Dynamic characteristic analysis and experiments of flexible structure based on electroactive polymer film

According to the theory model and property requirements proposed by Electroactive Polymer (EAP) film-based flexible and intelligent devices, a flexible structure device was fabricated using a ferroelectric polymeric film, the corresponding kinetic equation, vibration behavior model, and electromechanical property description for the flexible device were established, and the influence of pretension-bending rigidity, driving voltage and geometric parameters on the properties of the flexible device was investigated. The vibration behavior model and characteristic description for the flexible film device under the coupling effects of pretension-bending rigidity were presented, the influence of Young's modulus and pretension-rigidity ratio on the vibration behavior of flexible film device was illustrated through combing numerical analysis with finite element simulation, and then the mode shape of the EAP film-based flexible structure was simulated and measured by using the Finite Element Model (FEM) and laser Doppler technique. Furthermore, dynamic response characteristics of EAP film-based flexible structure versus the driving voltage and geometric parameters were indicated by a combined approach of piezoelectric excitation and laser vibrometer measurement. The research results demonstrate the validity of laser Doppler technique employed in the property test on the EAP film-based flexible and intelligent film devices, illustrate its the working mechanism and dynamic properties. and show the precision displacement to be 21.6 nm under a driving voltage of 1 V. This work can provide theoretic foundation and experimental supports for EAP-based flexible devices.