Shape optimization of material inclusions in dielectric elastomer composites
Shape optimization of material inclusions in dielectric elastomer composites
复制标题
介电弹性体复合材料中材料夹杂物的形状优化
DOI：
10.1007/s00419-019-01540-1
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发表时间：
2019
影响因子：
2.8
通讯作者：
R. Müller
中科院分区：
文献类型：
--
作者：
Markus Klassen;Sven Klinkel;R. Müller
近年来，介电弹性体成为驱动技术领域的新替代品。由于这些材料的柔软性，它们可以在施加电场的情况下在有限应变范围内变形。由于相对介电常数较低，机电耦合较弱，这使得需要 20-30 MV/m 范围内的大电场才能实现大型驱动目的。为了克服这一缺陷，近年来提出了由具有陶瓷夹杂物的弹性体基体组成的复合材料。目前的工作旨在通过三种夹杂物几何形状的数值比较来分析复合材料的压缩变形。结果显示了关于夹杂物形状的优化可能性，其允许在较低的施加电场下产生更大的介电弹性体变形。
In recent years, dielectric elastomers became a new alternative in the field of actuation technology. Because of the softness of these materials, they can be deformed in a finite strain regime under the application of electric fields. Due to the low relative permittivity, the electromechanical coupling is weak which makes large electric fields in the range of 20–30 MV/m necessary for large actuation purposes. To overcome this handicap, composite materials consisting of an elastomer matrix with ceramic inclusion have been proposed in the last years. The present work aims at an analysis of the compressive deformation of the composite by a numerical comparison of three inclusion geometries. The results show optimization possibilities regarding the shape of the inclusion which allow for larger dielectric elastomer deformations at lower applied electric fields.