[Text] : статья / O.V. Sadovskaya // Computational Plasticity XI. Fundamentals and Applications. - 2011. - p. 987-999
. - ISBN 978-84-89925-73-1
Полный текст
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Садовская, Оксана Викторовна; International Conference on Computational Plasticity. Fundamentals and Applications(XI ; 07-09 September 2011 ; Barcelona)
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Найдено документов в текущей БД: 14
Rheological Method for Constructing Constitutive Equations of One-Phase Granular and Porous Materials
[Text] : статья / V. M. Sadovsky // Computational Plasticity XI. Fundamentals and Applications. - 2011. - p. 909-921
. - ISBN 978-84-89925-73-1
Полный текст
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Садовский, Владимир Михайлович; International Conference on Computational Plasticity. Fundamentals and Applications(XI ; 07-09 September 2011 ; Barcelona)
Полный текст
Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44
Доп.точки доступа:
Садовский, Владимир Михайлович; International Conference on Computational Plasticity. Fundamentals and Applications(XI ; 07-09 September 2011 ; Barcelona)
Parallel Program Systems for Modeling Elastic-Plastic Waves in Structurally Inhomogeneous Materials
/ V. M. Sadovskii, O. V. Sadovskaya ; ed. by T.E.Simos [et al.] // NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2012), VOLS A AND B. Ser. AIP Conference Proceedings : AMER INST PHYSICS, 2012. - Vol. 1479: International Conference of Numerical Analysis and Applied Mathematics (ICNAAM) (SEP 19-25, 2012, Kos, GREECE). - pp. 1611-1614, DOI 10.1063/1.4756474. - Cited References: 4
. - ISBN 0094-243X. - ISBN 978-0-7354-1091-6
РУБ Mathematics, Applied + Physics, Applied
Кл.слова (ненормированные):
Dynamics -- Rheology -- Microstructure -- Elasticity -- Plasticity -- Granular material -- Cosserat continuum -- Shock wave -- Variational inequality -- Finite-difference scheme -- Parallel computational algorithm
Аннотация: Parallel program systems for numerical solution of 2D and 3D problems of the dynamics of deformable media with constitutive relationships of rather general form on the basis of universal mathematical model describing small strains of elastic, elastic-plastic and granular materials are worked out. Some computations of dynamic problems with and without taking into account the moment properties of a material were performed on supercomputers with cluster architecture.
РИНЦ
Доп.точки доступа:
Sadovskii, V.M.; Садовский, Владимир Михайлович; Sadovskaya, O.V.; Садовская, Оксана Викторовна; Simos, T.E. \ed.\; Psihoyios, G. \ed.\; Tsitouras, C. \ed.\
Кл.слова (ненормированные):
Dynamics -- Rheology -- Microstructure -- Elasticity -- Plasticity -- Granular material -- Cosserat continuum -- Shock wave -- Variational inequality -- Finite-difference scheme -- Parallel computational algorithm
Аннотация: Parallel program systems for numerical solution of 2D and 3D problems of the dynamics of deformable media with constitutive relationships of rather general form on the basis of universal mathematical model describing small strains of elastic, elastic-plastic and granular materials are worked out. Some computations of dynamic problems with and without taking into account the moment properties of a material were performed on supercomputers with cluster architecture.
РИНЦ
Доп.точки доступа:
Sadovskii, V.M.; Садовский, Владимир Михайлович; Sadovskaya, O.V.; Садовская, Оксана Викторовна; Simos, T.E. \ed.\; Psihoyios, G. \ed.\; Tsitouras, C. \ed.\
Parallel program systems for problems of the dynamics of elastic-plastic and granular media
/ O. V. Sadovskaya // Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - 2013. - Vol. 8236 LNCS: 5th International Conference on Numerical Analysis and Applications, NAA 2012 (15 June 2013 through 20 June 2013, Lozenetz. - P471-478, DOI 10.1007/978-3-642-41515-9_53
. -
Кл.слова (ненормированные):
Cosserat continuum -- Dynamics -- elasticity -- granular medium -- parallel computational algorithm -- plasticity -- shock-capturing method
Аннотация: Parallel program systems for numerical solution of 2D and 3D problems of the dynamics of deformable media with constitutive relationships of rather general form on the basis of universal mathematical model describing small strains of elastic, elastic-plastic and granular materials are worked out. Computational algorithm is based on the splitting methods with respect to physical processes and spatial variables. Some computations of dynamic problems with and without taking into account the moment properties of a material were performed on clusters. В© 2013 Springer-Verlag.
Scopus,
Полный текст
Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok 50/44, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Sadovskaya, O.V.; Садовская, Оксана Викторовна
Кл.слова (ненормированные):
Cosserat continuum -- Dynamics -- elasticity -- granular medium -- parallel computational algorithm -- plasticity -- shock-capturing method
Аннотация: Parallel program systems for numerical solution of 2D and 3D problems of the dynamics of deformable media with constitutive relationships of rather general form on the basis of universal mathematical model describing small strains of elastic, elastic-plastic and granular materials are worked out. Computational algorithm is based on the splitting methods with respect to physical processes and spatial variables. Some computations of dynamic problems with and without taking into account the moment properties of a material were performed on clusters. В© 2013 Springer-Verlag.
Scopus,
Полный текст
Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok 50/44, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Sadovskaya, O.V.; Садовская, Оксана Викторовна
Radial expansion of a cylindrical or spherical cavity in an infinite porous medium
[Text] / V. M. Sadovskii, O. V. Sadovskaya, A. A. Luk'yanov // J. Appl. Mech. Tech. Phys. - 2014. - Vol. 55, Is. 4. - P689-700, DOI 10.1134/S0021894414040154. - Cited References: 18. - This work was supported by the Russian Foundation for Basic Research (Grant No. 14-01-00130).
. - ISSN 0021-8944. - ISSN 1573-8620
РУБ Mechanics + Physics, Applied
Аннотация: A solution describing the displacement and stress fields around expanding spherical and cylindrical cavities with allowance for pore collapse is constructed using the theory of small elastic deformations of a homogeneous isotropic porous medium in closed form. Transition of the medium into a plastic state is modeled using the Tresca-Saint Venant yield condition. Porosity change is described on the basis of a mathematical model developed taking into account the increase in the stiffness of the porous material at the moment of pore collapse. It is shown that in the elastic deformation stage, the porosity does not change; an increase in the pressure leads to the formation of a region of plastic compression, in part of which, the pores collapse. Stress and displacement fields in the porous medium during unloading are constructed. It is shown that under certain conditions, the elastic unloading stage is followed by the plastic reflow stage to form a region of pore expansion. As the pressure decreases, the boundary of this region simultaneously reaches the region of plastic reflow and the region of pore collapse.
Полный текст (доступен только в локальной сети),
WOS,
Scopus
Держатели документа:
ИВМ СО РАН
Доп.точки доступа:
Sadovskii, V.M.; Садовский, Владимир Михайлович; Sadovskaya, O.V.; Садовская, Оксана Викторовна; Luk'yanov, A.A.; Russian Foundation for Basic Research [14-01-00130]
Рубрики:
DYNAMIC PORE-COLLAPSE
Кл.слова (ненормированные):
porous media -- elasticity -- plasticity -- pore collapse unloading -- pore expansion
DYNAMIC PORE-COLLAPSE
Кл.слова (ненормированные):
porous media -- elasticity -- plasticity -- pore collapse unloading -- pore expansion
Аннотация: A solution describing the displacement and stress fields around expanding spherical and cylindrical cavities with allowance for pore collapse is constructed using the theory of small elastic deformations of a homogeneous isotropic porous medium in closed form. Transition of the medium into a plastic state is modeled using the Tresca-Saint Venant yield condition. Porosity change is described on the basis of a mathematical model developed taking into account the increase in the stiffness of the porous material at the moment of pore collapse. It is shown that in the elastic deformation stage, the porosity does not change; an increase in the pressure leads to the formation of a region of plastic compression, in part of which, the pores collapse. Stress and displacement fields in the porous medium during unloading are constructed. It is shown that under certain conditions, the elastic unloading stage is followed by the plastic reflow stage to form a region of pore expansion. As the pressure decreases, the boundary of this region simultaneously reaches the region of plastic reflow and the region of pore collapse.
Полный текст (доступен только в локальной сети),
WOS,
Scopus
Держатели документа:
ИВМ СО РАН
Доп.точки доступа:
Sadovskii, V.M.; Садовский, Владимир Михайлович; Sadovskaya, O.V.; Садовская, Оксана Викторовна; Luk'yanov, A.A.; Russian Foundation for Basic Research [14-01-00130]
Phenomenological modeling ofdeformation of porous and cellular materials taking into account the increase in stiffness because of the collapse of pores
[Text] / V. M. Sadovskii, O. V. Sadovskaya // ECCOMAS Thematic Conference - COMPDYN 2013: 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings - An IACM Special Interest Conference. - 2013. - P4277-4286
Кл.слова (ненормированные):
Cellular Material -- Porous Metal -- Expansion of Cavity -- Incomplete Plasticity -- Full Plasticity -- Parallel Program System
Аннотация: Mathematical model for the description of deformation of a porous material with a random distribution of pores is constructed on the basis of generalized rheological method taking into account the different resistance of a material to tension and compression. Phenomenological parameters of the model are determined by means of the approximate computations for the problem of static loading of a cubic periodicity cell with spherical cavities. Within the framework of this theory the fields of displacements and stresses around expanding cavity of spherical shape in a homogenious space are constructed. It is shown that the porosity does not change at the stage of elastic deformation. When the pressure increases, a zone of plastic compaction is formed in the vicinity of a cavity, and in a part of this zone the collapse of pores takes place. Engineering formulas for calculation of critical pressures of the elastic limit state and the limit state of a medium with open pores, and also the formulas for determining the radiuses of interfaces of zones of plasticity and compaction are obtained. A complex of parallel programs for numerical analysis of the dynamic deformation of porous materials on multiprocessor computer systems is worked out. By means of this complex a series of computations for deformation of the protection elements, made of metal foams, under the action of localizedim pulsive loads was performed. The random nature of distribution of the pores size is taken into account with the help of computer modeling. Computations allow one to estimate plastic dissipative part of the energy of impact.
Scopus,
Полный текст на сайте конференции,
Полный текст
Доп.точки доступа:
Sadovskaya, O.V.; Садовская, Оксана Викторовна; Садовский, Владимир Михайлович
Кл.слова (ненормированные):
Cellular Material -- Porous Metal -- Expansion of Cavity -- Incomplete Plasticity -- Full Plasticity -- Parallel Program System
Аннотация: Mathematical model for the description of deformation of a porous material with a random distribution of pores is constructed on the basis of generalized rheological method taking into account the different resistance of a material to tension and compression. Phenomenological parameters of the model are determined by means of the approximate computations for the problem of static loading of a cubic periodicity cell with spherical cavities. Within the framework of this theory the fields of displacements and stresses around expanding cavity of spherical shape in a homogenious space are constructed. It is shown that the porosity does not change at the stage of elastic deformation. When the pressure increases, a zone of plastic compaction is formed in the vicinity of a cavity, and in a part of this zone the collapse of pores takes place. Engineering formulas for calculation of critical pressures of the elastic limit state and the limit state of a medium with open pores, and also the formulas for determining the radiuses of interfaces of zones of plasticity and compaction are obtained. A complex of parallel programs for numerical analysis of the dynamic deformation of porous materials on multiprocessor computer systems is worked out. By means of this complex a series of computations for deformation of the protection elements, made of metal foams, under the action of localizedim pulsive loads was performed. The random nature of distribution of the pores size is taken into account with the help of computer modeling. Computations allow one to estimate plastic dissipative part of the energy of impact.
Scopus,
Полный текст на сайте конференции,
Полный текст
Доп.точки доступа:
Sadovskaya, O.V.; Садовская, Оксана Викторовна; Садовский, Владимир Михайлович
Mathematical Modeling of a Metal Foam as an Elastic-Plastic Continuum with Changing Resistance
[Text] / V. M. Sadovskii, O. V. Sadovskaya // AIP Conference Proceedings. - 2015. - Vol. 1648: International Conference on Numerical Analysis and Applied Mathematics (SEP 22-28, 2014, Rhodes, GREECE). - Ст. UNSP 630005, DOI 10.1063/1.4912863. - Cited References:6
. - ISSN 0094-243X
РУБ Mathematics, Applied + Physics, Applied
Аннотация: Mathematical model for the description of deformation of a porous metal is constructed on the basis of generalized rheological method, taking into account change in the resistance to external loads, when the collapse of pores occurs. Irreversible deformation is described with the help of yield condition, modeling the plastic loss of stability of a porous skeleton. For a homogeneous porous medium the fields of displacements and stresses in the problem of radial expansion of spherical and cylindrical cavities under the action of internal pressure considering the effect of collapse of pores are constructed in closed form. The algorithm of numerical realization of the model of dynamic deformation of metal foams on multiprocessor computer systems of the cluster type is worked out.
WOS,
Полный текст на сайте правообладателя,
Scopus
Держатели документа:
SB RAS, Inst Computat Modeling, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Sadovskii, V.M.; Садовский, Владимир Михайлович; Sadovskaya, O.V.; Садовская, Оксана Викторовна
Рубрики:
DEFORMATION
Кл.слова (ненормированные):
Rheology -- Elasticity -- Plasticity -- Porous medium -- Expansion of cavity -- Finite-difference scheme -- Parallel computational algorithm
DEFORMATION
Кл.слова (ненормированные):
Rheology -- Elasticity -- Plasticity -- Porous medium -- Expansion of cavity -- Finite-difference scheme -- Parallel computational algorithm
Аннотация: Mathematical model for the description of deformation of a porous metal is constructed on the basis of generalized rheological method, taking into account change in the resistance to external loads, when the collapse of pores occurs. Irreversible deformation is described with the help of yield condition, modeling the plastic loss of stability of a porous skeleton. For a homogeneous porous medium the fields of displacements and stresses in the problem of radial expansion of spherical and cylindrical cavities under the action of internal pressure considering the effect of collapse of pores are constructed in closed form. The algorithm of numerical realization of the model of dynamic deformation of metal foams on multiprocessor computer systems of the cluster type is worked out.
WOS,
Полный текст на сайте правообладателя,
Scopus
Держатели документа:
SB RAS, Inst Computat Modeling, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Sadovskii, V.M.; Садовский, Владимир Михайлович; Sadovskaya, O.V.; Садовская, Оксана Викторовна
Variational and hemivariational inequalities in mechanics of elastoplastic, granular media, and quasibrittle cracks
/ B. D. Annin, V. A. Kovtunenko, V. M. Sadovskii // Springer Proceedings in Mathematics and Statistics. - 2015. - Vol. 121: 2nd International Conference on Applied Mathematics and Informatics, ICAMI 2013 (24 November 2013 through 29 November 2013, ) Conference code: 136889. - P49-56, DOI 10.1007/978-3-319-12583-1_3
. -
Кл.слова (ненормированные):
(Hemi)variational inequality -- Constrained optimization -- Granular solid -- Nonconvex optimization -- Nonsmooth optimization -- Plasticity -- Quasibrittle crack -- Set-valued optimization -- Cracks -- Elastoplasticity -- Plasticity -- Variational techniques -- Granular solids -- Nonconvex optimization -- Nonsmooth optimization -- Set-valued optimization -- Variational inequalities -- Constrained optimization
Аннотация: This contribution is devoted to the mathematical theory of elastoplastic and granular solids as well as the quasibrittle fracture of nonlinear cracks. Basic variational and hemivariational inequalities describing nonlinear phenomena due to plasticity, internal friction, interfacial interaction, and alike dissipative physics are outlined from the point of view of nonsmooth and nonconvex optimization. Primary results of the nonlinear theory and its application to solid mechanics are surveyed. © Springer International Publishing Switzerland 2015.
Scopus,
WOS,
Смотреть статью
Держатели документа:
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
Institute for Mathematics and Scientific Computing, Karl-Franzens University of Graz, NAWI Graz, Heinrichstr. 36, Graz, Austria
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk State University, Novosibirsk, Russian Federation
Institute of Computational Modeling, Siberian Branch of the Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Annin, B. D.; Kovtunenko, V. A.; Sadovskii, V. M.
Кл.слова (ненормированные):
(Hemi)variational inequality -- Constrained optimization -- Granular solid -- Nonconvex optimization -- Nonsmooth optimization -- Plasticity -- Quasibrittle crack -- Set-valued optimization -- Cracks -- Elastoplasticity -- Plasticity -- Variational techniques -- Granular solids -- Nonconvex optimization -- Nonsmooth optimization -- Set-valued optimization -- Variational inequalities -- Constrained optimization
Аннотация: This contribution is devoted to the mathematical theory of elastoplastic and granular solids as well as the quasibrittle fracture of nonlinear cracks. Basic variational and hemivariational inequalities describing nonlinear phenomena due to plasticity, internal friction, interfacial interaction, and alike dissipative physics are outlined from the point of view of nonsmooth and nonconvex optimization. Primary results of the nonlinear theory and its application to solid mechanics are surveyed. © Springer International Publishing Switzerland 2015.
Scopus,
WOS,
Смотреть статью
Держатели документа:
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
Institute for Mathematics and Scientific Computing, Karl-Franzens University of Graz, NAWI Graz, Heinrichstr. 36, Graz, Austria
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk State University, Novosibirsk, Russian Federation
Institute of Computational Modeling, Siberian Branch of the Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Annin, B. D.; Kovtunenko, V. A.; Sadovskii, V. M.
Численное моделирование деформации пористых металлов
[Текст] : статья / В. М. Садовский, О. В. Садовская // Решетневские чтения. - 2015. - Т. 2, № 19. - С. 158-160
. - ISSN 1990-7702
Перевод заглавия: Numerical modeling porous metals deformation
Кл.слова (ненормированные):
porous medium -- rheology -- elasticity -- plasticity -- dynamics -- parallel computations -- пористая среда -- реология -- упругость -- пластичность -- динамика -- параллельные вычисления
Аннотация: На основе обобщенного реологического метода построена математическая модель упруго-пластического деформирования пористых металлов, которые могут применяться в аэрокосмической промышленности в качестве легковесных наполнителей. Разработан алгоритм численной реализации модели на многопроцессорных вычислительных системах.
Based on the generalized rheological method, we construct the mathematical model of elastic-plastic deformation of porous metals, which can be used as lightweight fillers in the aerospace industry. We develop the algorithm for numerical implementation of this model on clusters.
РИНЦ,
Полный текст
Держатели документа:
Институт вычислительного моделирования СО РАН
Доп.точки доступа:
Sadovskaya O.V.
Перевод заглавия: Numerical modeling porous metals deformation
| УДК |
Кл.слова (ненормированные):
porous medium -- rheology -- elasticity -- plasticity -- dynamics -- parallel computations -- пористая среда -- реология -- упругость -- пластичность -- динамика -- параллельные вычисления
Аннотация: На основе обобщенного реологического метода построена математическая модель упруго-пластического деформирования пористых металлов, которые могут применяться в аэрокосмической промышленности в качестве легковесных наполнителей. Разработан алгоритм численной реализации модели на многопроцессорных вычислительных системах.
Based on the generalized rheological method, we construct the mathematical model of elastic-plastic deformation of porous metals, which can be used as lightweight fillers in the aerospace industry. We develop the algorithm for numerical implementation of this model on clusters.
РИНЦ,
Полный текст
Держатели документа:
Институт вычислительного моделирования СО РАН
Доп.точки доступа:
Sadovskaya O.V.
621.746
П535
П535
ПОЛУЧЕНИЕ ДЕТАЛЕЙ ТРАНСПОРТНОГО СРЕДСТВА ЖИДКОЙ ШТАМПОВКОЙ ИЗ СПЛАВА АК7
[Текст] : статья / Г. Г. Крушенко // Вестник Сибирского государственного аэрокосмического университета им. академика М.Ф. Решетнева. - 2016. - Т. 17, № 1. - С. 194-199
. - ISSN 1816-9724
Перевод заглавия: THE MANUFACTURE OF PARTS OF THE VEHICLE BY LIQUID FORGING OUT OF ALLOY АК7
Кл.слова (ненормированные):
алюминиевый сплав -- модифицирование -- нанопорошок -- жидкая штамповка -- aluminum alloy -- inoculation -- nanopowder -- Liquid forging
Аннотация: Описана практически новая технология производства деталей в приложении к деталям летательной аппаратуры, изготовляемых из алюминиевых сплавов, сочетающая как подготовку расплава к литью, так и способ изготовления собственно детали. Исследование проведено на известном литейном алюминиево-кремниевом сплаве АК7ч, широко применяющемся в аэрокосмической отрасли для изготовления деталей силовых агрегатов, работающих в сложнонагруженных условиях. Подготовка расплава к литью, кроме общепринятых приемов, заключалась во введении в жидкий металл перед заливкой нанопорошка карбида бора В<sub>4</sub>С, частицы которого имеют размеры нанодиапазона и отличаются высокой твердостью и температурой плавления, в связи с чем выполняют роль эффективных центров кристаллизации - так называемых модификаторов. Результатом их введения в расплав является измельчение структуры сплава получаемых изделий, что приводит к повышению их механических свойств. Способ получения деталей из модифицированного карбидом бора сплава заключается в применении для этой цели технологии жидкой штамповки, суть которой заключается в заливке расплава в матрицу с последующим прессованием. Основной положительной характеристикой этого способа является подавление образования в кристаллизующемся сплаве газово-усадочных пустот, что также способствует росту механических свойств прессованных деталей. Работа проведена на реальной детали летательной аппаратуры типа «переходник» силового агрегата. При этом в результате сочетания модифицирования расплава нанопорошком карбида бора и последующего его прессования были получены детали с более высокими механическими свойствами по сравнению со стандартной технологией: временное сопротивление повысилось на 8,37 %, а пластичность - в 2,1 раза.
This article describes a new technology for the production of parts in the application to the parts of aircraft equipment, manufactured from aluminum alloys, combining the preparation of the melt to the casting, and a method of manufacturing the actual details. The study was conducted on a known casting aluminum-silicon alloy AK7ч widely used in the aerospace industry, for the manufacture of power units parts operating in difficult-loaded conditions. Preparation of the melt to the casting, in addition to the conventional techniques, was introducing into the molten metal before pouring nanopowder of boron carbide В<sub>4</sub>С, the particles of which have dimensions of the nano-range and high hardness melting temperature, and therefore perform the role of an effective crystallization centers - so-called modifiers. The result of their introduction into the melt is a refinement of the structure of the alloy of the products obtained, which leads to the improvement of their mechanical properties. The method of obtaining details of the modified boron carbide alloy is used for this purpose, the technology of liquid forging, the essence of which consists in pouring the melt into the matrix, followed by pressing. The main positive feature of this method is the suppression of education in the crystallized alloy gas-shrinkage cavities, which also contributes to increase the mechanical properties of the molded parts. The work has been done on a real part of the aircraft equipment type “adapter” power unit. In the result of a combination of inoculation of melt nanopowder of boron carbide and its subsequent pressing were the items received with higher mechanical properties compared to standard technology - temporal resistance increased to 8.37 per cent, and plasticity - in 2.1 times.
РИНЦ
Держатели документа:
Институт вычислительного моделирования СО РАН
Доп.точки доступа:
Krushenko G.G.
Перевод заглавия: THE MANUFACTURE OF PARTS OF THE VEHICLE BY LIQUID FORGING OUT OF ALLOY АК7
| УДК |
Кл.слова (ненормированные):
алюминиевый сплав -- модифицирование -- нанопорошок -- жидкая штамповка -- aluminum alloy -- inoculation -- nanopowder -- Liquid forging
Аннотация: Описана практически новая технология производства деталей в приложении к деталям летательной аппаратуры, изготовляемых из алюминиевых сплавов, сочетающая как подготовку расплава к литью, так и способ изготовления собственно детали. Исследование проведено на известном литейном алюминиево-кремниевом сплаве АК7ч, широко применяющемся в аэрокосмической отрасли для изготовления деталей силовых агрегатов, работающих в сложнонагруженных условиях. Подготовка расплава к литью, кроме общепринятых приемов, заключалась во введении в жидкий металл перед заливкой нанопорошка карбида бора В<sub>4</sub>С, частицы которого имеют размеры нанодиапазона и отличаются высокой твердостью и температурой плавления, в связи с чем выполняют роль эффективных центров кристаллизации - так называемых модификаторов. Результатом их введения в расплав является измельчение структуры сплава получаемых изделий, что приводит к повышению их механических свойств. Способ получения деталей из модифицированного карбидом бора сплава заключается в применении для этой цели технологии жидкой штамповки, суть которой заключается в заливке расплава в матрицу с последующим прессованием. Основной положительной характеристикой этого способа является подавление образования в кристаллизующемся сплаве газово-усадочных пустот, что также способствует росту механических свойств прессованных деталей. Работа проведена на реальной детали летательной аппаратуры типа «переходник» силового агрегата. При этом в результате сочетания модифицирования расплава нанопорошком карбида бора и последующего его прессования были получены детали с более высокими механическими свойствами по сравнению со стандартной технологией: временное сопротивление повысилось на 8,37 %, а пластичность - в 2,1 раза.
This article describes a new technology for the production of parts in the application to the parts of aircraft equipment, manufactured from aluminum alloys, combining the preparation of the melt to the casting, and a method of manufacturing the actual details. The study was conducted on a known casting aluminum-silicon alloy AK7ч widely used in the aerospace industry, for the manufacture of power units parts operating in difficult-loaded conditions. Preparation of the melt to the casting, in addition to the conventional techniques, was introducing into the molten metal before pouring nanopowder of boron carbide В<sub>4</sub>С, the particles of which have dimensions of the nano-range and high hardness melting temperature, and therefore perform the role of an effective crystallization centers - so-called modifiers. The result of their introduction into the melt is a refinement of the structure of the alloy of the products obtained, which leads to the improvement of their mechanical properties. The method of obtaining details of the modified boron carbide alloy is used for this purpose, the technology of liquid forging, the essence of which consists in pouring the melt into the matrix, followed by pressing. The main positive feature of this method is the suppression of education in the crystallized alloy gas-shrinkage cavities, which also contributes to increase the mechanical properties of the molded parts. The work has been done on a real part of the aircraft equipment type “adapter” power unit. In the result of a combination of inoculation of melt nanopowder of boron carbide and its subsequent pressing were the items received with higher mechanical properties compared to standard technology - temporal resistance increased to 8.37 per cent, and plasticity - in 2.1 times.
РИНЦ
Держатели документа:
Институт вычислительного моделирования СО РАН
Доп.точки доступа:
Krushenko G.G.
Numerical algorithm based on implicit finite-difference schemes for analysis of dynamic processes in blocky media
/ V. M. Sadovskii, O. V. Sadovskaya // Russ. J. Numer. Anal. Math. Model. - 2018. - Vol. 33, Is. 2. - P111-121, DOI 10.1515/rnam-2018-0010. - Cited References:21
. - ISSN 0927-6467. - ISSN 1569-3988
РУБ Engineering, Multidisciplinary + Mathematics, Applied
Аннотация: Dynamic processes in block-structured media are described within the framework of a mathematical model where elastic blocks interact with each other through pliable interlayers possessing complex mechanical properties. The case of elastic interaction is considered, the effects of plasticity and viscoelastic shear in block interlayers are taken into account. We use the model of porous fluid-saturated material in interlayers in which pores collapse during sudden or prolonged application of compressive stresses. An implicit difference scheme is constructed for numerical implementation of the model based on principles for construction of Ivanov's schemes with controlled energy dissipation. UsingMPI (Message Passing Interface), we developed parallel software for modelling wave motion in a two-dimensional formulation. The results of numerical analysis are presented for the waves initiated by rotation of blocks, which indicates a strong anisotropy of the blocky medium.
WOS,
Смотреть статью,
Scopus
Держатели документа:
RAS, Inst Computat Modelling, Siberian Branch, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Sadovskii, Vladimir M.; Sadovskaya, Oxana V.
Рубрики:
COSSERAT CONTINUUM
WAVE-PROPAGATION
ELASTIC-WAVES
RECONSTRUCTION
Кл.слова (ненормированные):
Blocky medium -- elastic blocks -- porous and fluid-saturated interlayers -- high-performance computing
COSSERAT CONTINUUM
WAVE-PROPAGATION
ELASTIC-WAVES
RECONSTRUCTION
Кл.слова (ненормированные):
Blocky medium -- elastic blocks -- porous and fluid-saturated interlayers -- high-performance computing
Аннотация: Dynamic processes in block-structured media are described within the framework of a mathematical model where elastic blocks interact with each other through pliable interlayers possessing complex mechanical properties. The case of elastic interaction is considered, the effects of plasticity and viscoelastic shear in block interlayers are taken into account. We use the model of porous fluid-saturated material in interlayers in which pores collapse during sudden or prolonged application of compressive stresses. An implicit difference scheme is constructed for numerical implementation of the model based on principles for construction of Ivanov's schemes with controlled energy dissipation. UsingMPI (Message Passing Interface), we developed parallel software for modelling wave motion in a two-dimensional formulation. The results of numerical analysis are presented for the waves initiated by rotation of blocks, which indicates a strong anisotropy of the blocky medium.
WOS,
Смотреть статью,
Scopus
Держатели документа:
RAS, Inst Computat Modelling, Siberian Branch, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Sadovskii, Vladimir M.; Sadovskaya, Oxana V.
Mathematical and numerical modelling of porous geomaterials based on generalized rheological approach
/ V. M. Sadovskii, O. V. Sadovskaya // 9th Australasian Congress on Applied Mechanics, ACAM 2017 : National Committee on Applied Mechanics, 2017. - Vol. 2017-November: 9th Australasian Congress on Applied Mechanics, ACAM 2017 (27 November 2017 through 29 November 2017, ) Conference code: 135086
. -
Кл.слова (ненормированные):
Elasticity -- Granular medium -- Parallel algorithm -- Plasticity -- Porous geomaterial -- Rheology -- Elasticity -- Geometry -- Interface states -- Parallel algorithms -- Plasticity -- Porous materials -- Rheology -- Shock waves -- Supercomputers -- Characteristic zones -- Computational algorithm -- Elastic longitudinal waves -- Geomaterials -- Granular medium -- Instantaneous loading -- Longitudinal compression -- Tension and compression -- Compaction
Аннотация: Traditional rheological method is supplemented by a new element called rigid contact, which serves to take into account different resistance of materials to tension and compression. Based on this method, mathematical model describing deformation of a porous medium is constructed, which takes into account change in the resistance to external mechanical impact at a moment of collapse of pores. Parallel computational algorithm is developed for the analysis of dynamics of porous materials, accompanied by plastic deformation of skeleton and collapse of pores. This algorithm is tested on supercomputers in the problems about propagation of plane longitudinal compression shock waves and the expansion of cylindrical cavity in an infinite porous medium. The solutions of these problems are obtained in closed form in the framework of the suggested mathematical model. It is shown that, depending on the porosity of the medium and the value of the yield point, the instantaneous loading of a half-space with constant pressure leads to the formation of one or two shock waves – an elastic longitudinal wave, a plastic wave or waves of elastic or plastic compaction. Critical pressures of limit states and radii of interfaces between characteristic zones of plasticity and compaction are calculated numerically in the problem of radial expansion of cavity with sufficiently high precision. © 2017 National Committee on Applied Mechanics. All Rights Reserved.
Scopus
Держатели документа:
Institute of Computational Modelling SB RAS, Akademgorodok 50/44, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Sadovskii, V. M.; Sadovskaya, O. V.
Кл.слова (ненормированные):
Elasticity -- Granular medium -- Parallel algorithm -- Plasticity -- Porous geomaterial -- Rheology -- Elasticity -- Geometry -- Interface states -- Parallel algorithms -- Plasticity -- Porous materials -- Rheology -- Shock waves -- Supercomputers -- Characteristic zones -- Computational algorithm -- Elastic longitudinal waves -- Geomaterials -- Granular medium -- Instantaneous loading -- Longitudinal compression -- Tension and compression -- Compaction
Аннотация: Traditional rheological method is supplemented by a new element called rigid contact, which serves to take into account different resistance of materials to tension and compression. Based on this method, mathematical model describing deformation of a porous medium is constructed, which takes into account change in the resistance to external mechanical impact at a moment of collapse of pores. Parallel computational algorithm is developed for the analysis of dynamics of porous materials, accompanied by plastic deformation of skeleton and collapse of pores. This algorithm is tested on supercomputers in the problems about propagation of plane longitudinal compression shock waves and the expansion of cylindrical cavity in an infinite porous medium. The solutions of these problems are obtained in closed form in the framework of the suggested mathematical model. It is shown that, depending on the porosity of the medium and the value of the yield point, the instantaneous loading of a half-space with constant pressure leads to the formation of one or two shock waves – an elastic longitudinal wave, a plastic wave or waves of elastic or plastic compaction. Critical pressures of limit states and radii of interfaces between characteristic zones of plasticity and compaction are calculated numerically in the problem of radial expansion of cavity with sufficiently high precision. © 2017 National Committee on Applied Mechanics. All Rights Reserved.
Scopus
Держатели документа:
Institute of Computational Modelling SB RAS, Akademgorodok 50/44, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Sadovskii, V. M.; Sadovskaya, O. V.
539.37
О-13
О-13
ОБ ОПРЕДЕЛЯЮЩИХ УРАВНЕНИЯХ ВОЛОКНИСТЫХ КОМПОЗИТОВ, ПО-РАЗНОМУ СОПРОТИВЛЯЮЩИХСЯ РАСТЯЖЕНИЮ И СЖАТИЮ
[Текст] : статья / В. М. Садовский, О. В. Садовская, И. Е. Петраков // Решетневские чтения. - 2018. - Т. 1, № 22. - С. 578-580
. - ISSN 1990-7702
Перевод заглавия: ON CONSTITUTIVE EQUATIONS OF FIBROUS COMPOSITES, DIFFERENTLY RESISTANT TO TENSION AND COMPRESSION
Кл.слова (ненормированные):
волокнистый композит -- упругость -- пластичность -- вязкость -- реологическая схема -- вариационное неравенство -- fibrous composite -- elasticity -- plasticity -- viscosity -- Rheological scheme -- variational inequality
Аннотация: Предложен метод построения определяющих соотношений общего вида, учитывающих упругие, пластические и вязкие свойства волокнистых композитных материалов, по-разному сопротивляющихся растяжению и сжатию.
We developed the method of constructing constitutive equations of a general form, taking into account elastic, plastic and viscous properties of fibrous composite materials, which differ in their resistance to tension and compression.
РИНЦ
Держатели документа:
Институт вычислительного моделирования СО РАН
Доп.точки доступа:
Садовский, В.М.; Sadovskii V.M.; Садовская, О.В.; Sadovskaya O.V.; Петраков, И.Е.; Petrakov I.E.
Перевод заглавия: ON CONSTITUTIVE EQUATIONS OF FIBROUS COMPOSITES, DIFFERENTLY RESISTANT TO TENSION AND COMPRESSION
| УДК |
Кл.слова (ненормированные):
волокнистый композит -- упругость -- пластичность -- вязкость -- реологическая схема -- вариационное неравенство -- fibrous composite -- elasticity -- plasticity -- viscosity -- Rheological scheme -- variational inequality
Аннотация: Предложен метод построения определяющих соотношений общего вида, учитывающих упругие, пластические и вязкие свойства волокнистых композитных материалов, по-разному сопротивляющихся растяжению и сжатию.
We developed the method of constructing constitutive equations of a general form, taking into account elastic, plastic and viscous properties of fibrous composite materials, which differ in their resistance to tension and compression.
РИНЦ
Держатели документа:
Институт вычислительного моделирования СО РАН
Доп.точки доступа:
Садовский, В.М.; Sadovskii V.M.; Садовская, О.В.; Sadovskaya O.V.; Петраков, И.Е.; Petrakov I.E.
Supercomputing analysis of seismic efficiency of the electromagnetic pulse source "yenisei"
/ O. V. Sadovskaya, V. M. Sadovskii // AIP Conference Proceedings : American Institute of Physics Inc., 2019. - Vol. 2164: 11th International Conference for Promoting the Application of Mathematics in Technical and Natural Sciences, AMiTaNS 2019 (20 June 2019 through 25 June 2019, ) Conference code: 153460. - Ст. 110011, DOI 10.1063/1.5130856
. -
Аннотация: Computational technology is developed for numerical modeling of wave fields generated by the electromagnetic pulse source "Yenisei" in blocky-layered geological media. Mathematical models of soils and rocks taking into account visco-elasticity and plasticity are applied. Algorithms of numerical implementation of these models are constructed based on the method of two- cyclic splitting with respect to spatial variables and physical processes. Parallel software for multiprocessor computer systems of cluster architecture is developed. We applied this technology to the analysis of frequencies and amplitudes of waves generated in the near-surface soils, and showed that the source "Yenisei" possesses the required seismic parameters. Given contribution presents the results of computation of seismic efficiency of the electromagnetic pulse source as the ratio of the energy passing through the reflecting surface in the depth of layered massif to the energy of pulse effect on the surface. The applied method is based on the analysis of the Umov-Poynting vector field obtained by means of high-performance computations. The results show that, by the criterion of useful seismic energy, pulse sources are not inferior to sources of vibratory type. © 2019 Author(s).
Scopus,
Смотреть статью
Держатели документа:
Institute of Computational Modeling, SB RAS, 50/44 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Sadovskaya, O. V.; Sadovskii, V. M.
Аннотация: Computational technology is developed for numerical modeling of wave fields generated by the electromagnetic pulse source "Yenisei" in blocky-layered geological media. Mathematical models of soils and rocks taking into account visco-elasticity and plasticity are applied. Algorithms of numerical implementation of these models are constructed based on the method of two- cyclic splitting with respect to spatial variables and physical processes. Parallel software for multiprocessor computer systems of cluster architecture is developed. We applied this technology to the analysis of frequencies and amplitudes of waves generated in the near-surface soils, and showed that the source "Yenisei" possesses the required seismic parameters. Given contribution presents the results of computation of seismic efficiency of the electromagnetic pulse source as the ratio of the energy passing through the reflecting surface in the depth of layered massif to the energy of pulse effect on the surface. The applied method is based on the analysis of the Umov-Poynting vector field obtained by means of high-performance computations. The results show that, by the criterion of useful seismic energy, pulse sources are not inferior to sources of vibratory type. © 2019 Author(s).
Scopus,
Смотреть статью
Держатели документа:
Institute of Computational Modeling, SB RAS, 50/44 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Sadovskaya, O. V.; Sadovskii, V. M.