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Space lattice material based on curved bar base cells

A space lattice and cell technology, applied in building materials, building components, earthquake-proof and other directions, can solve the problems of difficulty in meeting, low impact energy absorption rate, poor impact deformation ability, etc., to expand the scope of application and improve the absorption rate. Effect

Active Publication Date: 2017-08-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rods of traditional lattice material cells are generally straight rods dominated by tension and compression, which have poor impact deformation ability and low impact energy absorption rate.
Moreover, the function of the material tends to be simplistic, and the properties such as strength and stiffness in all directions are relatively uniform, and it does not have the effect of functional gradient, so it is difficult to meet the demand for structural functional gradient in the current engineering field in some cases.

Method used

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  • Space lattice material based on curved bar base cells
  • Space lattice material based on curved bar base cells
  • Space lattice material based on curved bar base cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: as image 3 As shown, the curved rod of the cell is a steel member, and the cell is connected to the steel plate (5) through the outer node (4) of the cell after being extended in the z direction. The cell extension curved rods (1′) and (2′) in the figure are only for illustration, the cells can be extended along the x, y, z directions, and the number N of lattice material cells can be determined as required. The curvature of each group of curved rods in the cell changes according to a certain gradient in a certain direction, and the curvature of each group of curved rods in each cell along the x, y, z directions also changes according to a certain gradient, In this way, the stiffness (deformation characteristics) in different directions can be changed gradually. This structure can realize the impact resistance of the surface of the lattice material and the strong deformation and energy absorption function inside the lattice material.

Embodiment 2

[0031] Embodiment 2: as Figure 4 As shown, the curved rod of the cell is a steel member, and the cell is connected to the planar steel grid frame (6) through the outer node (4) of the cell after being extended in the z direction. The cell extension curved rods (1′) and (2′) in the figure are only for illustration, the cells can be extended along the x, y, z directions, and the number N of lattice material cells can be determined as required. The curvature of each group of curved rods in the cell changes according to a certain gradient in a certain direction, and the curvature of each group of curved rods in each cell along the x, y, z directions also changes according to a certain gradient, In this way, the stiffness (deformation characteristics) in different directions can be changed gradually. This structure can realize the smooth surface of the lattice material and the interior of the lattice material has a strong deformation and energy absorption function.

Embodiment 3

[0032] Embodiment 3: as Figure 5 As shown, the curved rod of the cell is a steel member, and the cell is extended in the z direction and connected with the planar steel grid frame (6) and the concrete slab (7) through the outer node (4) of the cell. The cell extension curved rods (1′) and (2′) in the figure are only for illustration, the cells can be extended along the x, y, z directions, and the number N of lattice material cells can be determined as required. The curvature of each group of curved rods in the cell changes according to a certain gradient in a certain direction, and the curvature of each group of curved rods in each cell along the x, y, z directions also changes according to a certain gradient, In this way, the stiffness (deformation characteristics) in different directions can be changed gradually. This structure can realize the impact resistance of the surface of the lattice material and the strong deformation and energy absorption function inside the latti...

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Abstract

The invention discloses a space lattice material based on curved bar base cells. The material comprises N base cells, each base cell is formed by connecting two sets of curved bars through a base cell inner node, every two adjacent base cells are connected through inter-base-cell nodes, and the three-dimensional space lattice material is formed through extension and expansion of the base cells in x, y and z directions. The curvatures of the both sets of curved bars in each base cell are different, and the curvatures of all the sets of curved bars in every two adjacent base cells in the x, y and z directions are also different, so that rigidity (deformation characteristic) of different directions is changed according to the required gradient. The space lattice material is small in weight and high in strength and has a large impacting deformation capacity and high impacting energy absorption rate, and the excellent impacting resistance characteristic is taken on; and the material is simple in structure, low in production cost, high in applicability and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of engineering structures, and in particular relates to a space lattice material based on curved rod cells. Background technique [0002] With the rapid development of engineering technology, engineers have put forward urgent requirements for lightweight structures and diversified functions. Ultralight porous materials are a new class of multifunctional materials that have emerged with the rapid development of material preparation and machining technology in recent years, and have the remarkable characteristics of structural and functional integration. [0003] The lattice material has high porosity, and the lattice structure can have the advantages of high specific strength, high specific stiffness, and high bending strength through the unit cell configuration design of the lattice material, so that under the same structural bearing capacity, it can save A large number of materials greatly reduce the weigh...

Claims

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Application Information

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IPC IPC(8): E04B1/19E04B1/98E04B1/02E04C1/40
CPCE04B1/02E04B1/19E04B1/98E04B2001/1978E04C1/40
Inventor 万水沈孔健年玉泽蒋正文宋爱明李夏元程宸周鹏
Owner SOUTHEAST UNIV
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