Dynamic modeling and analysis for dielectric elastomer tube actuators

Abstract

Dielectric elastomer tubular actuators (DETA) as a new type of smart material actuator, has attracted wide attention in recent years. Its basic working principle is to use the deformation generated by dielectric elastomers (DEs) under the electric field to achieve the actuation function. Compared with the traditional actuators, DETA has the advantages of high energy density, fast response, simple structure, lightweight, soft and large deformation. In engineering applications, good structural design can improve the efficiency of actuation, reduce energy loss and prolong service life. The purpose of this paper is to explore the electromechanical coupling principle of DETA. Based on the Absolute Nodal Coordinate Formulation (ANCF), we use the electromechanically coupled 8-node hexahedral element, and consider the viscoelastic properties of the material to derive the dynamic equations of the flexible system containing DETA. Subsequently, the static and dynamic behaviors of the system are studied, and the correctness and validity of the method proposed in this work are verified by comparing with the experimental results. The research in this paper not only enriches the modeling and theoretical analysis of DEs, but also provides new ideas and methods for its application.