Journal
SOFT MATTER
Volume 11, Issue 38, Pages 7483-7493Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sm01436k
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Funding
- National Natural Science Foundation of China [11321062]
- China Postdoctoral Science Foundation [2014M560761]
- China Scholarship Council
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This article describes the development of an analytical model to study the coupled nonlinear oscillation and stability evolution of viscoelastic dielectric elastomers (DEs) under non-equibiaxial tensile forces by utilizing the method of virtual work. Numerically calculated results are employed to predict this nonlinear dynamic behavior. The resonant frequency (where the amplitude-frequency response curve peaks) and the amplitude-frequency response of the deformation in both in-plane directions are tuned by varying the values of tensile force. The oscillation response in the two in-plane directions exhibits strong nonlinearity and coupling with each other, and is tuned by the changing tensile forces under a specific excitation frequency. By varying the values of tensile forces, the dynamic viscoelastic creep in a certain in-plane direction can be eliminated. Phase diagrams and Poincare maps under several values of tensile forces are utilized to study the stability evolution of the DE system under non-equibiaxial tensile forces.
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