介电高弹体的力−电耦合循环变形和疲劳失效行为研究  

Review on electro-mechanically coupled cyclic deformation and fatigue failure behavior of dielectric elastomers

作　　者：康国政[1] 陈义甫[1] 黄伟洋 KANG Guozheng;CHEN Yifu;HUANG Weiyang(School of Mechanics and Aerospace Engineering,Southwest Jiaotong University,Chengdu 610031)

机构地区：[1]西南交通大学力学与航空航天学院,成都610031

出　　处：《力学进展》2023年第3期592-625,共34页Advances in Mechanics

基　　金：国家自然科学基金(11972312)资助项目.

摘　　要：介电高弹体的力−电耦合循环变形和疲劳失效行为目前在相关功能器件的设计和寿命评估中得到了越来越多的关注.因此,为了促进软体机器人等领域的发展,文章对介电高弹体的力−电耦合循环变形和疲劳失效行为的实验和理论研究现状进行了较为全面地综述:首先,对介电高弹体VHBTM材料在单一力场和力−电耦合作用下的循环变形行为及其演化特征进行了评述,重点总结了该材料在循环载荷作用下表现出的循环软化、棘轮行为和疲劳失效行为及其力−电耦合效应;然后,对已有的、描述介电高弹体单一力场和力−电耦合变形行为的本构模型进行综述,评述了已有的超弹性、黏−超弹性和黏−超弹性−塑性本构模型对介电高弹体循环变形行为及其力−电耦合效应的描述能力;最后,对介电高弹体的力−电耦合失效行为研究现状进行了评述,特别关注了介电高弹体在力−电耦合大变形作用下的低周疲劳失效行为.基于已有研究现状的评述,文章还对相关领域的未来研究方向进行了展望,力求促进相关研究领域的发展.The electro-mechanically coupled cyclic deformation and fatigue failure of dielectric elastomers(DEs)has attracted more and more attention in the design and life-assessment of related functional devices.Thus,to prompt the developments of soft robots and other related fields,the progress in the experimental and theoretical researches on the electro-mechanically coupled cyclic deformation and fatigue failure of DEs is reviewed in this work as follows:At first,the cyclic deformation and its evolution feature of DEs presented under the mechanical and electro-mechanically coupled loading conditions are summarized by specifically addressing the cyclic softening,ratchetting,fatigue failure and their electro-mechanical coupling effect;then,the existing constitutive models describing the mechanical and electro-mechanically coupled deformations of DEs are reviewed by discussing the capability of proposed hyperelastic,visco-hyperelastic and visco-hyperelastic-plastic constitutive models to reproduce the cyclic deformation of DEs and its electro-mechanical coupling effect;finally,the progress in the researches on the electro-mechanically coupled failure of DEs is outlined by addressing the low-cycle fatigue failure of DEs subjected to a kind of electro-mechanically coupled large deformation.Based on the comprehensive review on the existing literature,some topics are also recommended in this work for the future research,which are helpful to prompt the development of related fields concerning the DEs.

关 键 词：介电高弹体 力−电耦合 循环变形 本构模型 低周疲劳 

分 类 号：TB324[一般工业技术—材料科学与工程]