Modeling of the localy-functional properties of the material damaged by fields of defects

Ломакин, Е. В.; Lurie, S. A.; Belov, P. A.; Rabinskii, L. N.

doi:10.1134/s1028335817010128

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…8 of Regulation 714/2009). Besides, the important element of supply security is the mechanism of calculation of cross-border flows of electricity and tariffs for authorisation to networks, one of the principles of which is provision of investment in development of supply and network security in general [37][38][39][40][41][42][43][44][45][46][47][48]. Also, the mechanism of compensation between transmission system operators for costs incurred as a result of hosting cross-border flows of electricity on their networks (art.…”

Section: Resultsmentioning

confidence: 99%

International regulation of the restriction of the use of environment

Kapitonov

2019

PEN

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Agreements in the field of energy involve possibilities to lower consumption of natural resources and increase in production of renewable sources of energy. However, such interactions between goals and average requirements of an energy complex can be successful only when concluding similar international agreements. As the relevance of the study is energy sector of developed countries, which strives for balance of sources of electricity. Novelty of the study is determined by the fact that for the first time agreements in the field of environmental conservation are considered as a reasonable compromise between the necessity to expand the number of applicable technologies and requirement to lower overall consumption. In this regard, the authors consider as the research object the European Union as the most harmonic combination of ecological requirements to the use of energy and general desire to compensate ecological damage. In the article, the legal framework of the agreement on energy regulation in block formation has been analysed using the example of the European Union. Practical application of the study is determined by that forming of coherent energy agreement depends on not only efforts of separate states, but also on the extent to which these conditions will be combined with economic policies and the quality content of energy conservation policies.

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Section: Resultsmentioning

confidence: 99%

International regulation of the restriction of the use of environment

Kapitonov

2019

PEN

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“…Conditions of this experiment are similar to the conditions of the experiment, which was performed in (Alkhimov et al, 2000). The single exception is as follows: in this case, calculations were performed for the conical nozzle (Lomakin et al, 2017;Formalev et al, 2018;Formalev and Kolesnik, 2019).…”

Section: Resultsmentioning

confidence: 99%

Formation of the Supersonic Heterogeneous Streams in the Gasdynamic Accelerators With Great Elongation

Никитин¹,

Rabinskiy²,

Tushavina³

2019

PTQ

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The present article describes results of the experimental and theoretical investigation of gas dynamics and heat exchange in the course of a supersonic flow of the gas-powder mixture within the axially symmetric gas-dynamic accelerators, which have small critical cross-sections (dcritical from 1 to 3 mm) and substantial elongation (L/dcritical from 70 to 200). The necessity of performance of such investigations was determined by two aspects. The first is the development of the innovative technologies with the purpose of formation of the heat-resistant coatings and other coatings with various functions and necessary properties (formation of such coatings with the help of supersonic heterogeneous streams). The second is the creation of the supersonic heterogeneous streams, which are required for the development of experimental investigations of processes of the erosive and corrosive wear of structural components of the high-speed air vehicles, which conduct flights in atmospheric anomalies (rain clouded sky and dust-in-air conditions). This study describes the entire cycle of the experimental investigations, which were performed with the purpose of construction of the more reliable mathematical model of flow of the nonisentropic heterogeneous streams in the gas-dynamic accelerators with great elongation. The viscous gas flow parameters were calculated using the classical model of a flat boundary layer. The value of the characteristics of the carrier gas flow, the dispersion of particles and their material for accelerating particles in a heterogeneous flow were found out. The study showed that the design of gasdynamic micro accelerators must be carried out taking into account the increase in the thickness of the boundary layer along the walls of the particle accelerator. In addition, this article presents a more detailed description of gas dynamics of flow and heat exchange of the heterogeneous mixtures within supersonic gasdynamic accelerators with mass concentration of the powder particles ("К-phase") in the stream up to 15%.

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“…it is a functionally-graded material. In order to consider such a "graded" nature, we take into account the correspondence between the solutions of nonlocal theories of elasticity and the solutions of classical elasticity for materials with functionallygraded properties [23,24]. We use, for this purpose, a gradient model for the interphase layer, G in the transverse direction.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Moreover, application of the gradient model for interphase layer allows to compute the effective properties of the whole composite, which now depend, among other things, on an extra gradient or internal length parameter, thus providing another source for the appearance of size effects. Such a combination of the Eshelby methodology with Aifantis GradEla model was outlined in [21] and more recently utilized [23][24][25] to model locallyfunctional gradient properties and multilayered spherical inclusions. The properties of the fundamental solutions of the GradEla model (see references listed in [22]) are also taken into account.…”

Section: Introductionmentioning

confidence: 99%

Modeling the effective mechanical properties of “fuzzy fiber” composites across scales length

Lurie

Volkov-Bogorodskiy

Menshykov

et al. 2018

Composites Part B: Engineering

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We employ a variant of generalized Eshelby's homogenization method to deduce effective properties of multilayered nanostructured fiber composites where one layer is highly heterogeneous with respect to its mechanical response strain gradients. We focus on carbon (C) fibers coated by carbon nanotubes (CNT) embedded in polymeric matrix with the aid of CNT "blistered" interphase layer developed between the coating and the matrix during processing and/or use. Each of the three phases is treated for simplicity by classical elasticity, while the interphase layer around the coated fibers ("fuzzy fibers") to provide adhesion, and is treated by the simple gradient elasticity (GradELa) model. The novelty of the work lies on the fact of treating the CNT "fuzzy" layer by the GradEla model, that consequently allows to consider the extra gradient coefficient or internal length (characterizing this model) in relation to other constitutive and geometric parameters of the composite to optimize its overall mechanical properties and functionality. The method is general and can apply to treat other types of "fuzzy fiber" composites.

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Modeling of the localy-functional properties of the material damaged by fields of defects

Cited by 7 publications

References 11 publications

International regulation of the restriction of the use of environment

International regulation of the restriction of the use of environment

Formation of the Supersonic Heterogeneous Streams in the Gasdynamic Accelerators With Great Elongation

Modeling the effective mechanical properties of “fuzzy fiber” composites across scales length

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