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Математическое моделирование диэлектрических свойств наноструктурированных композиционных материалов методом асимптотического осреднения

Математическое моделирование диэлектрических свойств наноструктурированных композиционных материалов методом асимптотического осреднения

Abstract

The paper presents a mathematical model for calculating effective dielectric properties of the composites modified by nanoinclusionson exposure to the external oscillating electrical field. The model is based on the asymptotic homogenizing method for differential equations of electrodynamics with rapidly oscillating coefficients. The local problem of electrodynamics on a composite periodicity cell is formulated. To solve the problem, the authors use the method of finite elements implemented in the SMCM software package developed in the Scientific Educational Center SIMPLEX at Bauman Moscow State Technical University. Both the CSIR storage schemes of discharged matrices and the method of biconjugate gradients are used. A settlement cycle of complex effective inductive capacity of a polymer composite with different carbon nanotube concentrations is performed. The authors consider the influence of nanotube cluster formations on generation of the nonmonotonous concentration dependence of the composite inductive capacity. The analysis of frequency dependence of dielectric loss tangent is carried out resulting in a good agreement with the experimental data

Предложена математическая модель для расчета эффективных диэлектрических свойств композиционных материалов, модифицированных нановключениями, при воздействии внешнего переменного электрического поля. Модель основана на методе асимптотического осреднения дифференциальных уравнений электродинамики с быстроосциллирующими коэффициентами. Сформулирована локальная задача электродинамики на ячейке периодичности композита, для ее решения применен метод конечных элементов, реализованный в рамках программного комплекса SMCM, разработанного в НОЦ “СИМПЛЕКС” МГТУ им. Н.Э. Баумана, с использованием CSIR-схемы хранения разряженных матриц и метода бисопряженных градиентов. Проведен цикл расчетов эффективной комплексной диэлектрической проницаемости полимерного композита с различными концентрациями углеродных нанотрубок. Теоретически обоснован эффект влияния кластерных образований нанотрубок на возникновение немонотонной концентрационной зависимости диэлектрической проницаемости композита. Проведен анализ частотной зависимости тангенса угла диэлектрических потерь, получено хорошее совпадение с экспериментальными данными

Keywords

НАНОСТРУКТУРИРОВАННЫЕ КОМПОЗИЦИОННЫЕ МАТЕРИАЛЫ,МЕТОД АСИМПТОТИЧЕСКОГО ОСРЕДНЕНИЯ,УГЛЕРОДНЫЕ НАНОТРУБКИ,ЭФФЕКТИВНАЯ ДИЭЛЕКТРИЧЕСКАЯ ПРОНИЦАЕМОСТЬ,МЕТОД КОНЕЧНЫХ ЭЛЕМЕНТОВ,NANOSTRUCTURAL COMPOSITES,ASYMPTOTIC HOMOGENIZING METHOD,CARBON NANOTUBES,EFFECTIVE INDUCTIVE CAPACITY,METHOD OF FINITE ELEMENTS

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze