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Active control for ratios of strains in functionally graded piezoelectric composites

机译：功能梯度压电复合材料中菌株比率的主动控制

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摘要

Poisson's ratio measured by the ratio of transverse strain to longitudinal strain is an important intrinsic property of materials. Imitating the definition of Poisson's ratio, we define that the ratio of strains is denoted by the ratio of any two normal strains. Nowadays, some design methods have been proposed to tailor the ratios of strains by changing Poisson's ratio in materials. However, the ranges of the ratios of strains by available methods are too narrow, the technology can provide materials with tailorable ratios of strains over an extremely wide range is rarely studied. To this end, we propose that the ratios of strains in piezoelectric composites can be active-controlled by simultaneously tailoring force and electric fields. The analytical solutions for different ratios of strains in piezoelectric composites subjected to force and electric fields are presented. It is demonstrated that the range of tunable ratios of strains can be from giant negative to giant positive. Moreover, the ratios of strains in any location of FG piezoelectric composites can be greatly affected by force field, electric field, polarization direction, volume fraction of piezoelectric phase. The present study may open up a new routine to design materials possessing extraordinary and programmable mechanical behaviors.
机译：通过横向应变与纵向菌株的比率测量的泊松比是材料的重要内在性质。模仿泊松比的定义，我们定义了菌株的比例由任何两个正常菌株的比例表示。如今，已经提出了一些设计方法来定制菌株的比率通过改变泊松的材料。然而，通过可用方法的菌株比率的范围太窄，该技术可以在很广泛的范围内提供具有可定制菌株的菌株的材料。为此，我们提出了通过同时定制力和电场来主动控制压电复合材料中菌株的比例。提出了经受力和电场的压电复合材料中不同比例的分析解。结果表明，菌株的可调比率可以是从巨型阴性的巨大阳性。此外，FG压电复合材料的任何位置中的菌株的比率可以大大影响力场，电场，偏振方向，压电相体积分数。本研究可能开辟新的例程，以设计具有非凡和可编程的机械行为的材料。

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  • 来源
    《Composite Structures》 |2020年第3期|111861.1-111861.11|共11页
  • 作者

    Tang Haishan; Hu Yujin; Li Li; Ling Ling;

  • 作者单位

    Huazhong Univ Sci & Technol Sch Mech Sci & Engn State Key Lab Digital Mfg Equipment & Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mech Sci & Engn State Key Lab Digital Mfg Equipment & Technol Wuhan 430074 Peoples R China;

    Nanyang Technol Univ Sch Mech & Aerosp Engn Nanyang Ave Singapore 639798 Singapore;

    Huazhong Univ Sci & Technol Sch Mech Sci & Engn State Key Lab Digital Mfg Equipment & Technol Wuhan 430074 Peoples R China;

  • 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

    Active control; Ratios of strains; Functionally graded; Piezoelectric composite; Electric field; Force field;

    机译：主动控制;菌株的比例;功能渐变;压电复合材料;电场;力场;

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