格子(音乐)
材料科学
凝聚态物理
班级(哲学)
吸收(声学)
光学
复合材料
物理
声学
计算机科学
人工智能
作者
Liang Meng,Jianxiong Shi,Chen Yang,Tong Gao,Yuliang Hou,Longlong Song,Dongdong Gu,Jihong Zhu,Piotr Breitkopf,Weihong Zhang
标识
DOI:10.1016/j.eml.2020.100869
摘要
Abstract Lightweight lattice structures and chiral metamaterials have both received extensive attention during the past decades. This work builds up a systematic design procedure for an emerging class of architected materials, achieving chirality and achirality under the same framework of parameterization. The design of the so-called ‘hyperbolic unit cell’ takes inspiration ultimately from the double-layered morphology of the fore-wing shells of flying beetles, being intended to replicate the hyperbolic geometric feature. The tessellation schemes that populate the microstructure to a component level are stirred up by the similarity with Euclidean tiling of convex regular polygons. Numerical and experimental studies revealed a wide variation of elastic constants for hyperbolic materials maintaining the same volume fraction, making more visible their applications under various loading scenarios, including compression, tension and shear. Also, a significant twisting effect, observed on the chiral cellular material, is shown to be advantageous in the design of buffering plates and energy-absorbing devices.
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