The interplay between symmetry-breaking and symmetry-preserving bifurcations in soft dielectric films and the emergence of giant electro-actuation?
The interplay between symmetry-breaking and symmetry-preserving bifurcations in soft dielectric films and the emergence of giant electro-actuation?
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DOI：
10.1016/j.eml.2020.101151
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发表时间：
2021-01-01
影响因子：
4.7
通讯作者：
Sharma, Pradeep
中科院分区：
文献类型：
--
作者：
Chen, Lingling;Yang, Xu;Sharma, Pradeep
在电场作用下可以表现出极大变形的软弹性体对于软机器人、可拉伸和柔性电子产品、能量收集等应用至关重要。这种材料的传统电致动中的关键限制因素是所谓的拉入不稳定性的发生。在这项工作中，我们展示了一个非常简单的方法，同轴的介电薄膜对一个破缺的干草叉分叉状态，同时避免拉在不稳定性。通过两个分叉模式之间的非线性相互作用，我们预测的电致动应变，超过传统的可能的200%，并在显着较低的外加电场。(C)2020爱思唯尔有限公司保留所有权利。
Soft elastomers that can exhibit extremely large deformations under the action of an electric field are essential for applications such as soft robotics, stretchable and flexible electronics, energy harvesting among others. The critical limiting factor in conventional electro-actuation of such materials is the occurrence of the so-called pull-in instability. In this work, we demonstrate an extraordinarily simple way to coax a dielectric thin film towards a symmetry-breaking pitchfork bifurcation state while avoiding pull-in instability. Through the nonlinear interplay between the two bifurcation modes, we predict electro-actuation strains that exceed what is conventionally possible by 200%, and at significantly lower applied electric fields. (C) 2020 Elsevier Ltd. All rights reserved.