Abstract As is known, the ambient environment, such as temperature and humidity, may affect the electromechanical properties of dielectric elastomer (DE). In this research, we carry out an analysis to explore the humidity effect on electromechanical performance of a viscoelastic DE, by prescribing the shear moduli, the viscous damping, and the relative dielectric constant of the DE are humidity-dependent values. The dependency relationships between these parameters and the relative humidity are obtained by fitting the presupposed models to experimental data. The humidity effect on static and dynamic electromechanical performances is explored by exhibiting the creeping deformation of both elastic and non-elastic stretch of the viscoelastic DE. Phase paths and Poincare maps are utilized to detect the humidity effect on the stability and periodicity of the nonlinear vibration. Finally, the variation tendency of resonant frequency of the viscoelastic DE system is investigated by continuously varying the relative humidity.

中文翻译：

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湿度对粘弹性介电弹性体机电性能影响的建模

摘要 众所周知，周围环境，如温度和湿度，可能会影响介电弹性体（DE）的机电性能。在这项研究中，我们通过规定 DE 的剪切模量、粘性阻尼和相对介电常数是与湿度相关的值，进行了一项分析，以探索湿度对粘弹性 DE 的机电性能的影响。这些参数与相对湿度之间的依赖关系是通过将预设模型与实验数据拟合得到的。通过展示粘弹性 DE 的弹性和非弹性拉伸的蠕变变形来探索湿度对静态和动态机电性能的影响。利用相位路径和庞加莱图来检测湿度对非线性振动稳定性和周期性的影响。最后，通过连续改变相对湿度来研究粘弹性DE系统共振频率的变化趋势。