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首页> 外文期刊>Applied Mathematical Modelling >Electro-thermo-mechanical torsional buckling of a piezoelectric polymeric cylindrical shell reinforced by DWBNNTs with an elastic core
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Electro-thermo-mechanical torsional buckling of a piezoelectric polymeric cylindrical shell reinforced by DWBNNTs with an elastic core

机译：带有弹性芯的DWBNNT增强的压电聚合物圆柱壳的电热机械扭转屈曲

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摘要

The effect of partially filled poly ethylene (PE) foam core on the behavior of torsional buckling of an isotropic, simply supported piezoelectric polymeric cylindrical shell made from polyvinylidene fluoride (PVDF), and subjected to combined electro-thermo-mechanical loads has been analyzed using energy method. The shell is reinforced by armchair double walled boron nitride nanotubes (DWBNNTs). The core is modeled as an elastic environment containing Winkler and Pasternak modules. Using representative volume element (RVE) based on micromechanical modeling, mechanical, electrical and thermal characteristics of the equivalent composite were determined. Critical buckling load is calculated using strains based on Donnell theory, the coupled electro-thermo-mechanical governing equations and principle of minimum potential energy. The results indicate that buckling strength increases substantially as harder foam cores are employed i.e. as Ec/Es is increased. The most economic in-fill foam core is at η = 0.6, as cost increases without much significant improvement in torsional buckling at higher η's.
机译：使用以下方法分析了部分填充的聚乙烯（PE）泡沫芯对由聚偏二氟乙烯（PVDF）制成的，各向同性，简单支撑的压电聚合物圆柱形圆柱壳的扭转屈曲行为的影响，该壳承受了电热机械载荷能量法。外壳由扶手椅双壁氮化硼纳米管（DWBNNT）加固。核心建模为包含Winkler和Pasternak模块的弹性环境。使用基于微力学建模的代表性体积元（RVE），确定了等效复合材料的机械，电气和热学特性。根据Donnell理论，耦合的电热机械控制方程式和最小势能原理，使用应变来计算临界屈曲载荷。结果表明，随着采用较硬的泡沫芯，即随着Ec / Es的增加，屈曲强度大大增加。最经济的填充泡沫内芯为η= 0.6，这是因为成本增加，而在较高η时的扭转屈曲没有明显改善。

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  • 来源
    《Applied Mathematical Modelling》 |2012年第7期|p.2983-2995|共13页
  • 作者

    A.A. Mosallaie Barzoki; A. Ghorbanpour Arani; R. Kolahchi; M.R. Mozdianfard;

  • 作者单位

    Department of Mechanical Engineering, Faculty of Engineering, University of Kashan, Kashan, Islamic Republic of Iran;

    Department of Mechanical Engineering, Faculty of Engineering, University of Kashan, Kashan, Islamic Republic of Iran Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Islamic Republic of Iran;

    Department of Mechanical Engineering, Faculty of Engineering, University of Kashan, Kashan, Islamic Republic of Iran;

    Department of Chemical Engineering, University ofKashan, Kashan, Islamic Republic of Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    DWBNNT; piezoelectric polymer; cylindrical shell; elastic core; electro-thermo-torsional buckling;

    机译：DWBNNT;压电聚合物圆柱壳弹性芯电热扭转屈曲;

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