Operational limits of a non-homogeneous dielectric elastomer transducer

Autor: Anup Teejo Mathew, Soo Jin Adrian Koh
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: International Journal of Smart and Nano Materials, Vol 8, Iss 4, Pp 214-231 (2017)
Druh dokumentu: article
ISSN: 1947-5411
1947-542X
19475411
DOI: 10.1080/19475411.2017.1421276
Popis: Operation of a dielectric elastomer (DE) transducer is limited by the way it fails, and any other limits imposed by the user. For example, material rupture and dielectric breakdown are two examples of transducer failure, while tension loss is a user-imposed limit. Electromechanical instability may or may not result in transducer failure, but is often considered as a boundary to denote the onset of state transition. For a DE undergoing homogeneous deformation, constructing operational limits on work-conjugate state diagrams are rather straight-forward. However, for DE subjected to non-homogeneous deformation, the process is more complex. We present a method to plot the operational boundaries of a DE subject to non-homogeneous deformation, known commonly as the Universal Muscle Actuator or the loudspeaker configuration. Our analysis show that tension loss need not be imposed as a hard operational limit, and that there is further operational space for the transducer, post tension loss. By plotting the operational limits on work-conjugate planes, we determine an optimal inner-to-outer ring ratio and the required pre-stretches that maximize energy conversion.
Databáze: Directory of Open Access Journals
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