Rapid reconstruction method for microstructure of woven composite material based on topological characteristics

A technology of composite materials and mesostructure, applied in 2D image generation, image enhancement, image analysis, etc., can solve problems such as narrow application range, no consideration of weaving characteristics of woven structure fiber bundles, model errors, etc., and achieve wide application range , The reconstruction process is simple and fast, and the calculation cost is reduced

Active Publication Date: 2019-09-24
SHANGHAI UNIV
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Problems solved by technology

The scope of application of this method is relatively narrow, and it is not feasible for complex structures such as 3D orthogonal and 3D 4-directional braided structures; and the main body of its identification is the matrix, without considering the weaving characteristics of the fiber bundles of the braided structure, which can easily cause model errors

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
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  • Rapid reconstruction method for microstructure of woven composite material based on topological characteristics
  • Rapid reconstruction method for microstructure of woven composite material based on topological characteristics
  • Rapid reconstruction method for microstructure of woven composite material based on topological characteristics

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Embodiment

[0027] Such as figure 1 As shown, a method for rapid reconstruction of the mesostructure of braided composites based on topological features of the present invention, with Figure 2-2 The 2.5D weaving structure shown as an example includes the following steps:

[0028] 1) Prepare the sample: prepare a 2.5D composite material sample with dimensions (length x height x width: 8750.76x4304.5x11670μm) suitable for μCT testing;

[0029] 2) Parametric modeling of the mesoscopic structure of the woven body: the 2D structure is composed of warp fiber bundles and weft fiber bundles interweaving on the same plane, and the 2.5D structure is based on 2D, so that the weft fiber bundles and the two layers The fiber bundles in the warp direction are interwoven to form parallel multi-layer interweaving, and the ellipse is used as the fiber bundle section of the 2.5D model, and the parametric modeling is carried out according to the interweaving mode of the fiber bundles in the warp and weft d...

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Abstract

The invention discloses a rapid reconstruction method for a microstructure of a woven composite material based on topological characteristics. The method comprises the following steps: firstly, carrying out geometric modeling according to topological characteristics of a fiber bundle and a matrix in a woven composite structure, then identifying the topological characteristics based on a [mu]CT tomography sequence image, extracting a change rule of the characteristics, and finally, carrying out secondary reconstruction on a geometric model to complete the modeling of a mesoscopic structure. Compared with a structure modeling mode based on knitting process parameters, the goodness of fit between a reconstruction model and a real knitting structure is improved, and the accuracy of subsequently calculating the mechanical property of the material is improved. Compared with a method of directly performing structure reconstruction according to a [mu]CT image, the tedious point cloud data processing process is simplified, and the calculation cost is greatly reduced.

Description

technical field [0001] The invention relates to a fast reconstruction method of the mesoscopic structure of braided composite materials based on topological features. Background technique [0002] Three-dimensional braided composite material is a kind of composite material that uses weaving technology to weave warp, weft and normal fiber bundles into a whole, and has the characteristics of material and structure integration. Since the possible damage caused by secondary processing is eliminated, it not only has good physical and chemical properties such as high specific strength and specific stiffness of traditional composite materials, but also avoids the interlaminar shear damage of traditional composite laminates, greatly improving The reliability of the material also reduces the cost. Therefore, three-dimensional braided composite materials have extremely broad development prospects and are the mainstream materials for future aerospace development. [0003] With the de...

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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00G06T17/00
CPCG06T11/003G06T17/00G06T2211/416G06T11/006G06T2207/10081
Inventor 张丹袁经超李爱军
Owner SHANGHAI UNIV
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