Electro-viscoelastic performance of a tubular dielectric elastomer actuator

doi:10.1007/s10999-018-9408-7

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	Electro-viscoelastic performance of a tubular dielectric elastomer actuator
	He, Tianhu; Wang, Zhengang
刊名	INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
	2019-06
卷号	15 期号:2 页码:199-212
关键词	Soft active material Dielectric elastomer membrane Viscoelasticity Electromechanical performance Instability
ISSN号	1569-1713
DOI	10.1007/s10999-018-9408-7
英文摘要	To reveal the electro-viscoelastic performance of a tubular dielectric elastomer actuator, a dissipative model for the actuator is formulated by adopting the nonlinear theory of viscoelastic dielectrics. The actuator is made by rolling a layer of dielectric elastomer membrane into a tube, which is then fixed tightly with two rigid disks at top and bottom edges respectively. Once actuated by internal pressure and voltage, the tube inflates and deforms into an out-of plane shape, undergoing large deformation. To depict the deformation, the non-equilibrium thermodynamics is employed to derive the state equations and the governing equations, and to characterize the dissipative process, a rheological spring-dashpot model is applied to obtaining the kinetic equations. Numerical simulation is conducted by a joint use of the shooting method and the improved Euler method, and the variations of the considered variables and the profiles of the deformed tube are obtained and demonstrated graphically. The effects of the internal pressure, the voltage as well as the aspect ratio of the tube on the performance of the actuator are considered. The results show that for small pressure or small voltage, the actuator can eventually evolve into a stable state, while for large pressure or large voltage, the actuator can't reach a stable state due to the occurrence of purely mechanical instability or electromechanical instability. As for the aspect ratio, it significantly influences the performance of the actuator. It is hoped that the approach may provide a better understanding of the electro-viscoelastic performance of such actuators and some guidelines in designing such actuators.
资助项目	National Natural Science Foundation of China[11372123]
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000467488400001
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31817]
专题	研究生院
通讯作者	He, Tianhu
作者单位	Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	He, Tianhu,Wang, Zhengang. Electro-viscoelastic performance of a tubular dielectric elastomer actuator[J]. INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN,2019,15(2):199-212.
APA	He, Tianhu,&Wang, Zhengang.(2019).Electro-viscoelastic performance of a tubular dielectric elastomer actuator.INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN,15(2),199-212.
MLA	He, Tianhu,et al."Electro-viscoelastic performance of a tubular dielectric elastomer actuator".INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN 15.2(2019):199-212.