具有线性介电常数的Ogden型介电弹性体的本构关系和机电稳定性

应用多材料常数的Ogden弹性应变能函数分析了介电弹性体的力学行为,研究了介电弹性体的机电稳定性.数值结果表明,通过对材料系数(如材料常数比和电致伸缩系数等)的恰当调节可以使得介电弹性体材料或介电弹性体结构更趋稳定.这些有益于深入理解介电弹性体的机电稳定性行为,进而设计恰当的介电弹性体器件.

CONSTITUTIVE RELATION ELECTROMECHANICAL STABILITY ANALYSIS OF OGDEN TYPE DIELECTRIC ELASTOMER WITH LINEAR PERMITTIVITY

The Ogden elastic strain energy function with multiple material constants is applied to analyze the mechanical performance of dielectric elastomers.The electromechanical stability is investigated in detail.Numerical results show that the proper improvement of material coefficients including the material constant ratio and the electrostriction coefficient can enhance the stability performance of the dielectric elastomer or the dielectric elastomer structure.All these results are helpful in understanding further the stability performance and design of actuators based on dielectric elastomer.