Torsional postbuckling characteristics of functionally graded graphene enhanced laminated truncated conical shell with temperature dependent material properties

IF 3.2 3区工程技术 Q2 MECHANICS Theoretical and Applied Mechanics Letters Pub Date : 2023-07-01 DOI:10.1016/j.taml.2023.100453

Hamad M. Hasan , Saad S. Alkhfaji , Sattar A. Mutlag

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Abstract

Buckling and postbuckling characteristics of laminated graphene-enhanced composite (GEC) truncated conical shells exposed to torsion under temperature conditions using finite element method (FEM) simulation are presented in this study. In the thickness direction, the GEC layers of the conical shell are ordered in a piece-wise arrangement of functionally graded (FG) distribution, with each layer containing a variable volume fraction for graphene reinforcement. To calculate the properties of temperature-dependent material of GEC layers, the extended Halpin-Tsai micromechanical framework is used. The FEM model is verified via comparing the current results obtained with the theoretical estimates for homogeneous, laminated cylindrical, and conical shells, the FEM model is validated. The computational results show that a piece-wise FG graphene volume fraction distribution can improve the torque of critical buckling and torsional postbuckling strength. Also, the geometric parameters have a critical impact on the stability of the conical shell. However, a temperature rise can reduce the crucial torsional buckling torque as well as the GEC laminated truncated conical shell's postbuckling strength.

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具有温度相关材料特性的功能梯度石墨烯增强层合截锥壳的扭转后屈曲特性

采用有限元模拟方法研究了温度条件下受扭转作用的层压石墨烯增强复合材料(GEC)截锥形壳的屈曲和后屈曲特性。在厚度方向上，锥形壳的GEC层以功能梯度(FG)分布的片状排列有序，每层含有可变体积分数的石墨烯增强。为了计算GEC层温度相关材料的性质，采用扩展的Halpin-Tsai微力学框架。通过对均匀壳、层合圆柱壳和锥形壳的理论计算结果进行比较，验证了有限元模型的正确性。计算结果表明，片状FG石墨烯体积分数分布可以提高临界屈曲扭矩和扭转后屈曲强度。此外，几何参数对锥形壳的稳定性也有重要影响。然而，温度升高会降低临界扭转屈曲扭矩，降低GEC层压截断锥形壳的屈曲后强度。

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来源期刊

Theoretical and Applied Mechanics Letters MECHANICS-

CiteScore

6.20

自引率

2.90%

发文量

545

审稿时长

12 weeks

期刊介绍： An international journal devoted to rapid communications on novel and original research in the field of mechanics. TAML aims at publishing novel, cutting edge researches in theoretical, computational, and experimental mechanics. The journal provides fast publication of letter-sized articles and invited reviews within 3 months. We emphasize highlighting advances in science, engineering, and technology with originality and rapidity. Contributions include, but are not limited to, a variety of topics such as: • Aerospace and Aeronautical Engineering • Coastal and Ocean Engineering • Environment and Energy Engineering • Material and Structure Engineering • Biomedical Engineering • Mechanical and Transportation Engineering • Civil and Hydraulic Engineering Theoretical and Applied Mechanics Letters (TAML) was launched in 2011 and sponsored by Institute of Mechanics, Chinese Academy of Sciences (IMCAS) and The Chinese Society of Theoretical and Applied Mechanics (CSTAM). It is the official publication the Beijing International Center for Theoretical and Applied Mechanics (BICTAM).