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Multilayer lattice material structure

A material structure and lattice technology, used in medical science, prosthesis, tissue regeneration, etc., can solve the problems of model surface damage, waste of materials and processing time, etc., to achieve rapid processing, avoid stress shielding, and improve porosity. Effect

Active Publication Date: 2021-12-03
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the additive manufacturing process of structures with large cantilever angles, it is necessary to add a large number of supporting structural parts, resulting in waste of materials and processing time, and damage to the model surface.

Method used

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  • Multilayer lattice material structure
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  • Multilayer lattice material structure

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing:

[0020] Such as figure 1 As shown, the single unit cell structure provided by the present invention can be quickly processed and manufactured by additive manufacturing technology, and the unit cell includes 4 rods, 16 semicircular rods, and 4 1 / 4 round rods. The internal rod structure of the unit cell is formed by connecting the nodes (1)-(4) respectively, and the sides of the triangle are the projections of the internal rod structure of the unit cell in four lateral directions. The bottom surface of the square is composed of bottom rods on the sides of the triangle, and the diagonals are connected by rods to improve the compressive capacity of the structure. The rhombus top surface is composed of nodes (6)-(10) connected to each other. The connection between the unit cell and the unit cell is extended along the x direction through the triangular member plane formed by the...

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Abstract

The invention discloses a multilayer lattice material structure. The multilayer lattice material structure is formed by periodically arranging and stacking unit cell structures, and each of the unit cells is composed of a pyramid structure, four triangular side faces, a square bottom face and a rhombic top face. The single unit cell is replicated many times in the x direction and the y direction and then mirrored and replicated for a certain number of times in the z direction to obtain the multilayer lattice material structure. The multilayer lattice material structure disclosed by the invention can be quickly processed and manufactured through an additive manufacturing technology. The multilayer lattice material structure has certain strength to fulfill requirements of mechanical properties of human bearing bones. The elastic modulus of the lattice material structure can be adjusted according to the modulus required by human tissues, thereby avoiding stress shielding. The multilayer lattice material structure also has a certain permeability to provide adhesion, growth and proliferation spaces for cells. The multilayer lattice material structure can be used as a lightweight member and a bone scaffold in engineering fields of aerospace, transportation and tissue engineering.

Description

technical field [0001] The invention belongs to the technical field of engineering structures, and in particular relates to a multilayer lattice material structure in which unit cells are periodically arranged and stacked in a certain manner. Background technique [0002] As a new type of material integrating physical function and structure, lattice material has the characteristics of light weight, high specific strength, high specific stiffness, impact resistance, efficient heat dissipation, electromagnetic wave absorption and sound absorption effect. Lattice materials can be classified into multilayer lattice materials and interlayer lattice materials. The multi-layer lattice material is formed by periodic arrangement and stacking of unit cells; the upper and lower surfaces of the sandwich lattice material adopt solid panels, and only the lattice structure is introduced into the middle core layer. [0003] In recent years, additive manufacturing technology has been widely...

Claims

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Application Information

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IPC IPC(8): A61L27/50A61L27/56
CPCA61L27/50A61L27/56A61L2430/02Y02P10/25
Inventor 龙连春刘慧刘静毅孟传伟
Owner BEIJING UNIV OF TECH
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