A Flexibly Function‐Oriented Assembly Mechanical Metamaterial

• Published in: Advanced functional materials Vol. 34; no. 32
• Main Authors: Yue, Chengbin, Zhao, Wei, Li, Fengfeng, Li, Bingxun, Liu, Liwu, Liu, Yanju, Leng, Jinsong
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc 01-08-2024
• Subjects: assembly mechanical metamaterials (AMMs); Combinatorial analysis; Encryption; Energy absorption; Energy dissipation; function‐oriented; Logic circuits; mechanical logic functions; Metamaterials; pattern encryption; Shape memory; Structural stability; Vibration
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.202316181

Based on the snap‐through instability, the pursuit for mechanical metamaterials with flexible functional applications and the ability to combine with information has been the Holy Grail for structural scientists. Here, the function/application‐oriented bistable unit motifs (UMs) are developed by an elaborately architectural design inspired by the hind leg of the frog in jumping, and a corresponding assembled strategy is proposed. Three functional applications derived from their progressive evolutions. The first is the construction of on‐demand assemblable mechanical curves, including multi‐stage vibration isolation, recoverable energy absorption, and energy dissipation along with integrated vibration isolation and energy dissipation characteristics. The second is the development of mechanic and temperature double pattern encryption strategy using bistability and shape memory programmability, resulting in 4n encryption and decryption modes for n‐bit encryption devices. Finally, five non‐volatile basic mechanical logic gates and a universal combinatorial half‐adder are built, affording guidance to unconventional computing devices with logic functions.
Inspired by the frog hind legs in the process of jumping, a new unit motif (UM) is developed, and the assembly strategy with ideal boundary conditions leveraging gear, bearing along with frames is proposed. Furthermore, three functional applications are derived from their progressive evolutions, including assembly mechanical metamaterials with function‐oriented mechanical properties, dual‐mode pattern encryption devices, and nonvolatile mechanical logic gates.