文章基本信息

标题：Analytical Modeling of Clamped Dielectric Elastomer Strip Membranes Exhibiting Necking Effect
本地全文：下载
作者：Gianluca Rizzello ; Philipp Loew ; David Naso 等
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2018
卷号：51
期号：2
页码：701-706
DOI：10.1016/j.ifacol.2018.03.119
语种：English
出版社：Elsevier
摘要：AbstractDielectric elastomer (DE) strip membranes permit to design mechatronic transducers enabling large-strain, low-energy consumption, and compactness. To optimize the design of strip DE actuators by means of software tools, as well as to synthesize accurate control algorithms, analytical models have to be developed. Modeling of strip DE membranes clamped at both ends, having a nearly unitary aspect ratio (i.e., the ratio between the membrane length and width), turns out to be a particularly challenging task. In fact, such membranes are affected by necking and inhomogeneous deformations. Those phenomena are difficult to be described via analytical models, making it necessary to rely on computationally involved finite element tools. In this paper, we develop a modeling framework which permits to describe behavior of clamped DE strips in an analytical fashion. The model is based on an anisotropic free-energy function, which allows to map the effects of the clamping into the material behavior. A comparison between analytical and finite element models is presented for membranes having different aspect ratios, both in simulation and experimental case of studies, showing a remarkable agreement.
关键词：KeywordsSmart MaterialsDielectric ElastomerDEMembrane ActuatorLumped ModelFree-EnergyInhomogeneitiesNecking