介电型电活性聚合物驱动器机电耦合特性  

Electromechanical Characteristic of Dielectric Electroactive Polymer Actuator

作　　者：朱银龙[1] 王化明[2] 

机构地区：[1]南京林业大学机械电子工程学院,南京210037 [2]南京航空航天大学机电学院,南京210016

出　　处：《农业机械学报》2013年第12期301-306,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(51305209);江苏省自然科学基金资助项目(BK20130979);江苏省自然科学基金资助项目(BK2011735)

摘　　要：研究了介电型电活性聚合物（DEAP）的机电耦合特性，分析了电场作用下DEAP的受力情况，结合超弹性理论建立了DEAP的非线性机电耦合本构模型。对电场作用下圆形结构DEAP驱动器的变形行为进行建模研究，给出Yeoh形式的DEAP本构方程、平衡方程和边界条件。通过求解微分方程组得出DEAP驱动器薄膜中的主延伸率和主应力分布，同时分析了预拉伸率、驱动器主动区域面积及激励电压对驱动器变形的影响。利用试验研究了电激励下的圆形驱动器变形行为，试验结果与理论分析比较吻合，从而验证了本构模型的正确性。研究表明：预拉伸率取值为3～4比较合适。In order to study the electromechanical coupling characteristic of dielectric electroactive polymer, the force analysis of DEAP under electrical field was performed, and the nonlinear eleetromechanical constitutive model was presented by combing the hyperelastic theory. On the basis of the model, the mechanical behavior of circular actuator was discussed. The Yeoh form of DEAP constitutive equation, the equilibrium equations and the boundary conditions were given. Thus, the principal stretch ratio and principal stress in the membrane of DEAP actuator were obtained by solving the differential equations. At the same time, the influences of pre-streteh ratio, the area of active region and actuation voltages on deformation of actuator were analyzed. And the experimental results for deformation behavior of circular DEAP actuator under voltage actuation were consistent with the theoretical analysis results. It was found that the optimal pre-stretch ratio was 3 - 4.

关 键 词：介电型电活性聚合物 驱动器 机电耦合 

分 类 号：TB34[一般工业技术—材料科学与工程]