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

离子电活性聚合物建模 - 热-电化学-机械耦合效应和有限元离散化的一致公式

• 批准号: 257128106
• 负责人: Professor Dr.-Ing. Joachim Bluhm
• 金额: --
• 依托单位: Institut für Mechanik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/257128106?language=en
• 关键词: Modeling; Ionic; Electroactive; Polymers; Consistent

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.

电活性聚合物(EAP)等多功能材料属于智能材料的范畴。这些材料可以由于外部影响和/或主动能量供应而改变其性能。受生物系统行为的启发，考虑到在工程、材料科学和医学中的新应用，开发和制造EAP是一个国际研究课题，其目的是开发一个基于连续介质的描述离子(湿)EAP行为的模型及其算法实现。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EAP的变形是由电场触发的阴离子和阳离子的运动(扩散)驱动的。离子型EAP的优点是只需要几伏的电压就可以启动，缺点是它们必须保持潮湿。对于这些由固体(聚合物基质)、液体、气体(蒸汽)和离子组成的多相材料的行为的连续介质力学描述，将使用多孔介质理论。考虑到离子EAP中的电和热-化学-机械耦合效应，我们将考虑电动力学平衡方程。应能够根据聚合物基质的湿度预测离子EAP的有效消融模式。