Negative Poisson's Ratio Metamaterials and Design Methods Based on the Atomic Structure of Quantum Materials

Abstract

The application discloses a negative Poisson's ratio metamaterial based on the atomic structure of quantum materials and a design method thereof, which includes a plurality of periodically arranged and interconnected negative Poisson's ratio unit cell structures in three-dimensional space; The Poisson's ratio unit cell structure includes: planar hexagonal units, V-shaped units and straight bars; two planar hexagonal units are connected symmetrically through the first line segment, and connected between the two straight bars and the first line segment. In the middle, the axis of the straight bar coincides with the first line segment, and the four V-shaped units are connected to the two planar hexagonal units, which are connected in pairs and distributed symmetrically. The negative Poisson's ratio metamaterial based on the atomic structure of quantum materials provided by the present invention can maintain a constant negative Poisson's ratio in a large strain range, and exhibits a significant negative Poisson's ratio effect.

Description

technical field [0001] The invention relates to the field of mechanical metamaterial structure design, in particular to a negative Poisson's ratio metamaterial based on the atomic structure of quantum materials and a design method thereof. Background technique [0002] Poisson's ratio refers to the phenomenon that a material undergoes lateral deformation and is accompanied by longitudinal deformation. Materials with negative Poisson's ratio will expand and deform in the longitudinal direction when they are stretched in the transverse direction, so they can induce many abnormal mechanical properties that are different from the natural material properties, such as excellent shear resistance, fracture toughness, compression resistance. Resistance, surface isotropy and good buffering energy absorption performance. With these rich mechanical properties, negative Poisson's ratio materials have broad application prospects in the fields of textiles and clothing, engineering equipme...

AI Technical Summary

Problems solved by technology

However, most of the concave polygonal negative Poisson's ratio cell structures proposed earlier were inspired by the microscopic concave structures of foam materials and fiber materials, and a large number of negative Poisson's ratio cell structures that emerged later were largely derived from the above structures. made, with certain limitations

In fact, the existing negative Poisson's ratio cell structure types are still very limited, and the mechanical properties of the same cell structure are slightly different, and there are few structures to choose from in practical applications.

At the same time, most negative Poisson's ratio structures still face the disadvantage of negative Poisson's ratio degradation in a large strain range, which restricts their practical application range.

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