Open AccessNumerical study of the effective modulus of elasticity of three-dimensional mechanical metamaterial
Author(s) -
L. R. Akhmetshin
Publication year - 2020
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 - 10.1088/1742-6596/1611/1/012002
Subject(s) - metamaterial , modulus , materials science , young's modulus , twist , radius , composite material , elastic modulus , bulk modulus , elasticity (physics) , optics , geometry , physics , mathematics , optoelectronics , computer science , computer security
Metamaterials are of great interest due to their unusual properties and promising practical application. The paper studies a mechanical metamaterial bar composed of 81 unit cells. The unit cell is shaped to a cube the faces of which consist of two-dimensional tetrachiral elements. The elastic deformation of a metamaterial specimen is numerically modeled in uniaxial loading. How the twist angle and Young modulus of the metamaterial specimen depend on the parameters of the chiral structure is demonstrated. Value ranges of the parameters in which the twist angle is largely affected are found. Cell parameters that have the greatest and least influence on the metamaterial twist angle and Young’s modulus are determined. The effective Young’s modulus decreases by a factor of approx. 20 when changing the inner radius of the ring. An almost constant effective Young’s modulus is found.