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Многоуровневый подход к исследованию влияния объемного соотношения компонентов волокнистого однонаправленного углепластика на его механические характеристики

Многоуровневый подход к исследованию влияния объемного соотношения компонентов волокнистого однонаправленного углепластика на его механические характеристики

Abstract

The Multilevel approach to studying the influence of the volumetric ratio in components of unidirectional carbon fiber composite on its mechanical properties. The problem of predicting effective mechanical properties of composite materials is considered. This problem is solved on the basis of the multilevel approach to the description of the material structure. For every level of the composite structure, the influence of damage accumulation on the formation of mechanical properties of the material is considered. The possibility of a detailed investigation of the influence of microand mesoscopic level effects on the formation of effective mechanical properties of the composites is shown. The proposed numerical procedure is used for the estimation of effective properties of model composites with volume ratios of carbon fiber ranging from 7% to 50%. The task of estimating local properties of materials is solved by the finite elements method. The ultimate values of strength and strain of the composite are determined as a result of studying the evolution of clusters of damages in representative volumes of the material. It is shown that these values grow nonmonotonically with an increase in the volume ratio of reinforcements. The results obtained have a good compliance with known experimental data.

Рассматривается проблема прогнозирования эффективных механических свойств композиционных материалов. Задача решается с использованием многоуровневого подхода к описанию структуры материала. На каждом структурном уровне композита рассматривается влияние процесса накопления повреждений на формирование его механических свойств. На примере модельных углепластиков с объемным содержанием углеродных волокон от 7 до 50 % показана возможность исследования в рамках предложенной вычислительной методики влияния эффектов микрои мезомасштабного уровня на формирование эффективных механических свойств композитов.

Keywords

КОМПОЗИЦИОННЫЕ МАТЕРИАЛЫ, МЕХАНИЧЕСКОЕ ПОВЕДЕНИЕ, ЭФФЕКТИВНЫЕ МЕХАНИЧЕСКИЕ СВОЙСТВА, НАКОПЛЕНИЕ ПОВРЕЖДЕНИЙ, ПРОЧНОСТЬ, РАЗРУШЕНИЕ, ЧИСЛЕННОЕ МОДЕЛИРОВАНИЕ, МЕТОД КОНЕЧНЫХ ЭЛЕМЕНТОВ, МНОГОУРОВНЕВЫЙ ПОДХОД

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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
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