玻璃和大麻混合环氧树脂/MWCNT混合蜂窝芯夹层圆柱壳的力学特性、振动和屈曲分析

IF 2 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Banghua Xie, Xuefeng Song, Wenjun Chen, Kai Wu, Ananda Babu Arumugam, Mesfin Kebede Kassa
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引用次数: 0

摘要

本研究研究了一种新型多功能蜂窝核心复合材料的开发和表征,该复合材料由多壁碳纳米管(MWCNT)增强大麻-玻璃混合环氧树脂组成,用于高级结构应用。研究采用动态力学分析(DMA)、解析建模、基于高阶剪切变形理论的有限元分析和实验验证等方法对材料性能和结构性能进行评估。动态力学分析表明,2% MWCNT试样在40-50°C时表现出优异的拉伸模量,而1% MWCNT试样在65°C以上表现更好。系统表征了mwcnt填充试样(0%、1%和2%重量分数)的横向剪切特性,揭示了储存剪切模量从105-135 MPa (Gxz方向)到100- 125 MPa (Gyz方向)。对gfrp包覆夹层圆柱壳的有限元建模表明,由于横向剪切刚度的增强,MWCNT重量分数增加了固有频率,而壳体曲率的减小也通过被动刚度的贡献提高了频率。温度效应显示,在60°C以上,由于粘弹性行为,固有频率下降,尽管MWCNT掺入通过保持环氧树脂粘度显著地保持了热稳定性。模态阻尼特性在60°C以上增加,反映了MWCNT增强后的粘弹性行为。临界屈曲载荷分析表明,随着MWCNT含量的增加,临界屈曲载荷逐渐提高,其中2%的MWCNT试样在60°C时表现出最大的屈曲抗力。研究表明,在不同的壳曲率和温度之间,固有频率和模态损失因子存在显著差异,特别是在夹紧边界条件下。可持续大麻纤维与高性能玻璃纤维和MWCNT增强的成功整合为环保复合材料提供了一条有希望的途径,同时又不影响结构性能,为设计师提供了风力涡轮机部件、航空航天结构、直升机叶片、汽车零部件和先进运动设备的灵活解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mechanical characterization, vibration, and buckling analyses of Glass & Hemp blended epoxy/MWCNT hybrid honeycomb core sandwich cylindrical shells

This study investigates the development and characterization of a novel multifunctional honeycomb core composite comprising multi-walled carbon nanotube (MWCNT)-reinforced Hemp-Glass blended epoxy for advanced structural applications. The research employs dynamic mechanical analysis (DMA), analytical modeling, FEM using higher-order shear deformation theory, and experimental validation to evaluate material properties and structural performance. Dynamic mechanical analysis demonstrated that 2% MWCNT specimens exhibited superior extension modulus at 40–50 °C, while 1% MWCNT specimens performed better above 65 °C. The transverse shear properties of MWCNT-filled specimens (0%, 1%, and 2% weight fractions) were systematically characterized, revealing storage shear moduli ranging from 105–135 MPa (Gxz direction) to 100-–125 MPa (Gyz direction). Finite element modeling of GFRP-skinned sandwich cylindrical shells revealed that the natural frequencies increased with MWCNT weight fraction due to enhanced transverse shear stiffness, while decreased shell curvature also improved frequencies through passive stiffness contributions. Temperature effects showed natural frequencies declining above 60 °C due to viscoelastic behavior, though MWCNT incorporation significantly preserved thermal stability by maintaining epoxy resin viscosity. Modal damping characteristics increased above 60 °C, reflecting enhanced viscoelastic behavior with MWCNT reinforcement. The critical buckling load analysis demonstrated progressive improvement with increasing MWCNT content, with 2% MWCNT specimens showing maximum buckling resistance up to 60 °C. The study revealed significant differences in natural frequencies and modal loss factors between various shell curvatures and temperatures, particularly under clamped boundary conditions. The successful integration of sustainable hemp fibers with high-performance glass fibers and MWCNT reinforcement presents a promising pathway for environmentally conscious composite materials without compromising structural performance, offering designers flexible solutions for wind turbine components, aerospace structures, helicopter blades, automotive parts, and advanced sporting equipment.

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来源期刊
CiteScore
8.60
自引率
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1
审稿时长
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