介电弹性体复合材料的热力学和热机电稳定性
摘要
This paper studied the thermodynamic and thermo-electro-mechanical stability of silicone type dielectric elastomer composites. A permittivity model of dielectric elastomer composites for building the electric field energy of system is proposed by considering the coupling effect of temperature, doping, and electrostriction. Based on this, the thermodynamic and thermo-electro-mechanical stability performance of the composites is analyzed by using Ogden model. The results showed that when the electrostriction coefficient decreases, or the material constant ratio decreases, or the temperature increases, or the phenomenology parameters increase, or the electrostriction coefficient ratio increases, the nominal electric field of dielectric elastomer increases, which enhances the stability of thermo-electro-mechanical system. These conclusions are a great help for us in designing and fabricating the silicone type dielectric elastomer composites and its actuators.