Giant voltage-induced deformation of a dielectric elastomer under a constant pressure
Giant voltage-induced deformation of a dielectric elastomer under a constant pressure
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DOI：
10.1063/1.4895815
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发表时间：
2014-09
影响因子：
4
通讯作者：
Hareesh Godaba;C. C. Foo-C.;Zhi-qian Zhang;B. Khoo;Jian Zhu
中科院分区：
文献类型：
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作者：
Hareesh Godaba;C. C. Foo-C.;Zhi-qian Zhang;B. Khoo;Jian Zhu
电介质弹性体致动器与液体耦合最近已经发展为软泵，软透镜，盲文显示器等。在本文中，我们研究的电介质弹性体致动器，这是与水耦合的性能。实验表明，当受到恒定压力时，介电弹性体的膜可以实现1165%的巨大的电压诱导的面积应变。理论和实验都表明，压力在决定机电行为中起着重要的作用。实验还表明，电介质弹性体致动器，当耦合液体，可能会遭受机械不稳定性和崩溃后，大量的液体被包围的膜。在设计软致动器时需要考虑这种失效模式。
Dielectric elastomer actuators coupled with liquid have recently been developed as soft pumps, soft lenses, Braille displays, etc. In this paper, we investigate the performance of a dielectric elastomer actuator, which is coupled with water. The experiments demonstrate that the membrane of a dielectric elastomer can achieve a giant voltage-induced area strain of 1165%, when subject to a constant pressure. Both theory and experiment show that the pressure plays an important role in determining the electromechanical behaviour. The experiments also suggest that the dielectric elastomer actuators, when coupled with liquid, may suffer mechanical instability and collapse after a large amount of liquid is enclosed by the membrane. This failure mode needs to be taken into account in designing soft actuators.