Recoverable six-way buffer energy-absorbing metamaterial and design method thereof

Abstract

The invention discloses a recoverable six-way buffer energy-absorbing metamaterial and a design method thereof, and relates to the technical field of metamaterials. The recoverable six-way buffer energy-absorbing metamaterial comprises a multi-cell metamaterial structure formed by periodically arranging a plurality of unit cells, wherein each unit cell is composed of a cuboid frame and a crossed curved beam, the cuboid frame is composed of 10 straight beams, the crossed curved beam is composed of two curved beams, six sets of crossed curved beams are installed in six surfaces of the cuboid frame, the ends of the crossed curved beams are fixedly connected with the cuboid frame, the bending directions of the crossed curved beams arranged on the opposite surfaces of the cuboid frame are consistent, the middle parts of the crossed curved beams in different unit cells are connected together through connecting rods, and the multiple unit cells are periodically arranged to form the multi-cellmetamaterial structure. The metamaterial is formed by periodically arranging the unit cells, the mechanical properties of the metamaterial in all directions can be adjusted by compiling the mechanical properties of the crossed curved beams in the unit cells, and the metamaterial is wide in application range, easy to machine, capable of being directly manufactured through the 3D printing technology and convenient to apply and popularize on a large scale.

Description

technical field [0001] The invention relates to the technical field of metamaterials, in particular to a recoverable six-way cushioning energy-absorbing metamaterial and a design method thereof. Background technique [0002] "Metamaterials" refer to composite materials that have artificially designed structures and exhibit extraordinary physical properties that natural materials do not have. "Metamaterials" are a class of new materials that have emerged since the 21st century. They have special properties that natural materials do not have, and these properties are mainly derived from artificial special structures. Through the orderly design of the structure on the key physical scale of the material, the limitations of some natural laws can be broken through, so as to obtain supernormal materials beyond the inherent properties of nature. [0003] Most of the existing energy-absorbing structure designs use the plastic deformation of structural materials to achieve good energ...

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Problems solved by technology

[0003] Most of the existing energy-absorbing structure designs use the plastic deformation of structural materials to achieve good energy-absorbing effects (such as honeycomb structural materials, automobile anti-collision beams, etc.), but these structural materials do not have the characteristics of reusability. After an impact, the structural material must be replaced to cope with the next impact condition

In addition, the design of the mechanical device can also achieve a better buffering effect. For example, a retractable automobile collision buffer energy-absorbing device described in patent CN2016204327055 mainly uses the deformation of the damping spring to realize the absorption of impact energy, but the The buffer energy-absorbing device can basically only realize uniaxial buffering, and there are many parts and complex structure, which makes the processing more difficult and is not easy to be widely used

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