Open AccessAspect ratio and size effects of a metacomposite with interconnected Y-elements
Author(s) -
TeikCheng Lim
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2047/1/012029
Subject(s) - metamaterial , modulus , aspect ratio (aeronautics) , materials science , upper and lower bounds , young's modulus , composite material , mathematics , mathematical analysis , optoelectronics
An investigation on the size effect and aspect ratio is reported herein for a recently designed mechanical metamaterial that manifests perfect auxeticity based on inspiration from a Middle East geometrical pattern by interconnecting rigid Y-elements. An upper bound effective Young’s modulus was acquired by matching the strain energy of the restraining springs within each pair of the Y-elements and the conceptualised continuum strain energy of the entire metamaterial. Results show that the effective Young’s modulus is enhanced with decreasing size of the material. For a fixed amount of metamaterial units, the effective Young’s modulus can be increased by elongating or narrowing the metamaterial structure. This 2D structure is useful for applications which requires preservation of shape while permitting large change in size.