Design method for realizing ultra-high porosity structure based on extremely small curved surface
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
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
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
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 TPM
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
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
Property
Measurement
Unit
Rod diameter
aaaaa
aaaaa
Volume
aaaaa
aaaaa
Volume
aaaaa
aaaaa
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more