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A complete thermo–electro–viscoelastic characterization of dielectric elastomers, Part I: Experimental investigations
Journal of the Mechanics and Physics of Solids, Volume: 157, Start page: 104603
Swansea University Author: Mokarram Hossain
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Dielectric elastomers are a class of solid polymeric materials that are sufficiently soft to deform under the application of an electric field due to the interaction of quasi-static electric charges. Their potential to undergo large deformations renders them promising candidates for the design of en...
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Dielectric elastomers are a class of solid polymeric materials that are sufficiently soft to deform under the application of an electric field due to the interaction of quasi-static electric charges. Their potential to undergo large deformations renders them promising candidates for the design of energy harvesters, sensors and soft actuators. For their application however, the influence of additional thermal effects should be taken into account as the base materials frequently show a distinct thermal sensitivity that drastically influences their mechanical response. This contribution presents the results of a wide range of experiments conducted on the popular dielectric elastomer VHB 4905™ under a combination of mechanical, thermal and electric loading scenarios. These experiments are performed in such a way that the obtained results are well suited for the identification of the necessary material parameters appearing in a thermo–electro–viscoelastic constitutive model that will subsequently be presented in the second part of the contribution.
Dielectric elastomers; Electro-active polymers; Thermo–mechanics; Electro–mechanics
College of Engineering
DFG project No. STE 544/52-2 and GRK2495/C; Engineering and Physical Sciences Research Council (EPSRC), grant number (EP/R511614/1).