3D multi-component composite auxetic metamaterial based on additive manufacturing

Abstract

The invention discloses a 3D multi-component composite auxetic metamaterial based on additive manufacturing. The composite material comprises a 3D auxetic metamaterial, a polymer filling material and a square tube. A base material of the 3D auxetic metamaterial is industrial pure aluminum, a unit cell structure is in a concave honeycomb type, and the 3D auxetic metamaterial is obtained through an additive manufacturing and investment casting combined method. The polymer filling materials are epoxy resin and epoxy resin montmorillonite filling materials, and the square tube is a stainless steel square tube. According to the structural characteristics and the negative Poisson's ratio effect of the 3D auxetic metamaterial, the 3D multi-component composite auxetic metamaterial is obtained by filling two polymers inside and adding the stainless steel pipe outside to form internal and external constraint, and the structural utilization rate of the auxetic metamaterial is effectively increased. The 3D multi-component composite auxetic metamaterial obtained by the method and the process has excellent mechanical properties and energy absorption characteristics, effectively overcomes performance insufficiency caused by high porosity and bending deformation characteristics of the auxetic metamaterial, and provides a theoretical basis for performance optimization of the auxetic metamaterial.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a 3D multi-component composite auxetic metamaterial based on additive manufacturing. Background technique [0002] Auxetic metamaterials are a class of materials with a negative Poisson’s ratio effect. Because of their special negative Poisson’s ratio effect, they have more excellent mechanical and physical properties than traditional materials, including shear modulus, fracture toughness , high impact resistance and energy absorption capacity, indentation resistance and high damping, etc., and has broad application prospects in lightweight structures, vibration reduction and impact protection devices, sensors and medicine. As a new material integrating structure and function, it cleverly combines traditional materials in nature to realize material innovation design, fully taps the potential of materials, and provides a new direction and way for the development of materials and...

AI Technical Summary

Problems solved by technology

And the material deformation is mainly bending-dominant, that is, the negative Poisson's ratio effect is mainly realized through the bending and rotation of the rod, which further reduces the stiffness and strength of the material, which is very unfavorable for the practical application of the material.

Images