A Composite Structure with Negative Poisson's Ratio Effect

Abstract

The invention discloses a composite structure with negative Poisson's ratio effect, comprising corrugated plates and square tubes, the corrugated plates and square tubes are arranged to realize the negative Poisson's ratio effect of the overall structure. First, design the size of the corrugated plate, the size of the square tube and the overall size; secondly, select the material of the corrugated plate and the square tube according to the actual force requirements or application scenarios. There are no specific requirements for the square tube, and it can be stably connected with the corrugated board. Then, according to the connection sequence required by the design, select the appropriate connection method for connection. The available connections include: bonding, welding, riveting, etc. The assembled composite structure of the present invention has been proved to have strong novelty and practicability, and has variable stiffness characteristics while realizing the negative Poisson's ratio effect, and has great application potential in the fields of impact protection, aerospace and sensors.

Description

technical field [0001] The invention relates to a composite structure designed with a negative Poisson's ratio effect by assembling a corrugated plate and a square tube, and belongs to the field of new materials and new structures. Background technique [0002] Unlike most materials in nature, negative Poisson's ratio materials or structures contract under compression and expand under tension. This special mechanical behavior enables negative Poisson's ratio materials or structures to exhibit many desirable mechanical properties. Compared with positive Poisson's ratio materials, their shear bearing capacity, fracture resistance, energy absorption capacity, and sag resistance are all better than those of positive Poisson's ratio materials. There is a certain degree of improvement. These excellent mechanical properties also make negative Poisson's ratio materials and structures have great application potential in medical, aerospace, impact protection, sensors and other fields...

AI Technical Summary

Problems solved by technology

However, due to the complex topology of negative Poisson’s ratio structures, most of the existing negative Poisson’s ratio structures are based on high-cost manufacturing processes such as 3D printing technology, laser cutting technology

The high-cost manufacturing process also limits the promotion and practical application of negative Poisson's ratio structures, and reducing the manufacturing cost of negative Poisson's ratio structures has become a hot issue in the field

3D printing technology and laser cutting technology have relatively high requirements on the substrate, and the manufacturing size also has corresponding requirements. Therefore, most of the negative Poisson's ratio structures are still in the manufacture of smaller-sized components, and it is difficult to achieve negative Poisson's ratio. Application of structures in larger projects and fields

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