Nonlinear static/transient behaviors of CNT-reinforced magnetoelectromechanical smart plates and shells considering agglomeration via a dual-director shell model

IF 2.1 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Mechanics of Time-Dependent Materials Pub Date : 2024-06-11 DOI:10.1007/s11043-024-09716-1

H. Mallek, H. Mellouli, R. Louhichi, F. Dammak

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Abstract

The application of piezomagnetic layers on the external surfaces of passive sandwich shells has the potential to create multifunctional smart sandwich structures. This work introduces new, smart magnetoelectroelastic (MEE) shells and studies their geometrically nonlinear bending and transient behavior as a first endeavor. A High-order Shear Deformation Theory (HSDT) is adopted to develop the Finite-Element model of the smart MEE shells considering the multiphysics couplings, meanwhile the Lagrangian nonlinear strain–displacement relations are employed to account for the geometric nonlinearity. The developed FE is modeled with nodal degrees of freedom that include displacements, rotations, and electric and magnetic potentials. Moreover, the physical characteristics of aggregated CNTRC are evaluated based on a micromechanics model incorporating the two agglomeration parameters. Different agglomeration schemas are considered for CNTs in the nanocomposite core layer. The precision and reliability of the current FE model are confirmed through a comparison of the existing results in the open literature. The study explores the influence of parameters such as CNT volume fraction and their agglomeration phenomena and various geometrical parameters of the shell on the nonlinear bending and dynamic behavior of smart MEE sandwich structures. The findings provide valuable insights into the subject.

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通过双向壳模型考虑集聚的 CNT 增强磁机电智能板和壳的非线性静态/瞬态行为

在被动夹层外壳的外表面应用压磁层有可能创造出多功能智能夹层结构。本研究首次引入了新型智能磁电弹性（MEE）壳体，并对其几何非线性弯曲和瞬态行为进行了研究。考虑到多物理耦合，采用高阶剪切变形理论（HSDT）来开发智能 MEE 外壳的有限元模型，同时采用拉格朗日非线性应变-位移关系来考虑几何非线性。所开发的 FE 模型具有节点自由度，包括位移、旋转、电势和磁势。此外，还根据包含两个团聚参数的微观力学模型对团聚 CNTRC 的物理特性进行了评估。针对纳米复合材料芯层中的 CNT，考虑了不同的聚结模式。通过对比公开文献中的现有结果，证实了当前 FE 模型的精确性和可靠性。研究探讨了 CNT 体积分数及其聚结现象等参数以及外壳的各种几何参数对智能 MEE 夹层结构的非线性弯曲和动态行为的影响。研究结果为该课题提供了宝贵的见解。

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来源期刊

Mechanics of Time-Dependent Materials 工程技术-材料科学：表征与测试

CiteScore

4.90

自引率

8.00%

发文量

审稿时长

>12 weeks

期刊介绍： Mechanics of Time-Dependent Materials accepts contributions dealing with the time-dependent mechanical properties of solid polymers, metals, ceramics, concrete, wood, or their composites. It is recognized that certain materials can be in the melt state as function of temperature and/or pressure. Contributions concerned with fundamental issues relating to processing and melt-to-solid transition behaviour are welcome, as are contributions addressing time-dependent failure and fracture phenomena. Manuscripts addressing environmental issues will be considered if they relate to time-dependent mechanical properties. The journal promotes the transfer of knowledge between various disciplines that deal with the properties of time-dependent solid materials but approach these from different angles. Among these disciplines are: Mechanical Engineering, Aerospace Engineering, Chemical Engineering, Rheology, Materials Science, Polymer Physics, Design, and others.