in the benchmark tests with the results obtained by other methods and by other authors. The results of creep studies revealed the magnitudes of the local stresses that correlate with the residual stresses determined in the thermally grown oxide by the luminescence spectroscopy method. The creep properties of Ni-based superalloy substrate have strong influence on the stress state and subsequent failure of EB-PVD thermal barrier coatings. The obtained numerical results demonstrate that the future EB-PVD thermal barrier coatings should be developed simultaneously with the Ni-based superalloy substrate, because the effectiveness of coating is influenced by the composition and properties of the substrate.