A two-dimensional electro-beam model for large deformation analysis of dielectric polymer actuators

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:165

Article

Dadgar-Rad, Farzam¹ 

[1] Univ Guilan, Dept Mech Engn, POB 3756, Rasht, Iran

关键词: Electroelasticity;    Electroactive polymers;    Bending actuator;    B-spline finite element;   

DOI  :  10.1016/j.ijsolstr.2019.01.034

来源: Elsevier

【 摘 要 】

The aim of this work is to develop a two-dimensional formulation for the large deformation analysis of dielectric polymer actuators under electrical loading. The kinematics of deformation is described as a Timoshenko beam enhanced by a thickness stretching term. Moreover, a second-order Taylor series expansion is used to approximate the electrical potential in the actuator. Accordingly, an eight-parameter electro-beam model for the theoretical formulation of the problem is introduced. The governing differential equations are expressed in a variational framework. A total Lagrangian nonlinear finite element formulation based on B-spline functions is developed to discretize and solve the highly nonlinear electromechanical problem. In the developed formulation, it is possible to approximate each field variable via B-spline functions of arbitrary order. Finally, large deformation of several actuators under various electrical loadings and boundary conditions is investigated in detail. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free