介电弹性体
弹性体
电介质
材料科学
聚合物
拉伤
电压
不稳定性
执行机构
复合材料
变形(气象学)
机械
物理
电气工程
工程类
光电子学
内科学
医学
作者
Soo Ngee Koh,Tiefeng Li,Jinxiong Zhou,Xuanhe Zhao,Wei Hong,Jian Zhu,Zhigang Suo
摘要
Subject to a voltage, a dielectric elastomer (DE) deforms. Voltage-induced strains of above 100% have been observed when DEs are prestretched, and for DEs of certain network structures. Understanding mechanisms of large actuation strains is an active area of research. We propose that the voltage-stretch response of DEs may be modified by prestretch, or by using polymers with “short” chains. This modification results in suppression or elimination of electromechanical instability, leading to large actuation strains. We propose a method to select and design a DE, such that the actuation strain is maximized. The theoretical predictions agree well with existing experimental data. The theory may contribute to the development of DEs with exceptional performance. © 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2011
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