Optimization analysis of stiffness and natural frequency of unidirectional and randomly oriented short fiber-reinforced composite materials

IF 2.3 3区工程技术 Q2 MECHANICS

Acta Mechanica Pub Date : 2025-02-17 DOI:10.1007/s00707-025-04253-5

Emmanuel Chukwueloka Onyibo, Aysegul Gazioglu, Mohammad Abulibdeh, Osman Mohamed Osman, Turki Bin Huwail, Mohammed Alkhatib, Amr Aburemeis, Seyedalireza Razavi, Saeid Sahmani, Babak Safaei

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引用次数: 0

Abstract

In this study, numerical and analytical techniques including finite element analysis (FEA), rule of mixture (ROM), and Halpin–Tsai model were used to study the effects of the fiber volume fraction (FVF) on the vibrational responses of microscale unidirectional (UD) and random short fiber-reinforced (RSFR) finite element (FE)-modeled composite unit cells. It was found that as the FVF increases, so do the strength, resistance to deformation (stiffness), and natural frequency of the fiber-reinforced composite. However, such improvements have also shown to cause an increase in the overall mass of the composites, due to higher FVFs, and therefore, resulting in the exhibition of an early fiber–matrix debonding potential. The results of the simulation showed that the optimal dynamic stability was attained for a FVF of 0.3, and the maximum resistance to deformation with respect to stiffness-to-mass ratio was achieved for a FVF of 0.2. These results highlight the importance of selecting optimum FVFs for achieving the best balance between the desired performance (stiffness-to-mass) and mechanical properties of unidirectional fiber-reinforced composites (UD-FRC) and RSFR composites. Also, the harmonic loading capabilities of the hybrid composites having optimized FVFs were equally investigated.

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单向和随机取向短纤维增强复合材料刚度和固有频率的优化分析

本文采用有限元分析（FEA）、混合规则（ROM）和Halpin-Tsai模型等数值分析技术，研究了纤维体积分数（FVF）对微尺度单向（UD）和随机短纤维增强（RSFR）有限元模拟的复合材料单元胞的振动响应的影响。结果表明，随着FVF的增大，纤维增强复合材料的强度、抗变形能力（刚度）和固有频率也随之增大。然而，由于更高的FVFs，这种改进也显示出复合材料总体质量的增加，因此，导致纤维基质早期脱粘潜力的展示。仿真结果表明，当FVF为0.3时，获得了最佳的动态稳定性；当FVF为0.2时，获得了最大的刚度质量比变形阻力。这些结果强调了选择最佳FVFs对于实现单向纤维增强复合材料（UD-FRC）和RSFR复合材料所需性能（质量刚度比）和机械性能之间的最佳平衡的重要性。同时，对优化后的复合材料的谐波载荷性能进行了研究。

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

Acta Mechanica 物理-力学

CiteScore

4.30

自引率

14.80%

发文量

292

审稿时长

6.9 months

期刊介绍： Since 1965, the international journal Acta Mechanica has been among the leading journals in the field of theoretical and applied mechanics. In addition to the classical fields such as elasticity, plasticity, vibrations, rigid body dynamics, hydrodynamics, and gasdynamics, it also gives special attention to recently developed areas such as non-Newtonian fluid dynamics, micro/nano mechanics, smart materials and structures, and issues at the interface of mechanics and materials. The journal further publishes papers in such related fields as rheology, thermodynamics, and electromagnetic interactions with fluids and solids. In addition, articles in applied mathematics dealing with significant mechanics problems are also welcome.