发生皱缩变形的功能梯度电子管增强的柔电响应

IF 2 3区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jianhua Ma, Jinrui Xu, Jun Li, Binglei Wang
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引用次数: 0

摘要

电介质在外力作用下的非均匀变形可诱发挠电效应,这种现象将电极化与应变梯度耦合在一起。然而,受尺寸效应的限制,挠电效应在宏观尺度上并不显著,只有在微观和纳米尺度上才会出现。在最近的工作中,我们通过使嵌入电荷的电介质(即驻极体)皱缩,获得了相当大的类似挠电的响应,从而显著改善了宏观尺度上的挠电效应。在这项工作中,我们通过对驻极体薄膜进行梯度处理,进一步优化了挠电响应的宏观性能。具体来说,我们以不同厚度、电荷密度和杨氏模量的梯度作为关键设计变量,分析推导了皱褶驻极体薄膜的机电耦合。结果表明,梯度导向驻极体薄膜可以调整到均匀驻极体薄膜的近五倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Enhanced Flexoelectric Response from Functionally Gradient Electrets Undergoing Crumpling Deformation

Enhanced Flexoelectric Response from Functionally Gradient Electrets Undergoing Crumpling Deformation

Non-uniform deformation of the dielectric subjected to external forces can induce the flexoelectric effect, a phenomenon that couples electrical polarization to strain gradients. However, limited by the size effects, flexoelectricity is not significant at the macroscale and only becomes catchable at the microscale and nanoscale. In recent work, we obtained a considerable flexoelectric-like response by crumpling the dielectric embedded with charges, i.e., the electret, which significantly improved the flexoelectric effect at the macroscale. In this work, we further optimize the macroscopic performance of the flexoelectric response by applying gradient treatment to the electret films. Specifically, we analytically derive the electromechanical coupling of crumpled electret films with gradients of different thicknesses, charge densities, and Young’s moduli as key design variables. It is shown that the gradient-oriented electret film can be tuned to nearly five times that of a uniform electret film.

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来源期刊
Acta Mechanica Solida Sinica
Acta Mechanica Solida Sinica 物理-材料科学:综合
CiteScore
3.80
自引率
9.10%
发文量
1088
审稿时长
9 months
期刊介绍: Acta Mechanica Solida Sinica aims to become the best journal of solid mechanics in China and a worldwide well-known one in the field of mechanics, by providing original, perspective and even breakthrough theories and methods for the research on solid mechanics. The Journal is devoted to the publication of research papers in English in all fields of solid-state mechanics and its related disciplines in science, technology and engineering, with a balanced coverage on analytical, experimental, numerical and applied investigations. Articles, Short Communications, Discussions on previously published papers, and invitation-based Reviews are published bimonthly. The maximum length of an article is 30 pages, including equations, figures and tables
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