仿生蜻蜓脉膜折纸结构的压缩性能研究  

Compression performance of a bionic origami structure based on the vein and membrane of dragonflies

作　　者：朱一然 张海鹏 翟思琦 李静[1] ZHU YiRan;ZHANG HaiPeng;ZHAI SiQi;LI Jing(College of Mechanical and Electrical Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)机电工程学院,青岛266580

出　　处：《中国科学：技术科学》2024年第4期678-689,共12页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:51975586)资助项目。

摘　　要：折纸结构具有折叠诱发的独特力学特性,在机器人、航空航天、材料科学等诸多工程领域有广泛的应用前景.基于膜结构设计的Kresling折纸承载能力小、折叠路径不稳定的不足,本研究利用蜻蜓脉膜的刚柔耦合结构进行仿生设计.以软质硅胶为膜、硬质树脂内嵌为脉,形成柔性软膜与刚性内嵌互相包被的二级刚柔耦合类Kresling折纸结构.该折纸结构具有变刚度特性,有优异的折叠特性和较高的折叠比.准静态压缩试验结果表明,有内嵌折纸结构折叠路径单一稳定,轴向压缩量与层间转角呈现单自由度结构的特征.相对于无内嵌折纸结构,刚性内嵌限制了峰折折痕的屈曲,可显著提升其力学性能,其中n=4的构型中有内嵌结构支反力极大值提高了60.87%.同时,其支反力具有迟滞性,折纸结构具有稳定的滞回耗能特性,在1000次加载-回复循环后仅下降3.60%,未发生显著降低.Origami structures possess unique mechanical properties induced by folding and have extensive application prospects in various engineering fields such as robotics,aerospace,and materials science.In this work,an origami structure based on the coupling rigid and flexible vein-membrane of the dragonfly was developed to improve the low load-carrying capacity and unstable folding path in the Kresling origami.Furthermore,the Kresling origami structure was fabricated using soft silicone gel as the membrane and embedded hard resin as the vein.The origami structure exhibits variable stiffness,excellent folding characteristics,and a high folding ratio.The quasistatic compression experiment results revealed that the origami structure with embedded resin has a single stable folding path,with a single degree of freedom between the axial compression and interlayer rotation angle.Compared with the origami structure without embedded resin,the buckling of mountain creases was limited by the rigid embedded resin,which can substantially improve the mechanical performance of the origami.For the origami structure with n=4,the maximum value of the reaction force increased by 60.87%,and the reaction force also exhibited hysteresis,highlighting the stable energy dissipation characteristic of the origami structure.Moreover,after 1000 loading-recovery cycles,the energy dissipation of the origami structure only decreased by 3.60%.

关 键 词：折纸 仿生 准静态压缩 变刚度 滞回耗能 

分 类 号：Q811[生物学—生物工程] TP242[自动化与计算机技术—检测技术与自动化装置]