Large-stroke snap-through instability in the axial direction of a bi-stable structure with high slenderness  

作　　者：Huan Zhoua Qian Sun Haibin Xia Yiwei Xiong Youchao Yuan Yin Huang Jianghong Yuan 

机构地区：[1]Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province,School of Mechanics and Aerospace Engineering,Southwest Jiaotong University,Chengdu 611756,China [2]Key Laboratory of Advanced Technologies of Materials,Ministry of Education,School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Theoretical & Applied Mechanics Letters》2025年第1期43-48,共6页力学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11972027,12472093,and 11772272);the New Interdisciplinary Cultivation Fund of Southwest Jiaotong University(Grant No.2682022JX001);the Frontier Science and Technology Cultivation Project of Southwest Jiaotong University(Grant No.2682022KJ048);the Laboratory of Flexible Electronics Technology at Tsinghua University.

摘　　要：Mechanical snap-through instability of bi-stable structures may find many practical applications such as state switching and energy transforming.Although there exist diverse bi-stable structures capable of snap-through instability,it is still difficult for a structure with high slenderness to undergo the axial snap-through instability with a large stroke.Here,an elastic structure with high slenderness is simply constructed by a finite number of identical,conventional bi-stable units with relatively low slenderness in series connection.For realizing the axial snap-through instability with a large stroke,common scissors mechanisms are further introduced as rigid constraints to guarantee the synchronous snap-through instability of these bi-stable units.The global feature of the large-stroke snap-through instability realized here is robust and even insusceptible to the local out-of-synchronization of individual units.The present design provides a simple and feasible way to achieve the large-stroke snap-through instability of slender structures,which is expected to be particularly useful for state switching and energy transforming in narrow spaces.

关 键 词：Synchronous instability Snap-through instability Bi-stability Large stroke High slenderness 

分 类 号：O343.9[理学—固体力学]