Photo-Activated Snap-Through of Nematic Shallow Spherical Shells  

作　　者：Yanli Lin Linghui He Renhuai Liu 

机构地区：[1]MOE Key Lab of Disaster and Control in Engineering,Institute of Applied Mechanics,Jinan University,Guangzhou 510632,China [2]CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China,Hefei 230026,China

出　　处：《Acta Mechanica Solida Sinica》2022年第2期239-247,共9页固体力学学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China(Grant No.11572308).

摘　　要：Photo-responsive nematic polymers can transduce light into mechanical work,but the rate is limited by the quasi-static deformation.To enhance the work output,a strat・egy of exploiting photo-triggered snap-through of glassy nematic shallow spherical shells with hemeotropic director alignment is examined here.The criterion for the nonlinear instability is derived analytically by using the modified iteration method.It is shown that,for thin shells of small height and large basal radius,snap-through can be caused by an incident light with moderate irradiation intensity.The phenomenon may inspire some new designs of contactless and ultra-fast actuation devices with high-rate output of mechanical work.

关 键 词：Nematic shell SNAP-THROUGH Ultra-fast actuation 

分 类 号：O34[理学—固体力学]