Singh Nitin, van Hecke Martin
AMOLF, Science Park 104, 1098 XG Amsterdam, Netherlands.
Huygens-Kamerlingh Onnes Lab, Leiden University, PObox 9504, 2300 RA Leiden, Netherlands.
Phys Rev Lett. 2021 Jun 18;126(24):248002. doi: 10.1103/PhysRevLett.126.248002.
Mechanisms-collections of rigid elements coupled by perfect hinges which exhibit a zero-energy motion-motivate the design of a variety of mechanical metamaterials. We enlarge this design space by considering pseudo-mechanisms, collections of elastically coupled elements that exhibit motions with very low energy costs. We show that their geometric design generally is distinct from those of true mechanisms, thus opening up a large and virtually unexplored design space. We further extend this space by designing building blocks with bistable and tristable energy landscapes, realize these by 3D printing, and show how these form unit cells for multistable metamaterials.
由理想铰链连接的刚性元件集合构成的机构，其运动能量为零，这激发了多种机械超材料的设计灵感。我们通过考虑伪机构来扩大这一设计空间，伪机构是由弹性耦合元件组成的集合，其运动的能量成本非常低。我们表明，它们的几何设计通常与真正的机构不同，从而开辟了一个几乎未被探索的广阔设计空间。我们通过设计具有双稳态和三稳态能量态势的构建块进一步扩展这个空间，通过3D打印实现这些构建块，并展示它们如何形成多稳态超材料的单位晶格。
