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该文针对美国人工肌肉公司(Artificial Muscle Inc.)开发的一款电活性聚合物薄膜作动器,建立了该产品核心部件即上下表面附着有柔顺电极的圆环形电活性聚合物薄膜在力电作用下产生面外轴对称大变形的力学模型,利用热力学的基本理论,推导得到了圆环形薄膜在受力电载荷作用时产生面外大变形的控制方程,采用打靶法对控制方程进行了数值求解,结果表明:圆环形薄膜的变形是非常不均匀的,在靠近圆环中心处的薄膜变形较大,而靠近圆环边缘处的薄膜变形较小,导致薄膜中的电场从外向内逐渐变大。变形场的非均匀性导致薄膜内的大部分材料并没有被有效地利用,造成了材料的浪费。该文的研究结果对该商业化产品的优化设计具有实际的指导意义。
In this paper, a kind of electroactive polymer film actuator developed by Artificial Muscle Inc. was established. The core components of the product, ie, the ring-shaped electroactive polymer film with flexible electrodes adhered to the upper and lower surfaces, Under the action of electric force, the mechanical model with large deformation of the out-of-plane axis is generated. Based on the basic theory of thermodynamics, the governing equation of the large deformation of the circular ring film under the action of electric force is derived. The governing equation The numerical results show that the deformation of the annular film is very inhomogeneous, the deformation of the film near the center of the circle is larger and the deformation of the film near the edge of the circle is smaller, resulting in the electric field in the film from the outward Within gradually larger. The non-uniformity of the deformation field causes most of the materials in the film not to be effectively used, resulting in material waste. The research results of this paper have practical guiding significance for the optimal design of this commercial product.