Free vibration analysis of hybrid laminated thin-walled cylindrical shells containing multilayer FG-CNTRC plies

IF 2.3 3区工程技术 Q2 MECHANICS

Acta Mechanica Pub Date : 2024-10-18 DOI:10.1007/s00707-024-04082-y

Jiaocheng Ma, He Gao

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Abstract

In this paper, the free vibration analysis of hybrid laminated thin-walled cylindrical shells is investigated based on Sanders’s thin shell theory and artificial spring technology. The hybrid laminated shells are made of graphite fiber reinforced composite (GFRC) and multilayer functionally gradient carbon nanotube-reinforced composite (FG-CNTRC) plies. The influence of Coriolis and centrifugal forces on the shell's strain and kinetic energy, resulting from rotation, has been considered. The orthogonal polynomials are selected as the admissible function and the Rayleigh–Ritz method is employed to obtain the natural frequency. The results of the study are validated against the results of open literature. The influences of CNT distribution patterns, number of plies, stacking sequences, CNT volume fraction, boundary constraints(BCs), rotating speed, and the orientation angle on the natural frequency of the cylindrical shells. The results show that specific stacking configurations can significantly enhance the fundamental frequency of the shell. It provides a reference for the design and optimization of hybrid laminated cylindrical shell structures.

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包含多层 FG-CNTRC 层的混合层压薄壁圆柱壳的自由振动分析

本文基于桑德斯薄壳理论和人工弹簧技术，研究了混合层压薄壁圆柱壳的自由振动分析。混合层压壳由石墨纤维增强复合材料（GFRC）和多层功能梯度碳纳米管增强复合材料（FG-CNTRC）层压而成。研究考虑了科里奥利力和离心力对外壳应变和旋转动能的影响。选择正交多项式作为可接受函数，并采用 Rayleigh-Ritz 方法获得固有频率。研究结果与公开文献的结果进行了验证。研究了 CNT 分布模式、层数、堆叠顺序、CNT 体积分数、边界约束（BCs）、旋转速度和取向角对圆柱形壳体固有频率的影响。结果表明，特定的堆叠配置可以显著提高壳体的基频。它为混合层压圆柱壳结构的设计和优化提供了参考。

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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.