Su Yipin, Shen Xudong, Zhao Zinan, Wu Bin, Chen Weiqiu
Qihang Union & Innovation Center, Huanjiang Laboratory, Zhuji 311800, China.
Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China.
Materials (Basel). 2024 Mar 26;17(7):1499. doi: 10.3390/ma17071499.
Dielectric elastomers have attracted considerable attention both from academia and industry alike over the last two decades due to their superior mechanical properties. In parallel, research on the mechanical properties of dielectrics has been steadily advancing, including the theoretical, experimental, and numerical aspects. It has been recognized that the electromechanical coupling property of dielectric materials can be utilized to drive deformations in functional devices in a more controllable and intelligent manner. This paper reviews recent advances in the theory of dielectrics, with specific attention focused on the theory proposed by Dorfmann and Ogden. Additionally, we provide examples illustrating the application of this theory to analyze the electromechanical deformations and the associated bifurcations in soft dielectrics. We compared the bifurcations in elastic and dielectric materials and found that only compressive bifurcation modes exist in elastic structures, whereas both compressive and tensile modes coexist in dielectric structures. We summarize two proposed ways to suppress and prevent the tensile bifurcations in dielectric materials. We hope that this literature survey will foster further advancements in the field of the electroelastic theory of soft dielectrics.
在过去二十年里，介电弹性体因其卓越的机械性能而受到学术界和工业界的广泛关注。与此同时，关于电介质机械性能的研究也在稳步推进，涵盖理论、实验和数值等方面。人们已经认识到，介电材料的机电耦合特性可用于以更可控、更智能的方式驱动功能器件中的变形。本文综述了电介质理论的最新进展，特别关注了多夫曼（Dorfmann）和奥格登（Ogden）提出的理论。此外，我们提供了一些例子，说明该理论在分析软电介质中的机电变形及相关分岔方面的应用。我们比较了弹性材料和电介质材料中的分岔情况，发现弹性结构中仅存在压缩分岔模式，而电介质结构中压缩和拉伸模式共存。我们总结了两种抑制和防止电介质材料中拉伸分岔的方法。我们希望这篇文献综述能推动软电介质电弹性理论领域的进一步发展。
