文献类型：期刊文献

英文题名：Viscoelastic effects on the actuation performance of a dielectric elastomer actuator under different equal, un-equal biaxial prestretches

作者：Danh Quang Tran[1];Li, Jin[1];Xuan, Fuzhen[1];Xiao, Ting[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2018

卷号：5

期号：6

外文期刊名：MATERIALS RESEARCH EXPRESS

收录：;EI(收录号：20191306682127);WOS:【SCI-EXPANDED(收录号:WOS:000433937600003)】；

基金：This work was supported in part by the National Natural Science Foundation of China (Grant No. 51305138), and the Research Project of State Key Laboratory of Mechanical System and Vibration MSV201703.

语种：英文

外文关键词：dielectric elastomer actuator; pre-stretch; actuation performance; viscoelastic

摘要：Dielectric elastomers (DEs) are belonged to a group of polymers which cause a time-dependence deformation due to the effect of viscoelastic. In recent years, viscoelasticity has been accounted in the modeling in order to understand the complete electromechanical behavior of dielectric elastomer actuators (DEAs). In this paper, we investigate the actuation performance of a circular DEA under different equal, un-equal biaxial pre-stretches, based on a nonlinear rheological model. The theoretical results are validated by experiments, which verify the electromechanical constitutive equation of the DEs. The viscoelastic mechanical characteristic is analyzed by modeling simulation analysis and experimental to describe the influence of frequency, voltage, pre-stretch, and waveform on the actuation response of the actuator. Our study indicates that: The DEA with different equal or un-equal biaxial pre-stretches undergoes different actuation performance when subject to high voltage. Under an un-equal biaxial pre-stretch, the DEA deforms unequally and shows different deformation abilities in two directions. The relative creep strain behavior of the DEA due to the effect of viscoelasticity can be reduced by increasing pre-stretch ratio. Higher equal biaxial pre-stretch obtains larger deformation strain, improves actuation response time, and reduces the drifting of the equilibrium position in the dynamic response of the DEA when activated by step and period voltage, while increasing the frequency will inhibit the output stretch amplitude. The results in this paper can provide theoretical guidance and application reference for design and control of the viscoelastic DEAs.