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论文类型：期刊论文

发表时间：2020-04-01

发表刊物：APPLIED PHYSICS EXPRESS

收录刊物：SCIE

卷号：13

期号：4

ISSN号：1882-0778

关键字：Perforated mechanical metamaterials (PMMs); perforation layout; pore rotation; band-gaps; negative Poisson's ratio

摘要：We propose two types of perforation layout by introducing hole rotation based on regular configuration for effective band gap generation and mechanical properties improvement in low porosity. The design is characterized by redistribution of the substrate materials, and reduction connector thickness. Our analysis not only shows that the proposed layouts obtain broad and multiple band-gaps in low-frequency ranges and exhibit extreme Young's modulus variations, but also reveals how the reduction of connector thickness and geometric symmetry contribute to the unusual response. This study provides a perspective to design auxetic perforated metamaterials of low porosity with wide and low-frequency band gaps.