Abstract

A novel multistable mechanical metamaterial showing highly tunable strength and energy absorption performance has been designed in this paper. A theoretical model is established to describe mechanical properties of the unit cell. The specimens of unit cells and metamaterials have been fabricated by fused deposition modeling additive manufacturing technology. Quasi-static compression and tensile experiments and the corresponding simulation analyses on these specimens are carried out. Results obtained from experiment and simulation methods demonstrate that mechanical properties of the presented bistable unit cell and multistable metamaterial can be tunable in a wide range with little change in total mass.

摘要

本文设计了一种具有高度可调强度和能量吸收性能的新型多稳态机械超材料。建立了一个理论模型来描述晶胞的力学性能。通过熔融沉积建模增材制造技术制造了单元电池和超材料的样品。对这些试样进行了准静态压缩和拉伸实验以及相应的模拟分析。从实验和模拟方法获得的结果表明，所提出的双稳态晶胞和多稳态超材料的机械性能可以在很宽的范围内进行调节，而总质量几乎没有变化。