Xu Rui, He Yulong, Chen Chuanqing, Sun Jiapeng, Li Xin, Lu Ming-Hui, Chen Yan-Feng
College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, P. R. China.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China.
Adv Sci (Weinh). 2025 May;12(19):e2501749. doi: 10.1002/advs.202501749. Epub 2025 Mar 24.
Multistable mechanical metamaterials have broad application prospects in various fields due to their unique configuration transformation ability, such as energy absorption, shape reconstruction, soft actuator design, mechanical storage, and logic operation. Currently, the steady-state transition mechanisms for most multistable mechanical metamaterials rely on translational displacement input, while the rotational input mechanisms are rarely studied. Here, a curved beam snap-fit structure is proposed to realize the multistable transition of metamaterials under rotational load. Their mechanical characteristics and influencing factors are discussed in detail through theoretical analysis, numerical simulation, and experimental verification. In addition, related rotational multistable mechanical metamaterials prototypes are designed. Their potential applications in the fields of energy absorption or robotics are demonstrated, which opens up new ideas and directions for the multifunctional applications of mechanical metamaterials.
多稳态机械超材料由于其独特的构型转变能力，在能量吸收、形状重构、软致动器设计、机械存储和逻辑运算等各个领域具有广阔的应用前景。目前，大多数多稳态机械超材料的稳态转变机制依赖于平移位移输入，而旋转输入机制很少被研究。在此，提出一种曲梁卡扣结构以实现超材料在旋转载荷下的多稳态转变。通过理论分析、数值模拟和实验验证详细讨论了其力学特性和影响因素。此外，设计了相关的旋转多稳态机械超材料原型。展示了它们在能量吸收或机器人领域的潜在应用，这为机械超材料的多功能应用开辟了新的思路和方向。
