A physics-based nonlocal theory for particle-reinforced polymer composites

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2024-11-07 DOI:10.1016/j.ijmecsci.2024.109800

Ruizhi Li, Li Li, Yiyuan Jiang

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引用次数: 0

Abstract

How the nonlocal interaction effects of particle-reinforced polymer composites manifest themselves from their underlying microstructure is not fully understood, thus greatly limiting the ability to model their mechanical properties. This paper explores the nonlocal interaction mechanisms of particle-reinforced polymer composites and unveils that both the nonlocal interaction effects between particles and the nonlocal effects of natural discrete polymer chains play an important role in particle-reinforced polymer composites. Then, a physics-based nonlocal continuum theory capable of capturing these two complex nonlocal effects is proposed based on the Eshelby equivalent inclusion method, the Mori–Tanaka model, and the interpenetrating network model. The proposed physics-based nonlocal continuum theory provides a rigorous methodology for developing physically consistent nonlocal homogenization models of particle-reinforced polymer composites and their composite structures. The results show that the two nonlocal effects play a role in stiffness softening in the mechanical behavior of particle-reinforced polymer composites, and the nonlocal mechanical behavior predicted by the developed nonlocal homogenization model is highly consistent with the existing experimental data.

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基于物理学的颗粒增强聚合物复合材料非局部理论

颗粒增强聚合物复合材料的非局部相互作用效应如何从其基本微观结构中体现出来，目前还没有完全搞清楚，因此极大地限制了对其力学性能进行建模的能力。本文探讨了颗粒增强聚合物复合材料的非局部相互作用机理，揭示了颗粒之间的非局部相互作用效应和天然离散聚合物链的非局部效应在颗粒增强聚合物复合材料中发挥着重要作用。然后，基于 Eshelby 等效包含法、Mori-Tanaka 模型和互穿网络模型，提出了能够捕捉这两种复杂非局部效应的基于物理的非局部连续理论。所提出的基于物理的非局部连续理论为开发颗粒增强聚合物复合材料及其复合结构的物理一致的非局部均质化模型提供了严格的方法。结果表明，这两种非局部效应在颗粒增强聚合物复合材料力学行为的刚度软化中起作用，而且所建立的非局部均质化模型预测的非局部力学行为与现有实验数据高度一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.