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Proceedings Paper

Effects of prestrain on behavior of dielectric elastomer actuator
Author(s): Hyouk Ryeol Choi; Kwangmok Jung; Nguyen Huu Chuc; Minyoung Jung; Igmo Koo; Jachoon Koo; Joonho Lee; Jonghoon Lee; Jaedo Nam; Misuk Cho; Youngkwan Lee
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Paper Abstract

Among ElectroActive Polymers (EAPs) the dielectric elastomer actuator is regarded as one of the most practically applicable in the near future. So far, its effect on the actuation phenomena has not been discussed sufficiently, although its strong dependency on prestrain is a significant drawback as an actuator. Recent observations clarifies that prestrain has the following pros and cons: prestrain plays an important role in generating large strain, whereas it rather contributes to the reduction of the strain. Prestrain provides the advantages of improving the response speed, increase of the breakdown voltage, and removing the boundary constraint caused by the inactive actuation area of the actuator. On the contrary, the elastic forces by prestrain makes the deformation smaller and the induced stress relaxation is severely detrimental as an actuator. Also, the permittivity decreases as prestrain goes up, which adds an adverse effect because the strain is proportional to the permittivity. In the present work, a comprehensive study on the effects of prestrain is performed. The key parameters affecting the overall performances are extracted and it is experimentally validated how they work on the actuation performance.

Paper Details

Date Published: 6 May 2005
PDF: 9 pages
Proc. SPIE 5759, Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD), (6 May 2005); doi: 10.1117/12.599363
Show Author Affiliations
Hyouk Ryeol Choi, Sungkyunkwan Univ. (South Korea)
Kwangmok Jung, Sungkyunkwan Univ. (South Korea)
Nguyen Huu Chuc, Sungkyunkwan Univ. (South Korea)
Minyoung Jung, Sungkyunkwan Univ. (South Korea)
Igmo Koo, Sungkyunkwan Univ. (South Korea)
Jachoon Koo, Sungkyunkwan Univ. (South Korea)
Joonho Lee, Sungkyunkwan Univ. (South Korea)
Jonghoon Lee, Sungkyunkwan Univ. (South Korea)
Jaedo Nam, Sungkyunkwan Univ. (South Korea)
Misuk Cho, Sungkyunkwan Univ. (South Korea)
Youngkwan Lee, Sungkyunkwan Univ. (South Korea)

Published in SPIE Proceedings Vol. 5759:
Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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