Influence of flexoelectric effect on the bending rigidity of a Timoshenko graphene-reinforced nanorod

IF 1.7 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of the Mechanical Behavior of Materials Pub Date : 2023-01-01 DOI:10.1515/jmbm-2022-0295

S. Nevhal, M. Gupta, S. I. Kundalwal

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Abstract

Abstract The focus of this work is to study the influence of flexoelectric phenomenon on the electromechanical response of graphene-reinforced nanocomposite (GNC) nanorods. An analytical model has been derived by utilizing the Timoshenko beam theory and the principle of variational work by incorporating flexoelectric effects. The GNC nanorod is subjected to a concentrated load acting downward for clamped-free and simply supported support types. The GNC is reinforced with a defective graphene sheet as it is known to show enhanced polarization. The elastic properties of defective graphene sheets have been evaluated using molecular dynamic simulations. The outcome of our model shows that the flexoelectric effect must be considered for accurate modeling of nanostructures. Irrespective of the support type, flexoelectric effect improves the stiffness of the nanorod. We also observed that the stiffness of the nanorod is significantly influenced by the support type. This work presents an opportunity for the development of high-performance graphene-based nanoactuators/sensors.

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挠曲电效应对Timoshenko石墨烯增强纳米棒弯曲刚度的影响

摘要本研究的重点是研究挠曲电现象对石墨烯增强纳米复合材料(GNC)纳米棒机电响应的影响。利用铁木辛柯梁理论和变分功原理，结合挠性电效应，推导了一个解析模型。GNC纳米棒承受的集中载荷向下作用于无夹紧和简支支撑类型。GNC是用有缺陷的石墨烯片增强的，因为它显示出增强的极化。利用分子动力学模拟对缺陷石墨烯片的弹性性能进行了评价。我们的模型结果表明，为了精确地模拟纳米结构，必须考虑挠曲电效应。无论采用何种支撑方式，柔性电效应都能提高纳米棒的刚度。我们还观察到纳米棒的刚度受到支撑类型的显著影响。这项工作为高性能石墨烯基纳米致动器/传感器的发展提供了机会。

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来源期刊

Journal of the Mechanical Behavior of Materials Materials Science-Materials Science (miscellaneous)

CiteScore

3.00

自引率

11.10%

发文量

审稿时长

30 weeks

期刊介绍： The journal focuses on the micromechanics and nanomechanics of materials, the relationship between structure and mechanical properties, material instabilities and fracture, as well as size effects and length/time scale transitions. Articles on cutting edge theory, simulations and experiments – used as tools for revealing novel material properties and designing new devices for structural, thermo-chemo-mechanical, and opto-electro-mechanical applications – are encouraged. Synthesis/processing and related traditional mechanics/materials science themes are not within the scope of JMBM. The Editorial Board also organizes topical issues on emerging areas by invitation. Topics Metals and Alloys Ceramics and Glasses Soils and Geomaterials Concrete and Cementitious Materials Polymers and Composites Wood and Paper Elastomers and Biomaterials Liquid Crystals and Suspensions Electromagnetic and Optoelectronic Materials High-energy Density Storage Materials Monument Restoration and Cultural Heritage Preservation Materials Nanomaterials Complex and Emerging Materials.