Optimization of Load-driven Soft Dielectric Elastomer Generators

Bortot, Eliana, Springhetti, Roberta, deBotton, Gal and Gei, Massimiliano (2015) Optimization of Load-driven Soft Dielectric Elastomer Generators. Procedia IUTAM, 12. pp. 42-51. ISSN 2210-9838

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Official URL: http://dx.doi.org/10.1016/j.piutam.2014.12.006

Abstract

The performance of energy harvesting generators based on dielectric elastomers is investigated in this contribution. The amount of energy extracted by a four-step load-driven cycle is constrained by structural instabilities due to the loss of tension, the electric breakdown and the ultimate stretch ratio. To identify the optimal cycle complying with these limits, we formulate a constraint optimization problem proving the dependency of the generator performance on the ultimate stretch ratio and, moreover, a universal limit on the dielectric strength beyond which the optimal cycle is independent of this parameter. Thus, we reveal that there is an upper bound on the amount of harvested energy that depends only on the ultimate stretch ratio.

Item Type: Article
Uncontrolled Keywords: Energy harvesting, electro-active polymers, smart materials, optimization, electroelasticity
Subjects: H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 10 Apr 2019 12:24
Last Modified: 10 Apr 2019 12:30
URI: http://nrl.northumbria.ac.uk/id/eprint/38897

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