scholarly journals MODELING THE ELECTRONIC CHARACTERISTICS OF ELECTRICAL CERAMICS. PART. II

2021 ◽  
pp. 66-74
Author(s):  
V.V. Eremina ◽  
◽  
O.V. Zhilindina ◽  
E.A. Podolko ◽  
◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Composite Materials ◽  
Electronic Properties ◽  
Electronic Polarization ◽  
Frequency Spectra ◽  
Operational Frequency

The efficiency of mathematical modeling of the operational frequency spectra of composite materials caused by the processes of elastic electronic polarization is examined. The second part of the paper presents the results of modeling the electronic properties of pure oxides.

scholarly journals MODELING THE ELECTRONIC CHARACTERISTICS OF ELECTRICAL CERAMICS. PART III

2021 ◽  
pp. 67-74
Author(s):  
V.V. Eremina ◽  
◽  
O.V. Zhilindina ◽  
E.A. Podolko ◽  
◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Composite Materials ◽  
Electronic Properties ◽  
Electronic Polarization ◽  
Frequency Spectra ◽  
Operational Frequency

The efficiency of mathematical modeling of composite materials operational frequency spectra, caused by the processes of elastic electronic polarization is examined. The results of modeling the electronic properties of pure oxides are presented in the second part of the paper.

Mathematical Modeling and Experimental Investigations of a Main Rotor Made from Layered Composite Materials

2020 ◽  
Vol 56 (1) ◽  
pp. 103-110
Author(s):  
D. N. Solovyev ◽  
S. S. Dadunashvili ◽  
A. Mironov ◽  
P. Doronkin ◽  
D. Mironovs
Keyword(s):  
Mathematical Modeling ◽  
Composite Materials ◽  
Layered Composite ◽  
Experimental Investigations ◽  
Main Rotor

scholarly journals The Use of Mathematical Modelling Methods in the Creation of Composite Materials Based on Carbon Fibre Materials

2021 ◽  
Vol 1203 (2) ◽  
pp. 022093
Author(s):  
Valery Varentsov ◽  
Valentina Kuzina ◽  
Alexander Koshev ◽  
Valentina Varentsova
Keyword(s):  
Mathematical Modeling ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Solid Phase ◽  
Electrochemical Modification ◽  
Electrochemical Parameters ◽  
Solutions Of Electrolytes ◽  
The Creation ◽  
Fiber Materials ◽  
Electrodeposition Of Metals

Abstract The report provides data on the electrochemical modification of carbon-graphite fibers as the basis for the creation of composite materials. The results of studies of the electrodeposition of metals on pre-electrochemically modified carbon fiber materials (CFM) in order to obtain composite materials based on them are presented. The use of CFM for the creation of composite materials is associated with the possibility of deposition of metals, alloys or their compounds on the surface of their constituent fibers. Electrochemical treatment in aqueous solutions of electrolytes is a promising method for modifying the surface properties of carbon materials, including in order to improve their adhesive properties. Preliminary electrochemical modification of carbon fiber materials in indifferent solutions of electrolytes made it possible to obtain composite and nanocomposite materials with good adhesion of the electrodeposited metal to the surface of the fibers of carbon materials.When metals are deposited on carbon fiber materials, it is necessary to solve the problem of applying a uniform metal deposit or with a certain profile in the thickness of the material. In this case, it is effective to use methods of mathematical modeling of metal deposition processes in a flowing three-dimensional electrode. Depending on the selected modes of deposition of metal sediment on the CFM, some electrochemical parameters of the process and system may be dependent on both the time of the process and the thickness coordinate of the electrode. This is especially true for the value of the resistivity of the solid phase of the system, that is, carbon-graphite fibrous material. Other electrochemical parameters, such as the specific electrode surface, the exchange current and the transfer coefficient of the electrochemical reaction, the porosity of the material, etc., can also change during the electrodeposition of the metal on the CFM. It is proposed to take into account the change in the characteristic properties of modified carbon fiber materials in the mathematical modeling of the processes of electrodeposition of metals on carbon fiber materials in order to determine the technological parameters to improve the efficiency of the properties of composite materials. In order to implement mathematical models used in the calculation of electrochemical processes in the volume and on the surface of carbon fiber materials, a set of programs based on modern computational methods and programming languages has been developed.

scholarly journals Mathematical Modeling of Electrical Conductivity of Anisotropic Nanocomposite with Periodic Structure

Mathematics ◽  
2021 ◽  
Vol 9 (22) ◽  
pp. 2948
Author(s):  
Sergey Korchagin ◽  
Ekaterina Pleshakova ◽  
Irina Alexandrova ◽  
Vitaliy Dolgov ◽  
Elena Dogadina ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Electrical Conductivity ◽  
Dielectric Constant ◽  
Composite Materials ◽  
Optical Anisotropy ◽  
Nanocomposite Material ◽  
The Matrix ◽  
Self Similar ◽  
Anisotropic Form ◽  
Shape And Size

Composite materials consisting of a dielectric matrix with conductive inclusions are promising in the field of micro- and optoelectronics. The properties of a nanocomposite material are strongly influenced by the characteristics of the substances included in its composition, as well as the shape and size of inclusions and the orientation of particles in the matrix. The use of nanocomposite material has significantly expanded and covers various systems. The anisotropic form of inclusions is the main reason for the appearance of optical anisotropy. In this article, models and methods describing the electrical conductivity of a layered nanocomposite of a self-similar structure are proposed. The method of modeling the electrical conductivity of individual blocks, layers, and composite as a whole is carried out similarly to the method of determining the dielectric constant. The advantage of the method proposed in this paper is the removal of restrictions imposed on the theory of generalized conductivity associated with the need to set the dielectric constant.

Mathematical modeling of pyrolysis of semitransparent composite materials

1982 ◽  
Vol 18 (4) ◽  
pp. 455-461
Author(s):  
A. M. Grishin ◽  
S. P. Sinitsyn
Keyword(s):  
Mathematical Modeling ◽  
Composite Materials
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