Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.04.55031.292-22
Д. В. Диваков, К. П. Ловецкий, А. Л. Севастьянов, А. А. Тютюнник
The numerical solution of the problem of guided propagation of polarized light in a smooth junction of a planar waveguide is considered. Within the framework of the model of adiabatic guided modes, the system of Maxwell equations is reduced to a system of four ordinary differential equations and two algebraic equations for six components of the electromagnetic field in the zeroth approximation and the same number of equations in the first approximation. The multilayer structure of waveguides makes it possible to reduce the problem to a homogeneous system of linear algebraic equations, whose nontrivial solvability condition yields the dispersion equation. Auxiliary eigenvalue problems for describing the adiabatic modes of the waveguide are solved.
{"title":"Адиабатические волноводные моды трехслойного интегрально оптического волновода","authors":"Д. В. Диваков, К. П. Ловецкий, А. Л. Севастьянов, А. А. Тютюнник","doi":"10.21883/jtf.2023.04.55031.292-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.04.55031.292-22","url":null,"abstract":"The numerical solution of the problem of guided propagation of polarized light in a smooth junction of a planar waveguide is considered. Within the framework of the model of adiabatic guided modes, the system of Maxwell equations is reduced to a system of four ordinary differential equations and two algebraic equations for six components of the electromagnetic field in the zeroth approximation and the same number of equations in the first approximation. The multilayer structure of waveguides makes it possible to reduce the problem to a homogeneous system of linear algebraic equations, whose nontrivial solvability condition yields the dispersion equation. Auxiliary eigenvalue problems for describing the adiabatic modes of the waveguide are solved.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90679518","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}
Pub Date : 2023-01-01DOI: 10.21883/tp.2023.05.56073.258-22
None Ignatjev V.K.
In the Markov relaxation and locally quasi-equilibrium distribution approximation, analogues of Onzager's relations for the response functions of the spin current in the nonlinear by intense mechanical and thermodynamic effects regime were obtained by the Kubo method. Keywords: locally quasi-equilibrium distribution, spin Hamiltonian, spin current, nonlinearity, reciprocity, streintronics, spin caloritronics, Peltier spin effect, Zeebeck spin effect.
{"title":"Reciprocity relations for mechanically induced spin currents in metals in a nonlinear regime","authors":"None Ignatjev V.K.","doi":"10.21883/tp.2023.05.56073.258-22","DOIUrl":"https://doi.org/10.21883/tp.2023.05.56073.258-22","url":null,"abstract":"In the Markov relaxation and locally quasi-equilibrium distribution approximation, analogues of Onzager's relations for the response functions of the spin current in the nonlinear by intense mechanical and thermodynamic effects regime were obtained by the Kubo method. Keywords: locally quasi-equilibrium distribution, spin Hamiltonian, spin current, nonlinearity, reciprocity, streintronics, spin caloritronics, Peltier spin effect, Zeebeck spin effect.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135988771","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}
Pub Date : 2023-01-01DOI: 10.21883/tp.2023.05.56074.12-23
None Babenko P. Yu., None Mikhailov V. S., None Shergin A. P., None Zinoviev A. N.
The results of modeling the sputtering coefficients of polycrystalline beryllium by hydrogen isotopes in the range of collision energies of 8 eV-100 keV and their dependences on the angle of incidence of the beam on the surface are presented. This data is necessary for estimating the sputtering of the first wall in the ITER tokamak made from beryllium. A strong surface shape influence on obtained results is shown. The limiting cases of a flat potential barrier (smooth surface) and a spherical potential barrier (a surface consisting of spikes) are considered. The effect of collision cascades on the sputtering coefficient has been established. The dependences of the average depth of sputtered particle formation on the bombarding particles energy are obtained for various angles of beam incidence on the target. The energy spectra and angular dependences of the ejection of sputtered particles are calculated for different energies of bombarding beam atoms. It is shown that the presence of an attractive well in the potential of an incident particle surface changes the sputtering coefficient dependence on incidence angle at small glancing angles. Keywords: Sputtering coefficients, energy and angular distributions of sputtered particles, interatomic potential, hydrogen isotopes, beryllium.
{"title":"Simulation of polycrystalline beryllium sputtering by H, D, T atoms","authors":"None Babenko P. Yu., None Mikhailov V. S., None Shergin A. P., None Zinoviev A. N.","doi":"10.21883/tp.2023.05.56074.12-23","DOIUrl":"https://doi.org/10.21883/tp.2023.05.56074.12-23","url":null,"abstract":"The results of modeling the sputtering coefficients of polycrystalline beryllium by hydrogen isotopes in the range of collision energies of 8 eV-100 keV and their dependences on the angle of incidence of the beam on the surface are presented. This data is necessary for estimating the sputtering of the first wall in the ITER tokamak made from beryllium. A strong surface shape influence on obtained results is shown. The limiting cases of a flat potential barrier (smooth surface) and a spherical potential barrier (a surface consisting of spikes) are considered. The effect of collision cascades on the sputtering coefficient has been established. The dependences of the average depth of sputtered particle formation on the bombarding particles energy are obtained for various angles of beam incidence on the target. The energy spectra and angular dependences of the ejection of sputtered particles are calculated for different energies of bombarding beam atoms. It is shown that the presence of an attractive well in the potential of an incident particle surface changes the sputtering coefficient dependence on incidence angle at small glancing angles. Keywords: Sputtering coefficients, energy and angular distributions of sputtered particles, interatomic potential, hydrogen isotopes, beryllium.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135988777","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}
Pub Date : 2023-01-01DOI: 10.21883/tp.2023.05.56075.14-23
None Louksha O. I., None Zuev A. S., None Malkin A. G., None Semenov E. S., None Trofimov P. A., None Glyavin M. Yu.
The influence of the spent electron beam parameters on the possibilities of multistage energy recovery in the prototype gyrotron developed for the DEMO project is determined. The characteristics of electrodes and magnetic coils in a collector with four-stage recovery were optimized considering the distributions of electrons' coordinates and velocities obtained as a result of calculating the electron-wave interaction in the cavity. In the trajectory analysis in the collector, a sectioned electron beam was used to suppress the negative influence of the bundles of a toroidal solenoid used to create an azimuthal magnetic field. The possibility of achieving the total efficiency of the gyrotron of approximately 78% was shown, which is close to the maximum total efficiency with ideal separation of electron fractions with different energies, with the current of electrons reflected from the collector not exceeding 1% of the total current of the electron beam. Keywords: Microwave electronics, gyrotron, electron beam, energy recovery.
{"title":"Trajectory analysis in a collector with multistage energy recovery for a DEMO prototype gyrotron. Part III. Influence of the spent electron beam parameters","authors":"None Louksha O. I., None Zuev A. S., None Malkin A. G., None Semenov E. S., None Trofimov P. A., None Glyavin M. Yu.","doi":"10.21883/tp.2023.05.56075.14-23","DOIUrl":"https://doi.org/10.21883/tp.2023.05.56075.14-23","url":null,"abstract":"The influence of the spent electron beam parameters on the possibilities of multistage energy recovery in the prototype gyrotron developed for the DEMO project is determined. The characteristics of electrodes and magnetic coils in a collector with four-stage recovery were optimized considering the distributions of electrons' coordinates and velocities obtained as a result of calculating the electron-wave interaction in the cavity. In the trajectory analysis in the collector, a sectioned electron beam was used to suppress the negative influence of the bundles of a toroidal solenoid used to create an azimuthal magnetic field. The possibility of achieving the total efficiency of the gyrotron of approximately 78% was shown, which is close to the maximum total efficiency with ideal separation of electron fractions with different energies, with the current of electrons reflected from the collector not exceeding 1% of the total current of the electron beam. Keywords: Microwave electronics, gyrotron, electron beam, energy recovery.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135988796","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.05.55458.273-22
В. Г. Кулеев
The physical reasons for the formation of peaks of that part of the magnetic permeability, which is caused by transitions of only 90-degree domain boundaries µ90(H0) in deformed steel U8 with coarse-plate perlite when the field changes along the back of the hysteresis loop, are considered. It is shown that the orientation relations of the Patch-Pitch between single-crystal ferrite and cementite plates in U8 steel lead to the appearance of a constant angle between the magnetic moments of these plates and, consequently, to the appearance of corresponding local scattering fields. The latter can significantly affect the values of the peak fields of the curve µ90(H0). Theoretical expressions for these fields containing contributions of scattering fields that should be taken into account when determining residual compressive stresses are obtained. It is also shown that to determine the residual stresses, two expressions for peak fields are not enough, and additional experiments are needed, as which it is proposed to use the dependences of the coercive force on elastic tensile stresses. This leads to a complication of the algorithm for determining residual compressive stresses in comparison with the case of low-carbon steels. A method for estimating the values of local scattering fields in the ferrite parts of U8 steel grains with residual compressive stresses is proposed.
{"title":"Влияние остаточных напряжений в стали У8 с грубопластинчатым перлитом на магнитную проницаемость","authors":"В. Г. Кулеев","doi":"10.21883/jtf.2023.05.55458.273-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.05.55458.273-22","url":null,"abstract":"The physical reasons for the formation of peaks of that part of the magnetic permeability, which is caused by transitions of only 90-degree domain boundaries µ90(H0) in deformed steel U8 with coarse-plate perlite when the field changes along the back of the hysteresis loop, are considered. It is shown that the orientation relations of the Patch-Pitch between single-crystal ferrite and cementite plates in U8 steel lead to the appearance of a constant angle between the magnetic moments of these plates and, consequently, to the appearance of corresponding local scattering fields. The latter can significantly affect the values of the peak fields of the curve µ90(H0). Theoretical expressions for these fields containing contributions of scattering fields that should be taken into account when determining residual compressive stresses are obtained. It is also shown that to determine the residual stresses, two expressions for peak fields are not enough, and additional experiments are needed, as which it is proposed to use the dependences of the coercive force on elastic tensile stresses. This leads to a complication of the algorithm for determining residual compressive stresses in comparison with the case of low-carbon steels. A method for estimating the values of local scattering fields in the ferrite parts of U8 steel grains with residual compressive stresses is proposed.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90786302","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.02.54491.142-22
А.А. Воскобоев, Владимир Александрович Кузьменко, В.С. Межевов, А.Р. Саутин
Experiments were continued to study the physical nature of the drift motion of SF6 molecules under the action of radiation from a repetitively pulsed CO2-laser. To explain the physical nature of the effect, such phenomena as a change in the transport cross-section during laser excitation of molecules, the phenomenon of optical tweezers, thermal diffusion are considered. However, the most reasonable physical explanation of the nature of this effect is the fractionation of a gas mixture as a result of gas dynamic diffusion at the front of a cyclically expanding gas (a variant of barodiffusion).
{"title":"Экспериментальное изучение дрейфового движения молекул SF-=SUB=-6-=/SUB=- под действием излучения CO-=SUB=-2-=/SUB=--лазера","authors":"А.А. Воскобоев, Владимир Александрович Кузьменко, В.С. Межевов, А.Р. Саутин","doi":"10.21883/jtf.2023.02.54491.142-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.02.54491.142-22","url":null,"abstract":"Experiments were continued to study the physical nature of the drift motion of SF6 molecules under the action of radiation from a repetitively pulsed CO2-laser. To explain the physical nature of the effect, such phenomena as a change in the transport cross-section during laser excitation of molecules, the phenomenon of optical tweezers, thermal diffusion are considered. However, the most reasonable physical explanation of the nature of this effect is the fractionation of a gas mixture as a result of gas dynamic diffusion at the front of a cyclically expanding gas (a variant of barodiffusion).","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84279120","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.07.55770.89-23
А. А. Дедкова, Игорь Васильевич Флоринский, А. К. Чернышев
We studied the use of morphometric variables (maximal curvature, minimal curvature, mean curvature, topographic index, etc.) for study of the surface of X-ray optical elements. We performed calculations on digital elevation models of a spherical concave substrates: primordial and smoothed digital elevation models, before and after technological operations (mechanical lapping, axisymmetric surface shape correction, ion beam figuring). We have demonstrated a visual display of weakly expressed topography inhomogeneities, incl. which are not displayed on the maps of the original digital elevation models. The consideration included the study of both the measured samples and the errors in the formation of the digital elevation model (artifacts from the recording system and from the inhomogeneity of the medium), as well as the features of scale decomposition when using the universal spectral-analytical method.
{"title":"Использование морфометрических величин при изучении рельефа поверхности рентгенооптических элементов","authors":"А. А. Дедкова, Игорь Васильевич Флоринский, А. К. Чернышев","doi":"10.21883/jtf.2023.07.55770.89-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.07.55770.89-23","url":null,"abstract":"We studied the use of morphometric variables (maximal curvature, minimal curvature, mean curvature, topographic index, etc.) for study of the surface of X-ray optical elements. We performed calculations on digital elevation models of a spherical concave substrates: primordial and smoothed digital elevation models, before and after technological operations (mechanical lapping, axisymmetric surface shape correction, ion beam figuring). We have demonstrated a visual display of weakly expressed topography inhomogeneities, incl. which are not displayed on the maps of the original digital elevation models. The consideration included the study of both the measured samples and the errors in the formation of the digital elevation model (artifacts from the recording system and from the inhomogeneity of the medium), as well as the features of scale decomposition when using the universal spectral-analytical method.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86775939","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.08.55983.61-23
С.Д. Самуйлов, И.П. Шербаков, Ю.Н. Бочаров, С. И. Кривошеев, С.Г. Магазинов
It is shown that the results of dispersion of various materials in the mode of pulsed current action correspond to theoretical estimates of the wavelength of MHD instability. The sizes of the obtained metal grain, including refractory ones, correspond to the modes of exposure, and their microstructure corresponds to the conditions of formation. Modeling in the Comsol Multiphysics environment at a qualitative level revealed the influence of the thickness of the surface layer of the current flow on the dynamics of the formation and separation of liquid metal droplets. It is shown that one of the operating factors that create and increase instabilities is the heterogeneity of the distribution of Lorentz forces in the current supply zone.
{"title":"Магнитогидродинамическая неустойчивость расплавленного импульсным током поверхностного слоя металла","authors":"С.Д. Самуйлов, И.П. Шербаков, Ю.Н. Бочаров, С. И. Кривошеев, С.Г. Магазинов","doi":"10.21883/jtf.2023.08.55983.61-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.08.55983.61-23","url":null,"abstract":"It is shown that the results of dispersion of various materials in the mode of pulsed current action correspond to theoretical estimates of the wavelength of MHD instability. The sizes of the obtained metal grain, including refractory ones, correspond to the modes of exposure, and their microstructure corresponds to the conditions of formation. Modeling in the Comsol Multiphysics environment at a qualitative level revealed the influence of the thickness of the surface layer of the current flow on the dynamics of the formation and separation of liquid metal droplets. It is shown that one of the operating factors that create and increase instabilities is the heterogeneity of the distribution of Lorentz forces in the current supply zone.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84147938","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.08.55985.74-23
Fan Zhang, M. Vergnat, В. А. Володин
Amorphous germanium nanoclusters were formed in the GeOx film on quartz as a result of the disproportionation reaction GeOx→(1- )Ge+ GeO2 during furnace annealing. To determine the reaction activation energy, annealing was carried out at temperatures from 400 to 500 oC. The appearance and growth of amorphous germanium nanoclusters were investigated using Raman spectroscopy. It was found that the position of the Raman scattering peak from amorphous germanium varied with the annealing time, which due to the change in the sizes of nanoclusters, i.e., the phonon localization model can be applied not only to germanium nanocrystals, but also to amorphous germanium clusters, in the case of their ultra-small sizes. In addition, it was found that the saturation time for the formation of amorphous germanium nanoclusters depends exponentially on the annealing temperature. The kinetics analysis of the nanocluster’s formation was carried out within the framework of the Johnson–Mehl–Avrami–Kolmogorov model. The activation energy of the disproportionation reaction was obtained for the first time, which amounted to 1.0±0.1 eV.
{"title":"Определение энергии активации реакции диспропорционирования аморфной пленки GeO-=SUB=-x-=/SUB=- на кварцевой подложке с использованием спектроскопии комбинационного рассеяния света","authors":"Fan Zhang, M. Vergnat, В. А. Володин","doi":"10.21883/jtf.2023.08.55985.74-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.08.55985.74-23","url":null,"abstract":"Amorphous germanium nanoclusters were formed in the GeOx film on quartz as a result of the disproportionation reaction GeOx→(1- )Ge+ GeO2 during furnace annealing. To determine the reaction activation energy, annealing was carried out at temperatures from 400 to 500 oC. The appearance and growth of amorphous germanium nanoclusters were investigated using Raman spectroscopy. It was found that the position of the Raman scattering peak from amorphous germanium varied with the annealing time, which due to the change in the sizes of nanoclusters, i.e., the phonon localization model can be applied not only to germanium nanocrystals, but also to amorphous germanium clusters, in the case of their ultra-small sizes. In addition, it was found that the saturation time for the formation of amorphous germanium nanoclusters depends exponentially on the annealing temperature. The kinetics analysis of the nanocluster’s formation was carried out within the framework of the Johnson–Mehl–Avrami–Kolmogorov model. The activation energy of the disproportionation reaction was obtained for the first time, which amounted to 1.0±0.1 eV.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81008061","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.01.54075.233-22
А.В. Хрестин, М. А. Павлейно, М С Сафонов
Numerical simulation of heating of the vicinity of contact spots of closed copper high-current contacts by short-circuit currents of various shapes is carried out. The relationship between the parameters of thermal and mechanical fields when heated to temperatures exceeding the recrystallization temperature of the material is established. The dynamics of changes in the sizes of elastic and plastic deformations and their localization is shown. It is revealed in which cases the results of heating the contact surroundings may differ significantly with the flow of thermally equivalent currents.
{"title":"Изменение характеристик контактных пятен при протекании токов короткого замыкания через замкнутые сильноточные электрические контакты","authors":"А.В. Хрестин, М. А. Павлейно, М С Сафонов","doi":"10.21883/jtf.2023.01.54075.233-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.01.54075.233-22","url":null,"abstract":"Numerical simulation of heating of the vicinity of contact spots of closed copper high-current contacts by short-circuit currents of various shapes is carried out. The relationship between the parameters of thermal and mechanical fields when heated to temperatures exceeding the recrystallization temperature of the material is established. The dynamics of changes in the sizes of elastic and plastic deformations and their localization is shown. It is revealed in which cases the results of heating the contact surroundings may differ significantly with the flow of thermally equivalent currents.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76528645","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}
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