Micro-electromechanical Model of a Piezoelectric fiber/Piezopolymer matrix composite Actuator

압전섬유/압전지지 복합재 작동기의 전기-기계적 마이크로모델

  • 김철 (경북대학교 기계공학과) ;
  • 구건형 (경북대학교 기계공학과 대학원)
  • Published : 2001.11.01

Abstract

Piezoelectric Fiber Composites with Interdigitated Electrodes (PFCIDE) were previously introduced as an alternative to monolithic wafers with conventional electrodes for applications of structural actuation. This paper is an investigation into the performance improvement of piezoelectric fiber composite actuators by changing the matrix material. This paper presents a modified micro-electromechanical model of a piezoelectric fiber/piezopolymer matrix composite actuator with interdigitated electrodes (PFPMIDE). Various concepts from different backgrounds including three-dimensional linear elastic and dielectric theories have been incorporated into the present linear piezoelectric model. The rule of mixture and the modified method to calculate the effective properties of fiber composites are extended to apply to the PFPMIDE model. The new model is validated comparing with available experimental data and other analytical results.