Temperature effects on the dynamic response of viscoelastic dielectric elastomer

• 作 者: Hualing Chen Lei Liu Junshi Zhang Yongquan Wang Shuhai Jia
• 机 构: School of Mechanical Engineering, Xi\'an Jiaotong University,State Key Laboratory for Strength and
• 出 处: Theoretical & Applied Mechanics Letters
• 发表日期: 2013年05期
• 关键词: dielectric elastomer nominal viscoelastic magnitude hysteresis thermodynamic rhe

Viscoelasticity and temperature can significantly afect the performance of a dielectric elastomer.In the current study,we use a thermodynamic model to describe the efect of temperature and viscoelasticity on the electromechanical response undergoing a cyclic electric load by taking into account of the temperature dependent dielectric constant.Because of the significant viscoelasticity in the dielectric elastomer,the deformation and the nominal electric displacement can not keep in phase with the electric field at low frequencies.The results show that the magnitude of the cyclic electromechanical actuation strain increases with the decrease of the temperature and decreases with the increasing frequency,and viscoelasticity can result in significant hysteresis for dielectric elastomers under a relative low temperature and a low frequency.

Viscoelasticity and temperature can significantly afect the performance of a dielectric elastomer. In the current study, we use a thermodynamic model to describe the efect of temperature and viscoelasticity on the electromechanical response undergoing a cyclic electric load by taking into account of the temperature dependent dielectric constant .Because of the significant viscoelasticity in the dielectric elastomer, the deformation and the nominal electric displacement can not keep in phase with the electric field at low frequencies. The results show that the magnitude of the cyclic electromechanical actuation strain increases with the decrease of the temperature and decreases with the increasing frequency, and viscoelasticity can result in significant hysteresis for dielectric elastomers under a relative low temperature and a low frequency.