Using origami design principles to fold reprogrammable mechanical metamaterials
Using origami design principles to fold reprogrammable mechanical metamaterials
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DOI：
10.1126/science.1252876
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发表时间：
2014-08-08
期刊：
影响因子：
56.9
通讯作者：
Cohen, Itai
中科院分区：
文献类型：
--
作者：
Silverberg, Jesse L.;Evans, Arthur A.;Cohen, Itai
尽管折纸艺术因其美学品质而受到广泛推崇，但它现在也被认为是机械超材料设计的框架。通过使用Miura-ori镶嵌，我们发现这种折痕图案的每个单元格都是机械可折叠的，并且通过在状态之间切换，可以合理且可逆地调整整体结构的压缩模量。由于它们的相互作用，这些机械稳定的晶格缺陷也导致出现晶体结构，如空位，位错和晶界。这些结构中的每一个都来自可逆折叠的排列，突出了机械超材料和可编程物质之间的联系。鉴于折纸的无标度几何特征，这种超材料设计框架可以直接转移到毫米、微米和纳米尺寸系统。
Although broadly admired for its aesthetic qualities, the art of origami is now being recognized also as a framework for mechanical metamaterial design. Working with the Miura-ori tessellation, we find that each unit cell of this crease pattern is mechanically bistable, and by switching between states, the compressive modulus of the overall structure can be rationally and reversibly tuned. By virtue of their interactions, these mechanically stable lattice defects also lead to emergent crystallographic structures such as vacancies, dislocations, and grain boundaries. Each of these structures comes from an arrangement of reversible folds, highlighting a connection between mechanical metamaterials and programmable matter. Given origami's scale-free geometric character, this framework for metamaterial design can be directly transferred to milli-, micro-, and nanometer-size systems.