Mechanical-thermal coupling of carbon fiber/aluminum/silicone foams under axial loading

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-03-28 DOI:10.1016/j.ijmecsci.2025.110201

Han Du , Panpan Weng , Chao Fang , Juanjuan Zhang , George J. Weng

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Abstract

Mechanical-thermal coupling mechanisms in silicone foam (SF) composites play a crucial role in optimizing their performance for aerospace, automotive, and construction applications, where lightweight design and thermal efficiency are essential. This study presents a comprehensive theoretical framework to evaluate the mechanical and thermal properties of SF composites reinforced by carbon fibers (CF) and aluminum particles (Al) under axial pressure. A four-phase composite model is developed to incorporate inclusions, matrix and voids, accounting for morphological changes in the foam structure. The model employs the Mori-Tanaka method to predict the elastoplastic behaviors, while effective-medium approximation is used to determine thermal conductivity. The framework also considers interfacial effects, including interfacial sliding, the Kapitza resistance, and filler-filler contact. Comparisons with experimental data validate the model and reveal that CF/Al/SF composites exhibit superior thermal and mechanical properties, with CFs demonstrating a more pronounced impact. These findings underscore the interplay between mechanical loading, void morphology, and thermal performance, highlighting the importance of tailoring CF/Al ratios and processing conditions to achieve synergistic mechanical-thermal properties of SF-based composites.

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轴向载荷下碳纤维/铝/泡沫硅的机热耦合

有机硅泡沫（SF）复合材料的机械-热耦合机制在优化航空航天、汽车和建筑应用的性能方面发挥着至关重要的作用，这些应用的轻量化设计和热效率至关重要。本研究提出了一个综合的理论框架来评估碳纤维（CF）和铝颗粒（Al）增强的SF复合材料在轴向压力下的力学和热性能。建立了包含夹杂物、基体和空隙的四相复合模型，考虑了泡沫结构的形态变化。该模型采用Mori-Tanaka方法来预测弹塑性行为，而有效介质近似用于确定热导率。该框架还考虑了界面效应，包括界面滑动、Kapitza阻力和填料-填料接触。与实验数据的对比验证了模型的有效性，并表明CF/Al/SF复合材料具有优异的热性能和力学性能，其中CF的影响更为明显。这些发现强调了机械载荷、空洞形态和热性能之间的相互作用，强调了调整CF/Al比和加工条件以实现sf基复合材料的协同机械热性能的重要性。

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.