Vibrations and waves in soft dielectric elastomer structures

Zhao, Zinan; Chen, Yingjie; Hu, Xueyan; Bao, Rui; Wu, Bin; Chen, Weiqiu

doi:10.1016/j.ijmecsci.2022.107885

Cited by 29 publications

(10 citation statements)

References 176 publications

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“…Some properties of DE tubes, such as being less bulky and more adaptable to be used in diverse applications, endow DE tubes with priority over different geometries like planar DE actuators [15][16][17]. Other studies suggested that the DE can be operated as tunable phononic crystals to design the DE wave devices with tunable band structures [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Axisymmetric vibration and stability of dielectric-elastic tubular bilayer system

Almamo,

Su,

Chen

et al. 2024

Proc. R. Soc. A.

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Modern transducers and actuators may have functional layers with multi-field coupling and some elastic layers. This paper considers a tubular bilayer system consisting of a thin dielectric tube coated with a thick elastic layer. We study the nonlinear electromechanical response and the linear axisymmetric vibration of the system subject to different applied voltages and inner/outer pressures within the framework of the general nonlinear theory of electro-elasticity, the related linear incremental theory, and by considering the continuity conditions at the interface. We investigate instability behaviour using the same basic formulae. The state-space method provides efficient and accurate free vibration analysis, considering the dynamic response at the lowest frequencies, so we can neglect the viscous and damping effects, which is well suited to this problem. New results indicate that the bilayer system improves its frequency capability and stability compared to the monolayer dielectric tube. The thick outer elastic layer stiffens the bilayer system against axisymmetric bifurcation, bulging and necking instabilities. It also performs better in front of axisymmetric instability, increasing the system’s capability to receive or produce higher voltages, especially for long waves.This work thoroughly explains bilayer functional systems’ behaviour when exposed to extreme environments such as high voltage or pressure.

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Section: Introductionmentioning

confidence: 99%

Axisymmetric vibration and stability of dielectric-elastic tubular bilayer system

Almamo,

Su,

Chen

et al. 2024

Proc. R. Soc. A.

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“…Several efforts have been devoted to summarizing the advances in the study of DEs from different aspects. For example, a systematic review was conducted by Zhao et al on the current research regarding the vibration and wave characteristics of DEs, highlighting the shortcomings in the present studies [38]. Lu et al summarized the application of the nonlinear electroelastic theory for solving the boundary-value problems in DE structures with varying configurations and provided a review of the performance of existing DE transducers [39].…”

Section: Introductionmentioning

confidence: 99%

Electromechanical Deformations and Bifurcations in Soft Dielectrics: A Review

Su,

Shen,

Zhao

et al. 2024

Materials

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Dielectric elastomers have attracted considerable attention both from academia and industry alike over the last two decades due to their superior mechanical properties. In parallel, research on the mechanical properties of dielectrics has been steadily advancing, including the theoretical, experimental, and numerical aspects. It has been recognized that the electromechanical coupling property of dielectric materials can be utilized to drive deformations in functional devices in a more controllable and intelligent manner. This paper reviews recent advances in the theory of dielectrics, with specific attention focused on the theory proposed by Dorfmann and Ogden. Additionally, we provide examples illustrating the application of this theory to analyze the electromechanical deformations and the associated bifurcations in soft dielectrics. We compared the bifurcations in elastic and dielectric materials and found that only compressive bifurcation modes exist in elastic structures, whereas both compressive and tensile modes coexist in dielectric structures. We summarize two proposed ways to suppress and prevent the tensile bifurcations in dielectric materials. We hope that this literature survey will foster further advancements in the field of the electroelastic theory of soft dielectrics.

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“…Compared with ionic EAPs, electronic EAPs have the advantages of a wide linear response range, high flexibility, long life, good reliability, and high efficiency [ 6 , 7 ]. Dielectric elastomers (DEs) are a kind of electronic EAPs, which have the characteristics of high elastic energy density, ultra-short response time, and flexibility, and can convert electrical energy into mechanical energy under electric fields, which have been widely used in the field of soft robots, wearable electronics, and human/machine interface equipment [ 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of PANI/CuPc/PDMS Composite Elastomer with High Dielectric Constant and Low Modulus Assisted by Electric Fields

Hu,

Chu,

Liu

et al. 2024

Polymers

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Dielectric elastomer is a kind of electronic electroactive polymer, which plays an important role in the application of soft robots and flexible electronics. In this study, an all-organic polyaniline/copper phthalocyanine/silicone rubber (PANI/CuPc/PDMS) dielectric composite with superior comprehensive properties was prepared by manipulating the arrangement of filler in a polymer matrix assisted by electric fields. Both CuPc particles and PANI particles can form network structures in the PDMS matrix by self-assembly under electric fields, which can enhance the dielectric properties of the composites at low filler content. The dielectric constant of the assembled PANI/CuPc/PDMS composites can reach up to 140 at 100 Hz when the content of CuPc and PANI particles is 4 wt% and 2.5 wt%, respectively. Moreover, the elastic modulus of the composites remains below 2 MPa, which is important for electro-deforming. The strain of assembled PANI/CuPc/PDMS three-phase composites at low electric field strength (2 kV/mm) can increase up to five times the composites with randomly dispersed particles, which makes this composite have potential application in the field of soft robots and flexible electronics.

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Vibrations and waves in soft dielectric elastomer structures

Cited by 29 publications

References 176 publications

Axisymmetric vibration and stability of dielectric-elastic tubular bilayer system

Axisymmetric vibration and stability of dielectric-elastic tubular bilayer system

Electromechanical Deformations and Bifurcations in Soft Dielectrics: A Review

Preparation of PANI/CuPc/PDMS Composite Elastomer with High Dielectric Constant and Low Modulus Assisted by Electric Fields

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