Dynamic electromechanical instability of a dielectric elastomer balloon

被引：42

作者：

Chen, Feifei ^{[1
]}

Zhu, Jian ^{[1
]}

Wang, Michael Yu ^{[1
,2
,3
]}

机构：

[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore

[2] Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Hong Kong, Hong Kong, Peoples R China

[3] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Hong Kong, Peoples R China

来源：

EPL | 2015年 / 112卷 / 04期

关键词：

SNAP-THROUGH INSTABILITY; NONLINEAR OSCILLATION; ACTUATORS; STABILITY;

D O I：

10.1209/0295-5075/112/47003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electromechanical instability, a significant phenomenon in dielectric elastomers, has been well studied in the literature. However, most previous work was based on the assumption that dielectric elastomers undergo quasi-static deformation. This letter investigates the dynamic electromechanical instability of a dielectric elastomer balloon which renders four types of oscillation subject to a parametric combination of DC and AC voltages. The simulated oscillations show that dynamic electromechanical instability occurs within quite a large range of excitation frequency, in the form of snap-through or snap-back, when the DC and AC voltages reach critical values. The balloon is at its most susceptible to dynamic electromechanical instability when the superharmonic, harmonic or subharmonic resonance is excited. Taking all excitation parameters into account, this letter analyzes the global critical condition which triggers the dynamic electromechanical instability of the balloon. Copyright (C) EPLA, 2015

引用

页数：5

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