期刊
JOURNAL OF APPLIED PHYSICS
卷 111, 期 3, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3680878
关键词
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资金
- U.S. Army Research Office (ARO) [W911NF-09-1-0476]
- Defense Advanced Research Projects Agency (DARPA) [W911NF-10-1-0113]
- Materials Reseach Science and Engineering Center (MRSEC)
- Agency for Science, Technology and Research (A*STAR), Singapore
- Ministry of Education (Singapore)
- Austrian Science Fund [FWF-P22912-N20]
- Austrian Science Fund (FWF) [P22912] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 22912] Funding Source: researchfish
The dynamic performance of dielectric elastomer transducers and their capability of electromechanical energy conversion are affected by dissipative processes, such as viscoelasticity, dielectric relaxation, and current leakage. This paper describes a method to construct a model of dissipative dielectric elastomers on the basis of nonequilibrium thermodynamics. We characterize the state of the dielectric elastomer with kinematic variables through which external loads do work, and internal variables that measure the progress of the dissipative processes. The method is illustrated with examples motivated by existing experiments of polyacrylate very-high-bond dielectric elastomers. This model predicts the dynamic response of the dielectric elastomer and the leakage current behavior. We show that current leakage can be significant under large deformation and for long durations. Furthermore, current leakage can result in significant hysteresis for dielectric elastomers under cyclic voltage. (C) 2012 American Institute of Physics. [doi:10.1063/1.3680878]
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