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4D printing method of intelligent structure with large deformation function and product obtained through 4D printing method

An intelligent structure and large deformation technology, applied in the field of additive manufacturing, can solve problems such as difficult to meet mechanical properties and fatigue properties, products cannot respond in time, and limited application range, etc., to achieve light weight, simplify product design, and expand application range Effect

Active Publication Date: 2018-11-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing 4D printing technology, the forming process is limited by the complexity of the structure, it is not easy to meet the requirements of mechanical properties and fatigue properties, and the formed products cannot respond to the changing external environment in time, and the application range is limited

Method used

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  • 4D printing method of intelligent structure with large deformation function and product obtained through 4D printing method
  • 4D printing method of intelligent structure with large deformation function and product obtained through 4D printing method
  • 4D printing method of intelligent structure with large deformation function and product obtained through 4D printing method

Examples

Experimental program
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Embodiment 1

[0052] see figure 1 , this embodiment provides a 4D printing preparation method of a Cu-Al-Ni-based shape memory alloy intelligent deformation structure, the method comprising the following steps:

[0053] 1) First, design the initial configuration of the intelligent structure with large deformation function, and establish its computer three-dimensional model. Cu-Al-Ni series shape memory alloy is used as the material of the deformation matrix. Its structure is a gradient porous lattice structure with a porosity of 85%. Among them, the volume fraction of the unit topology in the proximal layer is 5%, and the units in the distal layer The volume fraction of the topology is 15%, the mesh type of the porous structure is rhombus, the diameter and wall thickness of the designed intelligent deformation structure unit cell, and the mesh type of the porous structure is rhombus;

[0054] 2) Using laser selective melting additive manufacturing technology as a shape memory alloy forming...

Embodiment 2

[0058] see figure 1 , this embodiment provides a 4D printing preparation method of a Cu-Zn-Al-based shape memory alloy intelligent deformation structure, the method comprising the following steps:

[0059] 1) First, design the initial configuration of the intelligent structure with large deformation function, and establish its computer three-dimensional model. Cu-Zn-Al series shape memory alloy is used as the material of the deformation matrix. Its structure is a gradient porous lattice structure with a porosity of 75%. Among them, the volume fraction of the unit topology in the proximal layer is 7.5%, and the unit topology in the distal layer is 7.5%. The volume fraction of the topology is 25%, the grid type of the porous structure is rhombus, the diameter and wall thickness of the designed intelligent deformation structure unit cell, and the grid type of the porous structure is rhombus;

[0060] 2) Using laser selective melting additive manufacturing technology as a shape m...

Embodiment 3

[0064] This embodiment provides a 4D printing preparation method of a Ni-Ti-based shape memory alloy intelligent deformation structure, the method comprising the following steps:

[0065] 1) First, design the initial configuration of the deformable structure with large deformation function, and establish its computer three-dimensional model. The shape memory alloy of Ni-Ti series is used as the material of the deformation matrix. Its structure is a gradient porous lattice structure with a porosity of 80%. Among them, the volume fraction of the unit topology in the proximal layer is 10%, and the unit topology in the distal layer is The volume fraction is 20%, the grid type of the porous structure is rhombus, the diameter and wall thickness of the designed intelligent deformation structure unit cell, the grid type of the porous structure is rhombus;

[0066] 2) Using laser selective melting additive manufacturing technology as a shape memory alloy forming method to print intelli...

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Abstract

The invention belongs to the field of additive manufacturing, and discloses a 4D printing method of an intelligent structure with a large deformation function and a product. The method comprises the following steps that (a) a three-dimensional structure of the intelligent structure to be printed is constructed, wherein the intelligent structure to be printed is of a porous gradient network structure, and comprises three layers with the volume fractions of pores sequentially reduced from top to bottom in the vertical direction; (b) a three-dimensional model of the intelligent structure is set up; (c) memory alloy powder is selected as raw materials, and the 3D printing technology is adopted for printing the three-dimensional model; and (d) the printed intelligent structure is subjected to heat preservation, cooling and external field irrigation, the deforming intelligent structure is obtained and subjected to performance testing, and the needed intelligent structure is selected according to performance needs. By means of the 4D printing method, the obtained product responds to the changing external environment immediately, the expectant optimal state is kept all the time, meanwhile,the 4D printing method is not limited by the structure complexity, and the requirements of the mechanical property and the fatigue property are met.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and more specifically relates to a 4D printing method and a product thereof of an intelligent structure with a large deformation function. Background technique [0002] Smart materials are a new type of functional materials that can perceive external stimuli, judge and process them appropriately, and can be executed by themselves. Smart materials are the fourth generation of materials following natural materials, synthetic polymer materials, and artificially designed materials. They are one of the important directions for the development of modern high-tech new materials. The boundaries between materials and structural materials are gradually disappearing, realizing functionalization of structures and diversification of functions. Generally speaking, smart materials have seven functions, namely sensing function, feedback function, information recognition and accumulation function, response ...

Claims

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Application Information

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IPC IPC(8): B22F3/11B22F3/24B22F1/00B33Y10/00B33Y80/00B33Y70/00
CPCB22F1/0003B22F3/1109B22F3/24B22F2999/00B33Y10/00B33Y70/00B33Y80/00B22F2207/17
Inventor 魏青松朱文志陈辉田健蔡超滕庆史玉升
Owner HUAZHONG UNIV OF SCI & TECH
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