Research on the Elastic-Plastic Behaviors of Bicontinuous Polymer Matrix and Carbon Fiber-Reinforced Composites Based on Micromechanical Modelling.

IF 4.9 3区工程技术 Q1 POLYMER SCIENCE

Polymers Pub Date : 2025-09-17 DOI:10.3390/polym17182517

Bin Yao, Liang Ren, Guocheng Qi, Yukun Zhao, Zhen Xu, Long Chen, Dongmei Wang, Rui Zhang

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引用次数: 0

Abstract

Due to the potential to integrate structural load bearing and energy storage within one single composite structural component, the development of carbon fiber (CF)-based structural power composites (SPCs) has garnered significant attention in electric aircraft, electric vehicles, etc. Building upon our previous investigation of the electrochemical performance of SPCs, this work focuses on elastic-plastic behaviors of the bicontinuous structural electrolyte matrices (BSEMs) and carbon fiber composite electrodes (CFCEs) in SPCs. Representative volume element (RVE) models of the BSEMs were numerically generated based on the Cahn-Hilliard equation. Furthermore, RVE models of the CFCEs were established, consisting of the BSEM and randomly distributed CFs. The moduli of BSEMs and the transverse moduli of CFCEs with different functional pore phase volume fractions were predicted and validated against experimental results. Additionally, the local plasticity of BSEMs and CFCEs in the tensile process was analyzed. The work indicates that the presence of the bicontinuous structure prolongs the plasticity evolution process, compared with the traditional polymer matrix, which could be used to explain the brittle-ductile transition observed in the matrix-dominated load-bearing process of CFCEs in the previous literature. This work is a step forward in the comprehensive interpretation of the elastic-plastic behaviors of bicontinuous matrices and multifunctional SPCs for realistic engineering applications.

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基于细观力学建模的双连续聚合物基-碳纤维增强复合材料弹塑性行为研究。

由于碳纤维（CF）基结构动力复合材料（spc）具有在单一复合材料结构部件中集成结构承载和能量存储的潜力，因此其在电动飞机、电动汽车等领域的发展受到了广泛关注。在我们之前对SPCs电化学性能研究的基础上，本研究重点研究了SPCs中双连续结构电解质基质（BSEMs）和碳纤维复合电极（cfce）的弹塑性行为。基于Cahn-Hilliard方程，数值生成了具有代表性的bsem体积元模型。建立了由BSEM和随机分布cfcs组成的cfcs RVE模型。预测了不同功能孔相体积分数下bsem的模量和cfce的横向模量，并与实验结果进行了对比验证。此外，还分析了BSEMs和cfce在拉伸过程中的局部塑性。研究表明，与传统聚合物基体相比，双连续结构的存在延长了塑性演化过程，这可以用来解释以往文献中在基体主导的cfce承载过程中观察到的脆性-韧性转变。这项工作是在实际工程应用中对双连续矩阵和多功能SPCs的弹塑性行为进行综合解释的一步。

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来源期刊

Polymers POLYMER SCIENCE-

CiteScore

8.00

自引率

16.00%

发文量

4697

审稿时长

1.3 months

期刊介绍： Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.