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Numerical simulation of superplastic bulge forming test
Journal of Physics: Conference Series. 2021. Vol. 1740. P. 1-6.
Superplastic blow forming is a technology of shell parts production. The development of these processes requires computer simulation which cannot be realized without accurate parameters of the applied material. This characterization can be based on results of free bulging tests. Characterization techniques utilize the models of the dome growth during the bulging test. This study is devoted to the assessing of friction coefficient effect on the linear behavior of normalized thickness - normalized height relation.
Language:
English
Zakhariev I., Procedia Manufacturing 2019 Vol. 37 P. 85-90
Superplastic Forming is an industrial process to produce thin-walled products of complex shape. At the same time this process allows one to obtain the products with close to uniform thickness distribution. The process exploits the abilities of some polycrystalline materials to large elongations before failure. The best formability can be achieved only under very specific ...
Added: February 4, 2020
Aksenov S. A., Chumachenko E. N., Osipov S. et al., Procedia Engineering 2014 Vol. 81 P. 1017-1022
This study proposes a method for determining the material constitutive equations and optimal forming conditions on the basis of free bulging tests. The blow-forming tests were carried out at the temperature of 420 °C using aluminum alloy (AMg-6) sheets of a 1 mm thickness. Each test was performed at constant pressure. For each fixed value ...
Added: October 16, 2014
Zlotnik Alexander, / Cornell University. Series math "arxiv.org". 2015.
We deal with an initial-boundary value problem for the generalized time-dependent Schr\"odinger equation with variable coefficients in an unbounded $n$--dimensional parallelepiped ($n\geq 1$). To solve it, the Crank-Nicolson in time and the polylinear finite element in space method with the discrete transpa\-rent boundary conditions is considered. We present its stability properties and derive new error ...
Added: March 27, 2015
L. : CRC Press, 2018
Innovation-Based Development of the Mineral Resources Sector: Challenges and Prospects contains the contributions presented at the XI Russian-German Raw Materials Conference (Potsdam, Germany, 7-8 November 2018). The Russian-German Raw Materials Conference is held within the framework of the “Permanent Russian-German Forum on the Issues of the Use of Raw Materials”, which has as goals to develop ...
Added: March 16, 2019
Zlotnik A.A., Zlotnik I. A., Доклады Академии наук 2012 Vol. 86 No. 3 P. 750-755
We consider the time-dependent 1D Schrödinger equation on the half-axis with variable coefficients becoming constant for large x. We study a two-level symmetric in time (i.e. the Crank-Nicolson) and any order finite element in space numerical method to solve it. The method is coupled to an approximate transparent boundary condition (TBC). We prove uniform in ...
Added: October 4, 2012
M. : Association of graduates and employees of AFEA named after prof. Zhukovsky, 2018
The materials of The International Scientific – Practical Conference is presented below.
The Conference reflects the modern state of innovation in education, science, industry and social-economic sphere, from the standpoint of introducing new information technologies.
It is interesting for a wide range of researchers, teachers, graduate students and professionals in the field of innovation and information technologies. ...
Added: May 24, 2018
Zakhariev I., Aksenov S. A., Journal of Chemical Technology and Metallurgy 2017 Vol. 52 No. 5 P. 1002-1007
Free bulging process is an experimental technique which can be used to characterize a sheet material in conditions of biaxial tension during hot forming. Analytical and semi-analytical models of this process are usually based on the hypothesis offering certain relations between the geometrical characteristics of a bulge during forming. The paper presents an original relation ...
Added: December 11, 2016
Lychkina N. N., М. : ИНФРА-М, 2011
В настоящем издании приведено изложение основного теоретического материала по дисциплине «Имитационное моделирование экономических процессов», в рамках которой осваиваются метод и технология имитационного моделирования. В пособии описаны базовые концепции структуризации моделируемых сложных систем: процессно-ориентированный подход, сетевые парадигмы, агрегаты, применяемые для целей дискретного имитационного моделирования, а также модели и методы системной динамики, многоагентное компьютерное моделирование. Для целей ...
Added: October 27, 2014
Болнокин В. Е., Ivashov E., Князева М. П. et al., Вестник машиностроения, СТИН 2014 № 8 С. 35-39
Examined method formation of model's elements description makes possible to solve the problem of construction hierarchy of model's automatic perfomance in this application domain. System concept based on serial transition from the general to the particular, various gain size models is used the each phase is considered. ...
Added: September 23, 2014
Marshirov V. V., Marshirova L. E., Марширов И. В., Литейное производство 2019 № 9 С. 34-38
An information environment is presented for managing and researching technological processes in the foundry industry, including process control functions and a control system interface with the ability to visualize data in graphical form. ...
Added: October 29, 2019
М. : Издательство АСВ, 2015
The volume contains articles of scientific staff and faculty of the Department of Computer Science and Applied Mathematics and Scientific-Educational Center of computer modeling of unique buildings and complexes of Moscow State University of Civil Engineering (National Research University), devoted to actual problems of applied mathematics and computational mechanics. ...
Added: September 4, 2014
Trautmann P., Vexler B., Zlotnik A., Mathematical Control and Related Fields 2018 Vol. 8 No. 2 P. 411-449
This work is concerned with the optimal control problems governed by the 1D wave equation with variable coefficients and the control spaces $\mathcal M_T$ of either measure-valued functions $L^2(I,\mathcal M(\Omega))$ or vector measures $\mathcal M(\Omega,L^2(I))$. The cost functional involves the standard quadratic terms and the regularization term $\alpha\|u\|_{\mathcal M_T}$, $\alpha>0$. We construct and study three-level ...
Added: April 8, 2017
Zlotnik Alexander, Zlotnik Ilya, Computational Methods in Applied Mathematics 2015 Vol. 15 No. 2 P. 233-245
We consider the Cauchy problem for the 1D generalized Schrὅdinger equation on the whole axis. To solve it, any order finite element in space and the Crank-Nicolson in time method with the discrete transpa\-rent boundary conditions (TBCs) has recently been constructed. Now we engage the global Richardson extrapolation in time to derive the high order ...
Added: March 3, 2015
Koldanov P., Вестник Тверского государственного университета. Серия: Прикладная математика 2018 № 4 С. 23-30
Одной из мер связи между случайными величинами является вероятность совпадения знаков их центрированных аналогов. В [4] показано, что в классе эллиптических распределений при известном параметре сдвига такая вероятность не зависит от образующей функции. В настоящей работе доказано, что вероятность совпадения знаков случайных величин, центрированных относительно их выборочного среднего, также не зависит от образующей функции при ...
Added: January 21, 2019
M. : HSE, 2014
The materials of The Third International Scientific-Practical Conference is presented below. The Conference reflects the modern state of innovation in education, science, industry and social-economic sphere, from the standpoint of introducing new information technologies.
Digest of Conference materials is presented in 3 parts. It is interesting for a wide range of researchers, teachers, graduate students and ...
Added: April 18, 2014
Пенза : ПГУ, 2016
В сборник трудов включены доклады ХХI-го Международного симпозиума «Надежность и качество», проходившего с 23 по 29 мая 2016 г. в городе Пензе.
Рассмотрены актуальные проблемы теории и практики повышения надежности и качества; эффективности внедрения инновационных и информационных технологий в фундаментальных научных и прикладных исследованиях, образовательных и коммуникативных системах и средах, экономике и юриспруденции; методов и средств ...
Added: May 27, 2016
Trubochkina N. K., Лиховцева А. В., Кондратьев Н. В., М. : ВГИК, 2015
The collection contains materials, reports and presentations at the II International scientific-practical conference "Innovative technologies in cinema and education", held 21-25 September 2015 in Moscow at the Russian State Institute of Cinematography named after SA Gerasimov. For cameramen, of Cinema, the film industry education teachers as well as students and other professionals. ...
Added: March 7, 2016
Kazan : -, 2013
The issue contains the papers presented at the 7th Spring/Summer Young Researchers' Соllоquium оn Software Engineering (SYRCoSE 2013) held in Kazan, Russia on 30th and З1st оf Мay, 2013. Paper selection was based on a competitive peer review process being done by the program committee. Both regular and reseаrсh-in-рrogrеss papers were соnsidered ассeрtable for the ...
Added: June 8, 2013
Baranov A., Baranov P., Проблемы информационной безопасности. Компьютерные системы 2018 № 4 С. 62-67
The paper examines probability-theoretic models of information distortion at message level. We research control sum distribution segments that are typical for network protocols like TCP.
As an addition operation we use both bitwise coordinate addition and addition of numbers in binary code with carry. Control sum error probability for asymptotic assessments provided distortion probability is low ...
Added: July 31, 2019
Lychkina N. N., Глазков Д. Н., Хоружевская А. П., Логистика и управление цепями поставок 2014 Т. 05 № 64 С. 57-63
В статье демонстрируется применение метода имитационного моделирования в среде AnyLogic в целях оптимизации логистической сети промышленной компании, работающей на рынке промышленных газов. В модели детализированы основные процессы, связанные с транпортировкой продукта, обслуживанием заявок клиентов и распределением продукта потребителям. Были учтены факторы, носящие стохастический характер, такие как неритмичность производства, погодные условия, влияющие на уровень спроса, количество ...
Added: November 30, 2014
Poddiakov A., Integrative Psychological and Behavioral Science 2019 Vol. 53 No. 2 P. 199-206
In the commentary to Jens Mammen’s book A New Logical Foundation for Psychology (2017), three issues are discussed. The first one concerns possible interrelations of: (a) others’ irreplaceability and existential irretrievability rigorously proved by Mammen; and (b) morality and attitudes to the others. Lem’s criticism of Heidegger’s existential philosophy, which paradoxically ignores mass homicide, is ...
Added: November 27, 2018
М. : Отделение подготовки и выпуска официальной информации Федерального государственного бюджетного учреждения «Федеральный институт промышленной собственности» (ФИПС), 2019
Официальный бюллетень «Программы для ЭВМ. Базы данных. Топологии интегральных микросхем» содержит: сведения о государственной регистрации программы для ЭВМ; сведения о государственной регистрации базы данных; сведения о государственной регистрации топологии интегральной микросхемы, сведения об изменениях, относящихся к государственной регистрации программ для ЭВМ, баз данных и топологий интегральных микросхем. Бюллетень может содержать разделы «Официальные сообщения» и «Судебные решения о нарушении прав ...
Added: June 15, 2019