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Large Curvature Folding Strategies of Butterfly Proboscis

摘要Due to its real-time control,high folding ratio,and structure self-locking,flexible large curvature self-folding devices have broad application prospects,such as foldable human implants,flexible electronics,and flexible robots.Driven by this background,flexible large curvature folding butterfly (Polyura eudamippus) proboscises were studied in this work.The folding ratio of the proboscises was about 15.The curvature of coiled proboscises ranged from about 150 m-1 to 880 m-1.The external and internal structures of the proboscises were studied by different methods.Three main strategies for large-curvature folding of proboscises were identified: a gradual decrease in thickness,a lower elastic modulus,and (most importantly) large numbers of regular corrugated cracks arranged on the surface.These corrugated cracks can effectively accommodate the coiled strain and provide space for the large curvature folding of proboscises.Finally,a 4D printed coiled sample with corrugated cracks was fabricated to mimic the proboscises stretching process.Large-curvature folding strategies,based on these proboscises,provide insights for the biomimetic design of artificial highly folded components.

作者 Daobing Chen ^[1] Honglie Song ^[2] Qingping Liu ^[3] Jie Gan ^[4] Yang Liu ^[5] Keyu Chen ^[5] Chong Wang ^[5] Shifeng Wen ^[5] Yan Zhou ^[4] Chunze Yan ^[5] Junqiu Zhang ^[3] Yusheng Shi ^[5] Zhiwu Han ^[3] 学术成果认领

作者单位 State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology,Wuhan 430074, China;The Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun 130022, China ^[1] Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100083, China;The Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun 130022, China ^[2] The Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun 130022, China ^[3] Faculty of Engineering, China University of Geosciences, Wuhan 430074, China ^[4] State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology,Wuhan 430074, China ^[5]

关键词 butterfly proboscis large curvature folding corrugated crack 4D printing bionic

DOI 10.1007/s42235-020-0089-1

发布时间 2020-12-22（万方平台首次上网日期，不代表论文的发表时间）

基金项目