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Unusually high ratio of shear modulus to Young's modulus in a nano-structured gyroid metamaterial.

ABSTRACT: Unlike the constant nature of elastic coefficients of isotropic bulk materials, the Young's (E) and shear (?) moduli of nano-structured (NS) gyroid metamaterials change with relative density (?), but at different rates depending on the cell size of the structure. These elastic behaviors displayed by E and ? cause crossover/inversion of these two moduli, such that ? of the NS gyroid metamaterials is greater than E for the structures with ??

SUBMITTER: Park JH

PROVIDER: S-EPMC5585398 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Unusually high ratio of shear modulus to Young's modulus in a nano-structured gyroid metamaterial.

Park Jun-Hyoung JH Lee Jae-Chul JC

Scientific reports 20170905 1

Unlike the constant nature of elastic coefficients of isotropic bulk materials, the Young's (E) and shear (μ) moduli of nano-structured (NS) gyroid metamaterials change with relative density (ρ), but at different rates depending on the cell size of the structure. These elastic behaviors displayed by E and μ cause crossover/inversion of these two moduli, such that μ of the NS gyroid metamaterials is greater than E for the structures with ρ < 0.23. This peculiar elastic behavior causes NS gyroid m ...[more]

PMID: 28874740

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