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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Dielectric elastomers ： ウィキペディア英語版 Dielectric elastomers Dielectric elastomers (DEs) are smart material systems that produce large strains. They belong to the group of electroactive polymers (EAP). DE actuators (DEA) transform electric energy into mechanical work. They are lightweight and have a high elastic energy density. They have been investigated since the late 1990s. Many prototype applications exist. Every year, conferences are held in the US and Europe.〔(European conference )〕 == Working principles == A DEA is a compliant capacitor (see image), where a passive elastomer film is sandwiched between two compliant electrodes. When a voltage $U$ is applied, the electrostatic pressure $p\_$ arising from the Coulomb forces acts between the electrodes. The electrodes squeeze the elastomer film. The equivalent electromechanical pressure $p\_$ is twice the electrostatic pressure $p\_$ and is given by: $p\_=\backslash varepsilon\_0\backslash varepsilon\_r\backslash frac$ where $\backslash varepsilon\_0$ is the vacuum permittivity, $\backslash varepsilon\_r$ is the dielectric constant of the polymer and $z$ is the thickness of the elastomer film. Usually, strains of DEA are in the order of 10–35%, maximum values reach 300% (the acrylic elastomer VHB 4910, commercially available from 3M, which also sports a high elastic energy density and a high electrical breakdown strength.) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dielectric elastomers」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.