Li Jiangfei, Wang Zehua, Zhou Jianyou
School of Science, Harbin Institute of Technology, Shenzhen 518055, China.
Polymers (Basel). 2024 Dec 23;16(24):3612. doi: 10.3390/polym16243612.
As a category of polymeric materials, soft dielectrics, such as most elastomers and rubber-like materials, have shown great potential for extensive applications in various fields. Owing to their intriguing electromechanical coupling behaviors, the morphological instabilities in soft dielectrics have been an active research field in recent years. In this work, the recent progress in experimental and theoretical research on their electromechanical morphological instabilities is reviewed, especially regarding the theoretical aspect. First, we revisit the theoretical framework for the electroelasticity of soft dielectrics. Then, the typical configurations of soft dielectric membranes used to generate two typical types of surface instabilities, namely wrinkles and creases, are introduced. Three commonly used modeling approaches (i.e., the stress balance method, the incremental method, and the energy method) for surface instabilities are reviewed with specific examples. Moreover, discussions on the difference between these methods and the corresponding critical loading conditions are presented. Furthermore, this review also covers the relation and transition between wrinkling and creasing phenomena.
作为一类聚合材料，软电介质，如大多数弹性体和类橡胶材料，在各个领域都显示出了广泛应用的巨大潜力。由于其有趣的机电耦合行为，软电介质中的形态不稳定性近年来一直是一个活跃的研究领域。在这项工作中，我们回顾了软电介质机电形态不稳定性的实验和理论研究的最新进展，特别是在理论方面。首先，我们重新审视软电介质电弹性的理论框架。然后，介绍了用于产生两种典型表面不稳定性（即皱纹和折痕）的软电介质膜的典型构型。通过具体例子回顾了三种常用的表面不稳定性建模方法（即应力平衡法、增量法和能量法）。此外，还讨论了这些方法之间的差异以及相应的临界加载条件。此外，本综述还涵盖了皱纹和折痕现象之间的关系和转变。
