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标题：Styrenic-Rubber Dielectric Elastomer Actuator with Inherent Stiffness Compensation
其他标题：Styrenic-Rubber Dielectric Elastomer Actuator with Inherent Stiffness Compensation
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作者：Giacomo Moretti ; Luca Sarina ; Lorenzo Agostini 等
期刊名称：Actuators
电子版ISSN：2076-0825
出版年度：2020
卷号：9
期号：2
页码：44
DOI：10.3390/act9020044
出版社：MDPI Publishing
摘要：Up to date, Dielectric Elastomer Actuators (DEA) have been mostly based on either silicone or acrylic elastomers, whereas the potential of DEAs based on inexpensive, wide-spread natural and synthetic rubbers has been scarcely investigated. In this paper, a DEA based on a styrene-based rubber is demonstrated for the first time. Using a Lozenge-Shaped DEA (LS-DEA) layout and following a design procedure previously proposed by the authors, we develop prototypes featuring nearly-zero mechanical stiffness, in spite of the large elastic modulus of styrenic rubber. Stiffness compensation is achieved by simply taking advantage of a biaxial pre-stretching of the rubber DE membrane, with no need for additional stiffness cancellation mechanical elements. In the paper, we present a characterization of the styrene rubber-based LS-DEA in different loading conditions (namely, isopotential, isometric, and isotonic), and we prove that actuation strokes of at least 18% the actuator side length can be achieved, thanks to the proposed stiffness-compensated design.
关键词：dielectric elastomer; actuator; stiffness compensation; negative spring design dielectric elastomer ; actuator ; stiffness compensation ; negative spring design