A Flexibly Function-Oriented Assembly Mechanical Metamaterial

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.