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A Computer Graphics Recognition Technology and Three-dimensional Modeling Method for the Mesostructure of Composite Materials

A computer identification and composite material technology, applied in the field of computer graphics recognition technology and three-dimensional modeling of composite material mesostructure, can solve the problems of difficult and unstable identification of material components, reduce boundary point extraction errors and save time , the effect of reducing the boundary fitting error

Active Publication Date: 2019-02-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a computer graphics recognition technology and three-dimensional modeling method for the mesoscopic structure of composite materials, and proposes an improved computer automatic identification of material components for a 2.5D composite material The method is used to solve the problem of difficult and unstable identification of material components in the prior art

Method used

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  • A Computer Graphics Recognition Technology and Three-dimensional Modeling Method for the Mesostructure of Composite Materials
  • A Computer Graphics Recognition Technology and Three-dimensional Modeling Method for the Mesostructure of Composite Materials
  • A Computer Graphics Recognition Technology and Three-dimensional Modeling Method for the Mesostructure of Composite Materials

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Embodiment

[0055] A computer graphics recognition technology and a three-dimensional modeling method for a 2.5D composite material mesostructure, comprising the steps of:

[0056] Step 1: Using XCT technology to obtain slices of the internal structure of the 2.5D composite material. The length direction of the picture is the length direction of the material, and the out-of-plane direction of the picture is the axial direction of the weft yarn, such as figure 1 shown.

[0057] Step 2: Calculate the theoretical threshold m0 by using the outu threshold segmentation method, and compare the threshold segmentation effects adjacent to m. Such as figure 2 (a), (b), and (c) are binary images segmented by thresholds m0, m0+1, and m0+2 in turn, and the total number of corresponding independent small regions is 328, 196, and 228 in turn. It can be seen from the figure that after the threshold m0 is used for segmentation, there are more noise points in the picture, so the number of independent sm...

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Abstract

The invention discloses a computer pattern recognition technology for a microstructure of a composite material and a three-dimensional modeling method which are used for solving a problem that material components are difficult to be recognized and unstable in the prior art. The computer pattern recognition technology comprises the steps of acquiring a digital image of the internal structure of a 2.5D composite material by using an XCT technology; recognizing an independent base body portion by adopting a threshold segmentation method, and performing de-noising; respectively the left and the right of the independent base body region; pairing left and right base bodies by using the bilateral symmetry of the base bodies; for each group of paired base bodies, selecting appropriate upper and lower boundary points of the base bodies, and performing upper and lower boundary fitting, wherein an area between the upper and lower adjacent base bodies is a warp yarn area, and an area between the left and right paired base bodies with the base bodies being removed is a weft yarn area. The method disclosed by the invention can avoid manual intervention, and save a lot of manpower and time. Meanwhile, the invention further can build a three-dimensional model of the microstructure of the composite material so as to be used for further research and analysis.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a computer graphic recognition technology and a three-dimensional modeling method for the mesoscopic structure of composite materials. Background technique [0002] 2.5D fiber-reinforced composites are widely used in aerospace, military, energy and transportation due to their high specific modulus, high specific strength, strong anti-delamination ability and low processing cost. Therefore, it is very necessary to establish a 3D model of the mesostructure of 2.5D composite materials to study its mechanical properties and failure behavior. Material mesoscopic component identification is an important link in 3D modeling. Mesoscopic component identification is the process of using non-destructive testing methods to obtain digital graphics of the mesoscopic structure of materials, and using computer technology to identify each component material. [0003] Som...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/136G06T17/00
CPCG06T17/00
Inventor 高希光韩笑宋迎东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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