Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Design method for realizing ultra-high porosity structure based on extremely small curved surface

A technology of extremely small surfaces and design methods, applied in computer-aided design, calculation, computer material science, etc., can solve the problems of local stress concentration, structural failure, and the infeasibility of high-porosity structures

Pending Publication Date: 2022-04-12
SUZHOU UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The porosity of the composite TPMS structure obtained by this design method is less than 90%, and its structure is prone to local stress concentration under unidirectional compression loading conditions, thus causing premature failure of the structure
Some researchers also use the Delaunay triangulation method to design the 2D slice profile of the TPMS surface to construct multi-level holes, but if you want to achieve a higher porosity, it is difficult to maintain the continuity of the original surface
In addition, due to the limitations of the additive manufacturing technology itself, it is not feasible to obtain a high-porosity structure by reducing the wall thickness through a very small surface

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Design method for realizing ultra-high porosity structure based on extremely small curved surface
  • Design method for realizing ultra-high porosity structure based on extremely small curved surface
  • Design method for realizing ultra-high porosity structure based on extremely small curved surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment one side length is the cube model of 10mm

[0042] Step 1: In the 3D design software (such as matlab), determine the minimal surface as the Gyroid surface structure (such as the equation given by formula (1)), obtain the isosurface data, vertices and triangular patch data, within a single cycle, The unit size is 4 mm (unit cell size), and the number of collection points is 4 3 = 64 points (resolution), the unit cell model in a single cycle such as figure 2 As shown, the data is an STL file, and each direction requires 10 / 4=2.5 unit cells;

[0043] Step 2: Carry out the establishment of the target model, such as the cube model of 10×10×10 demonstrated in this embodiment, such as image 3 shown. Import the part structure data and the minimum surface data in a single cycle into the lattice design software (such as 3-matic), and the software reads the part data and the vertex and triangular surface data of the minimum surface; the part structure data is speci...

Embodiment 2

[0048] Embodiment 2 A cube model with a side length of 10mm

[0049] On the basis of Example 1, in a single design cycle, the unit size is 5 mm (unit cell size), and the rest remain unchanged. In magics, the given part volume is 12.970mm 3 , according to the formula (3), the porosity of the model is 98.7%, and it is printable based on the current 3D printing technology.

Embodiment 3

[0050] Embodiment three side length is the cube model of 10mm

[0051] On the basis of embodiment one, the number of design collection points is 8 3 =512 points (resolution), the rest remain unchanged, in magics, the given part volume is 37.858mm 3 , according to the formula (3), the porosity of the model is calculated to be 96.21%, and it is printable based on the current 3D printing technology.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Rod diameteraaaaaaaaaa
Volumeaaaaaaaaaa
Volumeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a design method for realizing an ultra-high porosity structure based on a minimum curved surface, which comprises the following steps of: determining the type of the minimum curved surface by utilizing three-dimensional design software to obtain minimum curved surface data in a single period; importing data of the part and the minimum curved surface in a single period into lattice design software, and reading data of vertexes and triangular patches of the part and the minimum curved surface; the edges of the triangular patches are extracted to serve as basic units for pore forming; and filling the part with the latticed extremely-small curved surface, converting the filled porous structure into an STL structure, and exporting the STL structure to complete the design of the ultra-high porosity structure based on the extremely-small curved surface. The ultra-porosity structure design is obtained on the basis of the extremely small curved surface, and the key for limiting the existing ultra-porosity structure design and manufacturing is achieved. According to the method, a three-dimensional model of a complex part with high porosity is obtained through mapping by designing an extremely-small curved surface unit cell structure, so that the three-dimensional model is expected to be formed through existing 3D printing, and a new thought for obtaining a high-porosity structure through an extremely-small curved surface structure is provided.

Description

technical field [0001] The invention relates to the technical fields of computer-aided design and additive manufacturing, in particular to a method for designing porous structures with extremely small curved surfaces and high porosity for additive manufacturing, which is suitable for the design and application of 3D printing structures such as metals, ceramics, and resins. Background technique [0002] In order to achieve the performance required for an ideal scaffold, the porous structure stands out, which has the characteristics of large specific surface area and low density, which can avoid problems such as stress shielding. At the same time, the surface of the porous structure can be modified or treated with cells, growth factors, etc. Filling of active substances. With the development of 3D printing, it is possible to break through the traditional design method based on subtractive manufacturing and realize lightweight design, manufacturing and application. With the he...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F30/10G16C60/00G06F113/10
Inventor 吕先林李文利邢占文刘卫卫
Owner SUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com