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Negative Poisson's ratio aluminum-based lattice structure and preparation method thereof

A technology with negative Poisson’s ratio and basic lattice, which is applied in processing and manufacturing, manufacturing tools, casting and molding equipment, etc., can solve the problems of low compactness, poor powder binding force, and many inclusions, and achieve the effect of diverse configurations

Inactive Publication Date: 2019-02-22
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0014] (1) Aiming at the problems of 3D printing light metal (aluminum, magnesium, etc.) structures such as low material density, many inclusions, and poor powder binding force, the present invention first uses 3D printing technology to obtain chemical activity, low melting point, good formability, High-strength non-metallic lattice model, and then through the preparation of soluble porous framework and liquid seepage technology, the aluminum-based lattice material consistent with the 3D printing model is obtained

Method used

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  • Negative Poisson's ratio aluminum-based lattice structure and preparation method thereof
  • Negative Poisson's ratio aluminum-based lattice structure and preparation method thereof
  • Negative Poisson's ratio aluminum-based lattice structure and preparation method thereof

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Embodiment Construction

[0036] See attached picture.

[0037] A negative Poisson's ratio aluminum-based lattice structure, characterized in that: one or more layers of unit cell structures are periodically arranged, the unit cell structure is an auxetic three-dimensional negative Poisson's ratio structure, and its The material adopts a negative Poisson’s ratio material, which is L3 industrial pure aluminum; the rod diameter of the rod element in the unit cell structure: 0.2mm-1.6mm; the rod length: 6mm; the rod / projection surface angle: 45°-75°; rod section shape: round; unit cell layer number: 3 layers; unit cell number per layer: 5.

[0038] The unit cell structure 1 includes two corresponding support end surfaces on the left and right sides, and the middle part of the two support end surfaces includes four end rod units 1-1, 1-2, 1-3, 1- 4. One end of the end rod units 1-1, 1-2, 1-3, and 1-4 intersects, and the other ends diverge outward and are inclined inwardly, and the ends of the adjacent end...

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Abstract

The invention discloses a negative Poisson's ratio aluminum-based lattice structure and a preparation method thereof. The negative Poisson's ratio aluminum-based lattice structure is formed by periodically arranging one or more layers of unit cell structures, the unit cell structures are of pull bulging type three-dimensional negative Poisson's ratio structures, the material is a negative Poisson's ratio material, the negative Poisson's ratio material is industrial pure aluminum or an aluminum alloy, and the unit cell structures are formed by connecting a plurality of horizontally-arranged andslantly-arranged rod units; and the diameter of the unit cell rod units is 0.5-5.0 mm, the length of the unit cell rod units is 0.5-15.0 mm, and the included angle between the slantly-arranged rod units and the projective planes of the rod units is 30-70 degrees; and CATIA software is adopted for modeling and design, a polymer material and a 3D printing technology are adopted for manufacturing amodel, a porous skeleton is made by soluble gypsum, and the aluminum-based negative Poisson's ratio lattice material is prepared by a positive pressure gas pressure percolation technology. The 3D printing and pressure percolation technologies are adopted to prepare the aluminum-based lattice structure in a combined manner; and the negative Poisson's ratio aluminum-based lattice structure which hasthe characteristics of small unit cells, thin rod elements, multiple layer levels, complex configuration and the like is achieved.

Description

Technical field: [0001] The invention relates to the technical field of negative Poisson's ratio lattice, and mainly relates to a negative Poisson's ratio aluminum-based lattice structure and a preparation method thereof. Background technique: [0002] Lattice material is an ordered porous material of spatial grid type composed of nodes and connecting rod units. Compared with traditional metal foam and metal honeycomb materials, metal lattice materials have higher specific strength, specific stiffness and energy absorption per unit mass, especially when the relative density is low, lattice materials have more outstanding quality Efficiency and performance advantages, it is currently recognized internationally as one of the most promising ultra-tough and lightweight structural materials. In addition to excellent mechanical properties, lattice materials can also be functionally designed through matrix regulation, configuration design, or pore filling to enable them to have fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D21/04B22C9/04B22D18/04B22D25/02B29C64/106B29C64/153B33Y10/00
CPCB22C9/043B22D18/04B22D21/04B22D25/02B29C64/106B29C64/153B33Y10/00Y02P10/25
Inventor 韩福生薛莹莹黄英杰王幸福赵莫迪
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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