A metallic glass metamaterial with chiral microstructure

Abstract

The invention provides a metal glass metamaterial with a chiral microstructure. Traditional chiral structural design is applied to a metal glass material. The metal glass metamaterial comprises a cylinder made from the metal glass material and ligaments connected with the cylinder in a tangent mode. The overall mechanical property of the structure can be regulated and controlled by changing the number, the thickness, the length and the arranging mode of the ligaments and the radius of the cylinder. According to the metal glass metamaterial with the chiral microstructure, through perfect combination of the advantages of the chiral structure and the metal glass material, the mechanical properties of a traditional multi-hole material, chiral material and metal glass are greatly improved, the light effect and the negative Poisson ratio can be achieved, the metal glass metamaterial is high in elasticity and strength and large in plasticity, a large-scale metal glass metamaterial is expected to be prepared, and the metal glass metamaterial can be applied to the specific fields such as weight reduction and sound and energy absorption.

Description

technical field [0001] The invention relates to the technical field of metamaterials, in particular to a metallic glass metamaterial with a chiral microstructure. Background technique [0002] Porous structures are often used as structural protection materials and sandwich filling materials. Now they have been widely used in important fields such as aviation and aerospace, including the main and secondary load-bearing structural parts of some structures, such as wings, fuselages, empennages and radomes. and other parts. Compared with other traditional materials, the porous structure has the characteristics of low relative density and can reduce stress concentration. It can also obtain better special properties such as vibration reduction and heat insulation through the optimized design of the structure. When an ordinary porous structure is subjected to a load, the macroscopic deformation usually exhibits a positive Poisson's ratio characteristic, that is, in the direction p...

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Problems solved by technology

But at the same time, due to the lack of plastic deformation mechanisms such as slip planes and dislocations, metallic glasses have extremely poor plastic deformation ability at room temperature, and usually the tensile plastic strain is almost zero.

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