东南大学学报（英文版）2017，Vol.33Issue(4)：387-390,4.DOI:10.3969/j.issn.1003-7985.2017.04.001
圆形框架上的介电弹性体相变转换
Phase transitions of dielectric elastomers in a circular frame
摘要
Abstract
In order to imitate biological adhesion performance and skin properties,phase transitions on dielectric elastomers (DE) with high voltages are studied.The states of flat,wrinkled and bulging on the circular active area which is coated with electrodes verify the theoretical prediction of phase transitions and failure phenomena.When the DE membrane is subjected to a radial force and increasing voltage,four experimental phenomena are discovered before electric breakdown:The active region expands,and the thin membrane is still flat till breakdown;bulging forms instead of a flat area on the membrane;wrinkles and bulging coexist;and the active area is completely wrinkled.In the fourth state,there are two types of phase transitions between the flat and wrinkled regions in a membrane:Wrinkles form in small regions,and then propagate at the expense of the flat area until the entire active part becomes wrinkled;both the wrinkled and fiat regions move interchangeably on a membrane with ramping voltage till breakdown.It is found that when there is no prestretch of a DE membrane,bulging will occur with the increasing voltage.Wrinkles commonly appear at large prestretch and,therefore,the prestretched ratio significantly affects electromechanical phase transitions.关键词
相变转换/介电弹性体/褶皱/圆形框架Key words
phase transition/dielectric elastomer/wrinkle/circular frame分类
机械制造引用本文复制引用
张慧,张志胜..圆形框架上的介电弹性体相变转换[J].东南大学学报（英文版）,2017,33(4):387-390,4.基金项目
The National Natural Science Foundation of China No.51775108. （）
