Total Internal Reflection(TIR)Behavior of Heterogeneous Interface Shear Waves in Layered Soft Structure  

作　　者：Ming Zhao Wentao Jiang Qingyuan Wang Ying Liang Haidong Fan Xiaobao Tian 

机构地区：[1]MOE Key Laboratory of Deep Earth Science and Engineering,College of Architecture and Environment,Sichuan University,Chengdu,610065,China [2]Department of Mechanics and Engineering,Sichuan University,Chengdu,610065,China

出　　处：《Acta Mechanica Solida Sinica》2024年第5期662-672,共11页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.12372154);National Science and Technology Major Project(Grant No.J2019-III-0010-0054).

摘　　要：The total internal reflection(TIR)behavior of interface shear waves is crucial for ensuring the reliability of dielectric elastomer(DE)devices.However,due to the complex force-electric coupling and large deformation of DEs,the TIR behavior of shear waves in heterogeneous force-electric interface models is still unclear.This study modeled an elastic/DE bi-material interface to analyze the trajectory of out-of-plane shear waves.Employing Dorfmann and Ogden’s nonlinear electroelastic framework and the related linear small incremental motion theory,a method has been developed to control the TIR behavior of interface shear waves.It has been found that the TIR behavior is significantly influenced by the strain-stiffening effect induced by biasing fields.Consequently,a biasing field principle involving preset electric displacement and pre-stretch has been proposed for TIR occurrence.By controlling the pre-stretch and preset electric displacement,active regulation of TIR behavior can be achieved.These results suggest a potential method for achieving autonomous energy shielding to improve the reliability of DE devices.

关 键 词：Total internal reflection(TIR) Heterogeneous interface model Dielectric elastomers(DEs) Strain-stiffening 

分 类 号：O34[理学—固体力学]