Static analysis of piezoelectric functionally graded porous plates reinforced by graphene platelets

N. Lieu, N. Hung
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引用次数: 3

Abstract

In this study, for the first time an isogeometric finite element formulation for bending analysis of functionally graded porous (FGP) plates reinforced by graphene platelets (GPLs) embedded in piezoelectric layers is presented. It is named as PFGP-GPLs for a short. The plates are constituted by a core layer, which contains the internal pores and GPLs dispersed in the metal matrix either uniformly or non-uniformly according to three different patterns, and two piezoelectric layers perfectly bonded on the top and bottom surfaces of host plate. The modified Halpin–Tsai micromechanical model is used to estimate the effective mechanical properties which vary continuously along thickness direction of the core layer. In addition, the electric potential is assumed to vary linearly through the thickness for each piezoelectric sublayer. A generalized C0-type higher-order shear deformation theory (C0-HSDT) in association with isogeometric analysis (IGA) is investigated. The effects of weight fractions and dispersion patterns of GPLs, the coefficient and distribution types of porosity as well as external electrical voltages on structure’s behaviors are investigated through several numerical examples. Keywords: piezoelectric materials; FG-porous plate; graphene platelet reinforcements; isogeometric analysis.
石墨烯片增强压电功能梯度多孔板的静力分析
在这项研究中,首次提出了用于压电层中嵌入石墨烯片(GPLs)增强的功能梯度多孔(FGP)板弯曲分析的等几何有限元公式。简称为PFGP-GPLs。该板由芯层组成,芯层包含均匀或不均匀分布在金属基体中的内部孔隙和gpl,两个压电层完美地粘合在主板的上下表面。采用改进的Halpin-Tsai微观力学模型对岩心层沿厚度方向连续变化的有效力学性能进行了估计。此外,假定电势随每个压电子层的厚度线性变化。研究了与等几何分析(IGA)相结合的广义c0型高阶剪切变形理论(C0-HSDT)。通过数值算例研究了gpl的质量分数和分散方式、孔隙率系数和分布类型以及外加电压对结构性能的影响。关键词:压电材料;FG-porous板;石墨烯血小板增强剂;isogeometric分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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