Effect of temperature on the stability of dielectric elastomers

Sheng, Junjie; Chen, Hualing; Li, Bo

doi:10.1088/0022-3727/44/36/365406

Cited by 41 publications

(32 citation statements)

References 32 publications

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“…The free energy model of the thermodynamic system can be expressed as

\begin{matrix} right \\ W (λ_{1}, λ_{2}, ξ_{1}, ξ_{2}, T, \tilde{D}) = \frac{T}{T_{0}} W_{stretch} (λ_{1}, λ_{2}, ξ_{1}, ξ_{2}) + ρ_{0} c_{0} \cdot \\ [T - T_{0} - T \ln (\frac{T}{T_{0}})] + \frac{{\overset{D}{true}}^{2}}{2 ɛ (T)} λ_{1}^{- 2} λ_{2}^{- 2} \end{matrix}

…”

Section: Working Principle Of Dielectric Elastomersmentioning

confidence: 99%

“…The equilibrium stretch

λ_{e}

increases with the increase of the external force, but slightly decreases with the increase of temperature. If a large force is applied on the membrane at a low temperature, the equilibrium stretch

λ_{e}

can be very large, which may result in a failure model known as rupture by stress …”

Section: Working Principle Of Dielectric Elastomersmentioning

confidence: 99%

“…Besides, the voltage actuation method is obscure in the previous research using static analysis, while the deformation of the dielectric elastomer is various when it is actuated by different voltages. Furthermore, although most of research about the dielectric elastomer are assumed to operate in an isothermal environment, it is reported that temperature also affects the electromechanical performances of dielectric elastomers to some extent . Meanwhile, the dielectric constant of the elastomer is strongly related to the temperature, as it is proved by the experiments of Jean‐Mistral C .…”

Section: Introductionmentioning

confidence: 99%

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Maximum actuation strain for dissipative dielectric elastomers with simultaneous effect of prestretch and temperature

Deng

et al. 2017

J of Applied Polymer Sci

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A dielectric elastomer can generate giant deformation by the voltage actuation, but the deformation is often hindered by the electromechanical instability and “snap‐through deformation,” which may lead to electrical breakdown. In this study, for the first time, the mathematical model is established for dissipative dielectric elastomers in the dynamic model with simultaneous effect of prestretch and temperature in order to achieve maximum actuation strain. The deformation of the dissipative dielectric elastomer: VHB 4905/4910 is investigated for the two simple actuation methods: constant and ramping voltage actuation, respectively. The best combined conditions of voltage and prestretch to obtain a large deformation at different operating temperatures are studied in detail. Under the best combined conditions, the influences of three factors: voltage, prestretch, and temperature on the maximum actuation strain are analyzed. This study should offer a great help in the design of dielectric elastomer actuators, and give the guidance to the accomplishment of the large deformation of dissipative dielectric elastomer actuators. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45850.

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“…The free energy model of the thermodynamic system can be expressed as

\begin{matrix} right \\ W (λ_{1}, λ_{2}, ξ_{1}, ξ_{2}, T, \tilde{D}) = \frac{T}{T_{0}} W_{stretch} (λ_{1}, λ_{2}, ξ_{1}, ξ_{2}) + ρ_{0} c_{0} \cdot \\ [T - T_{0} - T \ln (\frac{T}{T_{0}})] + \frac{{\overset{D}{true}}^{2}}{2 ɛ (T)} λ_{1}^{- 2} λ_{2}^{- 2} \end{matrix}

…”

Section: Working Principle Of Dielectric Elastomersmentioning

confidence: 99%

“…The equilibrium stretch

λ_{e}

increases with the increase of the external force, but slightly decreases with the increase of temperature. If a large force is applied on the membrane at a low temperature, the equilibrium stretch

λ_{e}

can be very large, which may result in a failure model known as rupture by stress …”

Section: Working Principle Of Dielectric Elastomersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Maximum actuation strain for dissipative dielectric elastomers with simultaneous effect of prestretch and temperature

Deng

et al. 2017

J of Applied Polymer Sci

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“…, and 100 m J = for VHB 4910 dielectric elastomer [12,14,17] . Figure 2(a) shows that the prestress value is high at high temperature.…”

Section: Eletromechanical Instabilitymentioning

confidence: 99%

“…But few reports have been released on the effect of temperature on actuation and instability of dielectric elastomer. Our previous study indicated that the increase in temperature can markedly contribute to improving the entropy production and the critical nominal electric field of the DE [17] . Recently, Liu et al [18] studied the thermo-electro-mechanical instability of dielectric elastomers by employing a Mooney-Rivlin model, but used independently determined value for the dielectric constant.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on electromechanical instability of dielectric elastomers

Sheng

Chen

et al. 2012

SPIE Proceedings

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The electromechanical behavior of dielectric elastomer is strongly affected by the temperature. Very few models accounting for the effects of temperature exist in the literature. A recent experiment showed that the variation of dielectric constant of the most widely used dielectric elastomer (VHB 4910, 3M) according to temperature is relatively significant. In this paper, we develop a thermodynamic model to study the influence of temperature on the instability in dielectric elastomer by involving deformation and temperature-dependent dielectric constant. The results indicate that the increase of temperature could improve the actuation stress and the electromechanical instability of the elastomer.

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Influence of the temperature and deformation‐dependent dielectric constant on the stability of dielectric elastomers

Sheng

Chen

et al. 2012

J of Applied Polymer Sci

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The performance of dielectric elastomers is affected by temperature and deformation, but very few models account for the effect of both factors. Recent experiments showed that the dielectric constant of the most widely used dielectric elastomer varies significantly with respect to temperature and deformation. We propose a model to study the influence of changes in dielectric constant on the electromechanical stability of dielectric elastomer. The model predicts the stability criteria with physical interpretation of its dependence on dielectric constant and electrostrictive coefficient. The numerical simulation indicates that the stress due to electrostriction relies on the temperature and deformation dependent dielectric constant and contributes to enhance the stability of the dielectric elastomer. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Effect of temperature on the stability of dielectric elastomers

Cited by 41 publications

References 32 publications

Maximum actuation strain for dissipative dielectric elastomers with simultaneous effect of prestretch and temperature

Maximum actuation strain for dissipative dielectric elastomers with simultaneous effect of prestretch and temperature

Effect of temperature on electromechanical instability of dielectric elastomers

Influence of the temperature and deformation‐dependent dielectric constant on the stability of dielectric elastomers

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