CLC number: O33; O39
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2015-10-12
Cited: 4
Clicked: 18871
Feng-bo Zhu, Chun-li Zhang, Jin Qian, Wei-qiu Chen. Mechanics of dielectric elastomers: materials, structures, and devices[J]. Journal of Zhejiang University Science A, 2016, 17(1): 1-21.
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Abstract: Dielectric elastomers (DEs) respond to applied electric voltage with a surprisingly large deformation, showing a promising capability to generate actuation in mimicking natural muscles. A theoretical foundation of the mechanics of DEs is of crucial importance in designing DE-based structures and devices. In this review, we survey some recent theoretical and numerical efforts in exploring several aspects of electroactive materials, with emphases on the governing equations of electromechanical coupling, constitutive laws, viscoelastic behaviors, electromechanical instability as well as actuation applications. An overview of analytical models is provided based on the representative approach of non-equilibrium thermodynamics, with computational analyses being required in more generalized situations such as irregular shape, complex configuration, and time-dependent deformation. Theoretical efforts have been devoted to enhancing the working limits of DE actuators by avoiding electromechanical instability as well as electric breakdown, and pre-strains are shown to effectively avoid the two failure modes. These studies lay a solid foundation to facilitate the use of DE materials, structures, and devices in a wide range of applications such as biomedical devices, adaptive systems, robotics, energy harvesting, etc.
This review addresses a very important topic and provides a good summary of some recent theoretical and numerical efforts in understanding the mechanics of dielectric elastomers. In this review, the authors survey the theory and model development on dielectric elastomer actuators, including field theories, elastic and viscoelastic material laws, electromechanical instabilities, as well as some applications.
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