Lattice structure capable of improving uniaxial compression stability

Abstract

The utility model discloses a lattice structure that can improve the stability of uniaxial compression, belongs to the technical field of structure design, and solves the problem of insufficient bearing capacity of the traditional lattice structure under uniaxial compression working condition. The lattice structure of the utility model discloses a lattice structure that can improve the stability of uniaxial compression, the minimum representative unit of the lattice structure is a lattice cell, the lattice cell includes a first frame, a second frame and a third frame, the first frame is a cubic frame, a single second frame is arranged in each face of the cubic frame of the first frame, and the third frame is arranged at the center of the cubic frame of the first frame. The lattice structure that can improve the stability of uniaxial compression provided by the utility model is favorable to solve the problems of bending instability, stress concentration of the rod and overall damage of the lattice structure caused by the fracture of the connecting rod of the lattice cell, and improves the compression strength.

Description

Technical Field

[0001] This utility model patent relates to the field of structural design technology, and in particular to a lattice structure that can improve uniaxial compression stability. Background Technology

[0002] With the increasing demand for structural performance optimization, lightweighting and multifunctional integration have become important development directions in engineering applications. Currently, ultralight porous structures have achieved widespread application driven by materials science and precision manufacturing technology, demonstrating great potential in functional-structural integration and attracting attention from many fields.

[0003] Lattice structural materials, macroscopic entities formed by the three-dimensional periodic arrangement of the smallest repeating units (i.e., lattice cells) representing the structural characteristics of a lattice, are currently a research hotspot in the field of ultralight porous structural materials. By optimizing the spatial configuration of lattice cells, it is possible to achieve lightweight, high-strength, excellent stiffness, and efficient energy absorption properties in lattice materials, which helps to significantly reduce structural weight while ensuring load-bearing performance. However, existing lattice cell designs mostly focus on the comprehensive mechanical properties of tension, compression, bending, and torsion, without fully considering the typical force mode of uniaxial compression. This leads to the tendency of such structures to buckle and become unstable under compression, resulting in insufficient overall stability and load-bearing efficiency, making them unsuitable for demanding engineering applications.

[0004] Therefore, there is an urgent need to develop a lattice structure that can improve the stability of uniaxial compression, specifically suitable for uniaxial compression conditions, in order to solve the problem that the existing lattice structure has poor stability and is prone to failure under compressive load. Summary of the Invention

[0005] Based on the above analysis, this utility model patent aims to provide a lattice structure that can improve uniaxial compression stability, so as to solve the problem of insufficient load-bearing capacity of lattice structures under uniaxial compression conditions in the prior art.

[0006] The purpose of this utility model patent is mainly achieved through the following technical solutions:

[0007] A lattice structure that can improve uniaxial compression stability includes three-dimensional periodically arranged lattice cells. The lattice cells include a first frame, a second frame and a third frame. The first frame is a cubic frame. Each face of the first cubic frame has a single second frame. The third frame is located at the center of the first cubic frame.

[0008] The first frame is a cubic frame formed by eight identical first support frames. The first support frame includes three first connecting rods and a triangular frame formed by three second connecting rods. The first end of each first connecting rod is located at a vertex of the triangular frame, and the second end is connected to the third frame.

[0009] Furthermore, each face of the first frame cube is provided with a second frame, and the second frame includes eight identical third links, one end of which is located at the center point of the face, and the other end is located at a vertex of the face.

[0010] Furthermore, the third link of the second frame in the adjacent face of the first frame cube is connected at a common vertex.

[0011] Furthermore, the third frame is located at the center of the cube of the first frame and includes 12 identical fourth links. One end of each fourth link is located at the center of the cube of the first frame, and the other end is connected to the second end of the first link.

[0012] Furthermore, the lattice cells are arrayed along the length, width, and height of the cube, and all the lattice cells are oriented in the same direction, forming a regularly shaped lattice structure.

[0013] Furthermore, the raw material for the lattice structure is AlMgScZr aluminum alloy powder.

[0014] Furthermore, the particle size range of the AlMgScZr alloy powder is 15–53 μm.

[0015] Compared with the prior art, this utility model patent can achieve at least one of the following beneficial effects:

[0016] (1) The lattice structure of this utility model patent that can improve uniaxial compression stability significantly enhances the stability and load-bearing capacity of the structure under uniaxial compression load through the coordinated design and interlocking of the first, second and third frames, effectively suppressing member buckling and overall instability.

[0017] (2) The lattice structure of this utility model patent can improve the uniaxial compression stability. Through the reasonable layout of multi-level frames and connecting rods, the stress transmission path is optimized and the stress concentration is reduced. While achieving lightweighting, the compressive strength and energy absorption performance of the structure are guaranteed.

[0018] In this utility model patent, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combinations. Other features and advantages of this utility model patent will be set forth in the following description, and some advantages will become apparent from the specification or be learned by practicing this utility model patent. The purpose and other advantages of this utility model patent can be realized and obtained through the content specifically pointed out in the text and drawings. Attached Figure Description

[0019] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this utility model patent. Throughout the drawings, the same reference numerals denote the same parts.

[0020] Figure 1 This is a schematic diagram of the lattice cell structure of the lattice structure that can improve uniaxial compression stability in Example 1;

[0021] Figure 2 This is a schematic diagram of the first frame of the lattice structure that can improve uniaxial compression stability in Example 1;

[0022] Figure 3 This is a schematic diagram of the first support frame of the lattice structure that can improve uniaxial compression stability in Example 1.

[0023] Figure 4 This is a schematic diagram of the second frame of the lattice structure that can improve uniaxial compression stability in Example 1;

[0024] Figure 5 This is a connection diagram between the second frame and the first frame of the lattice structure that can improve uniaxial compression stability in Example 1.

[0025] Figure 6 This is a schematic diagram of the third frame of the lattice structure that can improve uniaxial compression stability in Example 1.

[0026] Figure 7 This is a connection diagram of the second and third frames of the lattice structure that can improve uniaxial compression stability in Example 1.

[0027] Figure 8 This is a three-dimensional model diagram of the lattice structure that can improve uniaxial compression stability in Example 1;

[0028] Figure 9 This is a sample morphology diagram of a lattice structure that can improve uniaxial compression stability in Example 1;

[0029] Figure 10 This is a diagram showing the compressive stress-strain curve of the lattice structure in Example 1 that can improve uniaxial compressive stability.

[0030] Figure 11 This is a comparison of the quasi-static compressive strength of the lattice structure that improves uniaxial compressive stability in Example 1 and the lattice structure composed of traditional cells.

[0031] Figure label:

[0032] 1-Lattice cell; 11-First frame; 111-First support frame; 1111-First link; 1112-Triangular frame; 1112A-Second link; 12-Second frame; 121-Third link; 13-Third frame; 131-Fourth link. Detailed Implementation

[0033] This embodiment discloses a lattice structure that can improve uniaxial compression stability, made of AlMgScZr aluminum alloy. See also Figure 1 The lattice structure consists of multiple lattice cells 1 arranged in a three-dimensional array. Each lattice cell 1 includes a first frame 11, a second frame 12, and a third frame 13. The three frames are interconnected by linkages. The first frame 11 is a cubic frame, with a single second frame 12 located on each face of the cubic first frame 11. The third frame 13 is located at the center of the cubic first frame 11. The specific configuration of the lattice cells 1 determines the macroscopic mechanical properties of the structure. Operators can adjust the number and array period of the lattice cells 1 according to the load-bearing and space requirements of the actual engineering application. The lattice cells 1 are regular cubic shapes, with a single cell side length ranging from 2.5 to 20 mm. A 10 mm side length cell is preferred for bearing uniaxial compressive loads.

[0034] See Figure 2 The first frame 11 is cubic in shape, with a second frame 12 located within each cubic face. The first frame 11 includes eight identical first support frames 111. See also Figure 3 Each first support frame 111 is located at a vertex of the cube, forming a cube frame. The first support frame 111 includes three first connecting rods 1111 and a triangular frame 1112 formed by three second connecting rods 1112A. The first end of each first connecting rod 1111 is located at a vertex of the triangular frame 1112, and the second end is connected to the third frame 13.

[0035] See Figure 4 Each face of the first frame 11 cube has a second frame 12. (See also...) Figure 5 The second frame 12 includes eight identical third links 121, one end of which is located at the center point of the face on which it is located, and the other end is located at a vertex of the face. See also Figure 6 The third link 121 of the second frame 12 on the adjacent face of the cube is connected at a common vertex, and the node of the second frame 12 is connected to the vertex of the triangle 1112 of the first frame 11.

[0036] See Figure 6 , Figure 7 The third frame 13 is located at the center of the cube of the first frame 11 and includes twelve identical fourth links 131. One end of the fourth link 131 is located at the center of the cube of the first frame 11, and the other end is connected to the second end of the first link 1111.

[0037] See Figure 8 The lattice cells 1 are periodically arranged along the length, width, and height of the cube, and all lattice cells 1 are oriented in the same direction to form a macroscopically regular lattice structure.

[0038] Figure 9This is a lattice structure sample with AlMgScZr aluminum alloy as the matrix material, prepared using selective laser melting (SLM). This multi-cell composite structure can uniformly distribute uniaxial compressive loads, exhibiting not only excellent load-bearing capacity but also significant lightweight advantages. Quasi-static compressive performance tests were performed on this lattice structure, and the structure collapsed under compressive load. Figure 10 The stress-strain curve for the lattice structure in this embodiment is shown. The first peak stress (maximum bearing capacity) on the curve is the quasi-static compressive strength of the structure. In this embodiment, this value is 45.3 MPa, with a relative density of only 0.21 and an apparent density of 0.58 g / cm³. 3 .

[0039] Figure 11 The quasi-static compressive strength of the lattice structure of this embodiment was compared with that of lattice structures composed of cells in the shapes of traditional dodecahedrons, tetrahedrons, and truncated cubes. It can be seen that the novel lattice cell structure provided by this utility model patent outperforms the traditional configurations in terms of quasi-static compressive strength.

[0040] The above description is only a preferred embodiment of this utility model patent, but the scope of protection of this utility model patent is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model patent should be included within the scope of protection of this utility model patent.

Claims

1. A lattice structure that can improve uniaxial compression stability, characterized in that, It includes multiple three-dimensional periodically arranged lattice cells (1). The lattice cell (1) includes a first frame (11), a second frame (12) and a third frame (13). The first frame (11) is a cubic frame. Each face of the first frame (11) cubic frame has a single second frame (12). The third frame (13) is located at the center of the first frame (11) cubic frame. The first frame (11) is a cubic frame formed by eight identical first support frames (111). The first support frame (111) includes three first connecting rods (1111) and a triangular frame (1112) formed by three second connecting rods (1112A). The first end of each first connecting rod (1111) is located at a vertex of the triangular frame (1112), and the second end is connected to the third frame (13).

2. The lattice structure for improving uniaxial compression stability according to claim 1, characterized in that, The first frame (11) cube has a second frame (12) in each face. The second frame (12) includes 8 identical third links (121). One end of the third link (121) is located at the center point of the face, and the other end is located at a vertex of the face.

3. The lattice structure for improving uniaxial compression stability according to claim 2, characterized in that, The third link (121) of the second frame (12) in the adjacent face of the first frame (11) cube is connected at a common vertex.

4. The lattice structure for improving uniaxial compression stability according to claim 3, characterized in that, The third frame (13) is located at the center of the cube of the first frame (11) and includes 12 identical fourth links (131). One end of the fourth link (131) is located at the center of the cube of the first frame (11), and the other end is connected to the second end of the first link (1111).

5. The lattice structure for improving uniaxial compression stability according to claim 4, characterized in that, The lattice cells (1) are arrayed along the length, width and height of the cube, and all the lattice cells (1) are in the same direction, forming a regular lattice structure.

6. The lattice structure for improving uniaxial compression stability according to claim 5, characterized in that, The raw material for the lattice structure is AlMgScZr aluminum alloy powder.

7. The lattice structure for improving uniaxial compression stability according to claim 6, characterized in that, The particle size range of AlMgScZr alloy powder is 15–53 μm.

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