Modeling and simulation of dielectric elastomer actuators
Modeling and simulation of dielectric elastomer actuators
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DOI：
10.1088/0964-1726/14/6/032
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发表时间：
2005-12-01
影响因子：
4.1
通讯作者：
Mazza, E
中科院分区：
文献类型：
--
作者：
Wissler, M;Mazza, E
介电弹性体被用作所谓的电活性聚合物（EAP）致动器的基础材料。一个程序和一个特定的本构模型（丙烯酸弹性体VHB 4910）在这项工作中的一般形状和设置的介电弹性体致动器的有限元建模和仿真。采用Yeoh应变能势和Prony级数描述了介质弹性体的大应变时变力学响应。材料参数通过单轴实验（松弛测试和拉伸测试）确定。因此，反问题的解决，使用迭代有限元计算。建立了一个预应变的圆形致动器，并以预定义的电压激活。建立了圆形驱动器的三维有限元模型，并对机电驱动过程进行了仿真。仿真和实际测量同意在很大程度上，从而导致本构模型和致动器的仿真程序在这项工作中提出的验证。
Dielectric elastomers are used as base material for so-called electroactive polymer (EAP) actuators. A procedure and a specific constitutive model (for the acrylic elastomer VHB 4910) are presented in this work for finite element modeling and simulation of dielectric elastomer actuators of general shape and set-up. The Yeoh strain energy potential and the Prony series are used for describing the large strain time-dependent mechanical response of the dielectric elastomer. Material parameters were determined from uniaxial experiments (relaxation tests and tensile tests). Thereby the inverse problem was solved using iterative finite element calculations. A pre-strained circular actuator was built and activated with a predefined voltage. A three-dimensional finite element model of the circular actuator was created and the electromechanical activation process simulated. Simulation and actual measurements agree to a great extent, thus leading to a validation of both the constitutive model and the actuator simulation procedure proposed in this work.