Modeling of Ionic Electroactive Polymers - Consistent Formulation of the thermo-electro-chemo-mechanical coupling effects and Finite-Element Discretization

电活性聚合物（EAPs）等多功能材料属于智能材料的范畴。这些材料可因外部影响和/或主动能源供应而改变其性质。受生物系统行为的启发，从工程、材料科学和医学的新应用角度出发，开发和制造eap是一个国际研究课题。该研究项目的目的是开发一个基于连续体的模型及其算法实现，用于描述离子（湿）eap的行为。这些材料由聚合物纤维网络组成，孔隙空间充满液体和气体。离子型eap的变形是由电场引发的阴离子和阳离子的运动（扩散）驱动的。离子eap的一个优点是只需要几伏特的电压来驱动，缺点是它们必须保持湿润。对于这些由固体（聚合物基体）、液体、气体（蒸汽）和离子组成的多相材料的连续力学行为描述，将使用多孔介质理论。考虑到离子eap的电耦合效应和热化学力学耦合效应，将考虑电动力学的平衡方程。有关离子型eap根据聚合物基质湿度的有效移动模式的预测将成为可能。

Multifunctional materials like Electroactive Polymers (EAPs) belong to the class of smart materials. These materials can change their properties due to external influences and/or active energy supply. Inspired by the behavior of biological systems, the development and manufacture of EAPs in view of new applications in engineering, material science and medicine is a subject of international research.The aim of the research project is the development of a continuum-based model and its algorithmic implementation for the description of the behavior of ionic (wet) EAPs. These materials consist of a network of polymer fibers, the pore space is filled with liquid and gas. The deformation of ionic EAPs is driven by the motion of anions and cations (diffusion) triggered by an electric field. An advantage of ionic EAPs is that only a few volts are needed for the actuation, the disadvantage is that they must be kept moist. For the continuum mechanical based description of the behavior of these multiphase materials, consisting of the phases solid (polymer matrix), liquid, gas (vapor) and ions, the Theory of Porous Media will be used. In view of the electro and thermo-chemomechanical coupling effects in ionic EAPs, the balance equations of electrodynamics will be considered. Predictions concerning an efficient mode of avtion of the ionic EAPs depending on the humidity of the polymer matrix shall be enabled.