Characterization of Hyperelastic Dielectric Elastomer Based on Biaxial Tensile Bench

Abstract

Usually model parameters from uniaxial experiments are not suitable for dielectric elastomer under biaxial loading condition. To characterize the mechanical behavior of dielectric elastomer, a biaxial tensile bench is established, on which uniaxial tests can be performed too. On the basis of the analysis of viscous effect of elastomer, experimental condition for data acquirement is determined. Then equi-biaxial and uniaxial experimental data are obtained to fit three constitutive models, i.e. Mooney-Rivlin, Yeoh and Ogden model. Also, least square minimization method is used to obtained model parameters, which are applicable to both uniaxial and equi-biaxial experimental data.

Largely Enhanced Energy Harvesting Performance of Silicone-Based Dielectric Elastomer Generators through Controlling the Uniaxial Device Structure

“…It not only affects the generated energy by influencing A 1 / A 2 and the maximum bias voltage that can be applied but also determines the geometric structure of DE film and the practicality of the device to a large extent. There are mainly two classifications of stretching modes for DEG: linear force-driving modes, such as uniaxial and conical stretching, ,− and nonlinear force-driving modes, such as biaxial and equibiaxial stretching. , Considering the wide range of linear force sources and the high reliability of simple transmission mechanisms, uniaxial stretching, which has the simplest structure, is the most promising stretching mode for DEG. Current research on uniaxial stretch-driven DEG mainly focuses on establishing a coupling model of DE materials to explore the effects of mechanical or electrical loading conditions on their deformation state of DE materials or investigating the energy harvesting performance of novel DE materials by using device structures with specific geometries. ,, However, few studies have attempted to improve the energy harvesting performance of uniaxial DEG through structural design, and the optimal DE geometry for this type of DEG remains unclear.…”

“…There are mainly two classifications of stretching modes for DEG: linear force-driving modes, such as uniaxial and conical stretching, 15,19−21 and nonlinear forcedriving modes, such as biaxial and equibiaxial stretching. 13,22 Considering the wide range of linear force sources and the high reliability of simple transmission mechanisms, uniaxial stretching, which has the simplest structure, is the most promising stretching mode for DEG. Current research on uniaxial stretch-driven DEG mainly focuses on establishing a coupling model of DE materials to explore the effects of mechanical or electrical loading conditions on their deformation state of DE materials or investigating the energy harvesting performance of novel DE materials by using device structures with specific geometries.…”

Electrostatic model of dielectric elastomer generator based on finite element

“…In order to investigate the distribution of Maxwell stress in dielectric elastomer materials under electric field during power generation 19 , 20 , the electrostatic model of dielectric elastomer materials was established in COMSOL finite element simulation software environment based on theoretical deduction. Based on the simulation results, the electromechanical characteristics of DEG are studied.…”