2.5-dimensional braided composite cell modeling method, system, equipment and medium

Abstract

The present invention discloses a 2.5-dimensional woven composite cell modeling method, system, device and medium, which relates to the field of three-dimensional modeling technology. It includes: obtaining a sample-level cell of a 2.5-dimensional woven composite material, and determining the size parameters, warp fiber bundle parameters and weft fiber bundle parameters of the sample-level cell; inputting the size parameters, warp fiber bundle parameters and weft fiber bundle parameters of the sample-level cell into the finite element software Abaqus to generate a sample-level cell model. The 2.5-dimensional woven composite sample-level cell model proposed by the present invention has the same microscopic woven structure characteristics as the real sample, can effectively simulate the stress-strain distribution of the surface and interior of the 2.5-dimensional woven composite material, and improves the accuracy and precision of the finite element simulation.

Description

Technical Field

[0001] The present invention relates to the technical field of three-dimensional modeling, and in particular to a 2.5-dimensional braided composite material cell modeling method, system, equipment and medium. Background Art

[0002] 2.5-dimensional braided composites have attracted much attention for their excellent in-plane and out-of-plane mechanical properties. The 2.5-dimensional braided interlocking structure improves the anti-delamination ability of the composites, but it will aggravate the stress and strain concentration and uneven distribution in the material. Due to the inherent periodic structural characteristics of braided composites, the mechanical properties of representative volume units or cells can be used to reflect the overall macroscopic mechanical properties of the composites.

[0003] In the prior art, the mesoscopic cell modeling of 2.5-dimensional braided composite materials mostly uses pre-processing modeling software, and then imports finite element software for numerical simulation analysis. The specific process includes: first clarify the braiding structure of the 2.5-dimensional braided composite material, and in the pre-processing modeling software, draw a two-dimensional sketch of the yarn according to the two-dimensional projection diagram of the braided structure. Import the two-dimensional sketch into the three-dimensional modeling environment, and use the software's stretching, rotation and other commands to convert the two-dimensional sketch into a three-dimensional basic model. On the three-dimensional basic model, according to the actual trajectory of the yarn, use the software's curve tool or sweep function to create a three-dimensional trajectory model of the yarn. Based on the yarn trajectory, use the software's section tool or Boolean operation function to create a cross-sectional model of the yarn. After the yarn model is constructed, create a matrix model, combine the yarn model and the matrix model to form a complete mesoscopic cell model.

[0004] The defects of the above-mentioned prior art are: the pre-processing modeling software uses rectangular units when dividing the grid, which cannot simulate the stress-strain distribution on the surface and inside of the 2.5-dimensional woven composite material, affecting the accuracy of the numerical simulation analysis results, resulting in the inability to effectively carry out parameter optimization design work. Summary of the invention

[0005] Based on this, it is necessary to provide a 2.5-dimensional woven composite cell modeling method, system, equipment and medium to address the above-mentioned technical problems.

[0006] The embodiment of the present invention provides a 2.5-dimensional braided composite material cell modeling method, comprising:

[0007] Obtaining a sample-level cell of a 2.5-dimensional woven composite material, and determining size parameters, warp fiber bundle parameters, and weft fiber bundle parameters of the sample-level cell;

[0008] The size parameters of the sample-level cell, the warp fiber bundle parameters, and the weft fiber bundle parameters are input into the finite element software Abaqus to generate a sample-level cell model; generating the sample-level cell model includes the following steps:

[0009] Determine the warp fiber bundle profile according to the warp fiber bundle parameters of the sample-level cell, and determine the weft fiber bundle profile according to the weft fiber bundle parameters of the sample-level cell;

[0010] Determine the warp fiber bundle sweep guide line according to the warp fiber bundle parameters of the sample-level cell, and move the warp fiber bundle sweep guide line to the warp fiber bundle contour by copying and translating operations in sequence;

[0011] Sweeping the warp fiber bundle sweeping guide line along the warp fiber bundle contour to obtain the warp fiber bundle surface; stretching the weft fiber bundle contour along the vertical direction of the contour to obtain the weft fiber bundle surface;

[0012] The BLOCK block is established according to the size parameters of the sample-level cell, and then the BLOCK block is divided by the surface of the warp fiber bundle and the surface of the weft fiber bundle to obtain the sample-level cell model of the 2.5-dimensional woven composite material.

[0013] In addition, the size parameters of the sample-level cells include: cell length Lx, cell thickness Ly, cell width Lz, fiber bundle Y-direction spacing Dy, and warp yarn curvature radius R;

[0014] The warp fiber bundle parameters of the sample-level cell include: the radius of the warp section circle WarpR, the distance between the center of the warp section circle WarpD, and the Z-direction spacing of the warp yarns Dz;

[0015] The weft fiber bundle parameters of the sample-level cell include: the semi-major axis of the weft cross section WeftL, the semi-minor axis of the weft cross section WeftS;

[0016] Among them, the Y direction is the direction along the Y axis in the three-dimensional coordinate system of the finite element software Abaqus, and the Z direction is the direction along the Z axis in the three-dimensional coordinate system of the finite element software Abaqus.

[0017] In addition, the warp fiber bundle profile is determined according to the warp fiber bundle parameters of the sample-level cell, which specifically includes:

[0018] Draw the first circle with the origin (0, 0, 0) of the three-dimensional coordinate system of the finite element software Abaqus as the center and (0, 0, the radius of the warp section circle WarpR) as a point on the circle;

[0019] Draw a second circle with point (0, 0, distance between the center of the warp section circle WarpD) as the center and (0, 0, distance between the center of the warp section circle WarpD + radius of the warp section circle WarpR) as a point on the circle;

[0020] Draw two common tangents between the first circle and the second circle, cut off the redundant arc segments, and obtain a racetrack-shaped warp fiber bundle cross section; copy and translate the racetrack-shaped warp fiber bundle cross section three times along the Y direction at the fiber bundle Y direction spacing Dy, and obtain four racetrack-shaped warp fiber bundle cross sections;

[0021] The four racetrack-shaped warp fiber bundle cross sections are sequentially copied and translated once with vectors (0, 2× fiber bundle Y-direction spacing Dy, warp yarn Z-direction spacing Dz) to obtain eight warp fiber bundle profiles;

[0022] The Y direction is the direction along the Y axis in the three-dimensional coordinate system of the finite element software Abaqus.

[0023] In addition, the weft fiber bundle profile is determined according to the weft fiber bundle parameters of the sample-level cell, which specifically includes:

[0024] Draw an ellipse with (0, fiber bundle Y-spacing Dy / 2, 0) as the center of the ellipse, (weft yarn section semi-major axis WeftL, fiber bundle Y-spacing Dy / 2, 0) as the endpoint of the ellipse major axis, and (0, fiber bundle Y-spacing Dy / 2 + weft yarn section semi-minor axis WeftS, 0) as the endpoint of the ellipse minor axis to obtain an elliptical weft fiber bundle section;

[0025] The elliptical weft fiber bundle cross section is copied and translated four times in sequence along the Y direction at a fiber bundle Y direction spacing Dy to obtain five elliptical weft fiber bundle cross sections;

[0026] The five elliptical weft fiber bundle cross sections are sequentially copied and translated twice with a cell length of Lx / 2 to obtain 15 elliptical weft fiber bundle cross sections;

[0027] Among the 15 elliptical weft fiber bundle cross sections, the parts of the elliptical weft fiber bundle cross section whose length is less than 0 and the parts of the elliptical weft fiber bundle cross section whose length is greater than the cell length Lx are cut and removed to obtain the weft fiber bundle contour;

[0028] The Y direction is the direction along the Y axis in the three-dimensional coordinate system of the finite element software Abaqus.

[0029] In addition, the warp fiber bundle sweeping guide line is made according to the warp fiber bundle parameters of the sample-level cell, which specifically includes:

[0030] Draw a third circle with point (cell length Lx / 2, 0, 0) as the center and (cell length Lx / 2 + warp curvature radius R, 0, 0) as a point on the circle;

[0031] Draw a fourth circle with point (0, 2× fiber bundle Y-distance Dy-2×warp yarn curvature radius R, 0) as the center and (0, 2× fiber bundle Y-distance Dy-warp yarn curvature radius R, 0) as a point on the circle;

[0032] Draw a fifth circle with point (cell length Lx, 2× fiber bundle Y spacing Dy-2× warp yarn curvature radius R, 0) as the center and (cell length Lx, 2× fiber bundle Y spacing Dy-warp yarn curvature radius R, 0) as a point on the circle;

[0033] The common tangent lines between the third circle and the fourth circle, and between the fourth circle and the fifth circle are respectively drawn, and the redundant arc segments are cut off to obtain the sweeping guide lines of the warp fiber bundles.

[0034] In addition, the 2.5-dimensional braided composite cell modeling system includes:

[0035] A cell acquisition module is used to acquire sample-level cells of a 2.5-dimensional woven composite material and determine size parameters, warp fiber bundle parameters, and weft fiber bundle parameters of the sample-level cells;

[0036] The model building module is used to input the size parameters of the sample-level cell, the warp fiber bundle parameters and the weft fiber bundle parameters into the finite element software Abaqus to generate a sample-level cell model; the model building module includes:

[0037] A profile construction unit, used to determine the profile of the warp fiber bundle according to the warp fiber bundle parameters of the sample-level cell, and to determine the profile of the weft fiber bundle according to the weft fiber bundle parameters of the sample-level cell;

[0038] A guide line construction unit is used to determine the warp fiber bundle sweeping guide line according to the warp fiber bundle parameters of the sample-level cell, and move the warp fiber bundle sweeping guide line to the warp fiber bundle contour through copying and translation operations in sequence;

[0039] A sweeping and stretching unit is used to sweep the warp fiber bundle sweeping guide line along the warp fiber bundle contour to obtain the warp fiber bundle surface; and to stretch the weft fiber bundle contour along the vertical direction of the contour to obtain the weft fiber bundle surface;

[0040] The segmentation unit is used to establish a BLOCK block according to the size parameters of the sample-level cell, and then segment the BLOCK block according to the warp fiber bundle contour and the weft fiber bundle contour to obtain a sample-level cell model of a 2.5-dimensional woven composite material.

[0041] In addition, a computer device includes a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of the above-mentioned 2.5-dimensional woven composite material cell modeling method are implemented.

[0042] In addition, a storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned 2.5-dimensional woven composite material cell modeling method.

[0043] Compared with the prior art, the above-mentioned 2.5-dimensional braided composite material cell modeling method, system, device and medium provided by the embodiments of the present invention have the following beneficial effects:

[0044] The present invention obtains key parameters of the sample-level cell including size parameters, warp fiber bundle parameters and weft fiber bundle parameters. Abaqus, as a powerful engineering simulation software, is capable of processing complex material models and boundary conditions. By inputting the key parameters of the sample-level cell into the finite element analysis software Abaqus, a sample-level cell model of a 2.5-dimensional woven composite material having the same mesoscopic woven structural characteristics as the real sample can be constructed. Compared with the prior art, the model can not only accurately reflect the structural characteristics of the material on a macroscopic scale, but also simulate the stress-strain distribution of the surface and interior of the 2.5-dimensional woven composite material on a mesoscopic scale, thereby improving the accuracy of the numerical simulation analysis results, and thus deeply understanding its mechanical properties and behavioral characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A flowchart of a 2.5-dimensional braided composite cell modeling method provided in one embodiment;

[0046] Figure 2 A schematic diagram of a cross-section of a racetrack-shaped warp fiber bundle of a 2.5-dimensional woven composite material cell modeling method provided in one embodiment;

[0047] Figure 3 A schematic diagram of a cross section of an elliptical weft fiber bundle in a 2.5-dimensional woven composite cell modeling method provided in one embodiment;

[0048] Figure 4 A schematic diagram of a cross-sectional profile of a weft fiber bundle of a 2.5-dimensional woven composite material cell modeling method provided in one embodiment;

[0049] Figure 5 A schematic diagram of sweep guide line modeling of a 2.5-dimensional braided composite material cell modeling method provided in one embodiment;

[0050] Figure 6 A schematic diagram of a sweep guide line of a 2.5-dimensional braided composite material cell modeling method provided in one embodiment;

[0051] Figure 7 A schematic diagram of a sweeping guide line cluster of a 2.5-dimensional braided composite material cell modeling method provided in one embodiment;

[0052] Figure 8 A schematic diagram of a wireframe structure of a 2.5-dimensional woven composite material cell modeling method provided in an embodiment. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0054] In one embodiment, a 2.5-dimensional braided composite cell modeling method is provided, such as Figure 1 As shown, the method includes:

[0055] Step 1 Obtain the sample-level cell of the 2.5-dimensional woven composite material, and determine the size parameters, warp fiber bundle parameters, and weft fiber bundle parameters of the sample-level cell. The size parameters of the sample-level cell include: cell length Lx, cell thickness Ly, cell width Lz, fiber bundle Y-direction spacing Dy, and warp curvature radius R. The warp fiber bundle parameters of the sample-level cell include: warp section circle radius WarpR, warp section circle center distance WarpD, and warp Z-direction spacing Dz. The weft fiber bundle parameters of the sample-level cell include: weft section semi-major axis WeftL, weft section semi-minor axis WeftS. Among them, the Y direction is the direction along the Y axis in the three-dimensional coordinate system of the finite element software Abaqus, and the Z direction is the direction along the Z axis in the three-dimensional coordinate system of the finite element software Abaqus.

[0056] Step 2 Input the size parameters, warp fiber bundle parameters and weft fiber bundle parameters of the sample-level cell into the finite element software Abaqus to generate a sample-level cell model; generating the sample-level cell model includes the following steps:

[0057] 2.1 Determine the warp fiber bundle profile according to the warp fiber bundle parameters of the sample-level cell:

[0058] The first circle is constructed with the origin (0, 0, 0) of the three-dimensional coordinate system of the finite element software Abaqus as the center and (0, 0, the radius of the warp section circle WarpR) as a point on the circle.

[0059] Draw a second circle with point (0, 0, distance between the center of the warp section circle WarpD) as the center and (0, 0, distance between the center of the warp section circle WarpD + radius of the warp section circle WarpR) as a point on the circle.

[0060] Draw two common tangents between the first circle and the second circle, cut off the redundant arc segments, and obtain a racetrack-shaped warp fiber bundle cross section; copy and translate the racetrack-shaped warp fiber bundle cross section three times along the Y direction with the fiber bundle Y direction spacing Dy in sequence to obtain four racetrack-shaped warp fiber bundle cross sections.

[0061] The four racetrack-shaped warp fiber bundle cross sections are copied and translated once with vectors (0, 2× fiber bundle Y-direction spacing Dy, warp yarn Z-direction spacing Dz) to obtain eight warp fiber bundle profiles, as shown in Figure 2 shown.

[0062] 2.2 Determine the weft fiber bundle profile according to the weft fiber bundle parameters of the sample-level cell:

[0063] Draw an ellipse with (0, fiber bundle Y-spacing Dy / 2, 0) as the center of the ellipse, (weft yarn section semi-major axis WeftL, fiber bundle Y-spacing Dy / 2, 0) as the end point of the ellipse major axis, and (0, fiber bundle Y-spacing Dy / 2 + weft yarn section semi-minor axis WeftS, 0) as the end point of the ellipse minor axis to obtain an elliptical weft fiber bundle cross section.

[0064] The elliptical weft fiber bundle cross section is copied and translated four times in sequence along the Y direction at a fiber bundle Y direction spacing Dy to obtain five elliptical weft fiber bundle cross sections.

[0065] The five elliptical weft fiber bundle cross sections are copied and translated twice with a cell length of Lx / 2 to obtain 15 elliptical weft fiber bundle cross sections, as shown in Figure 3 shown.

[0066] The elliptical weft fiber bundle cross sections with lengths less than 0 and with lengths greater than the cell length Lx are cut out of the 15 elliptical weft fiber bundle cross sections to obtain the weft fiber bundle profile, as shown in FIG. Figure 4 shown.

[0067] 2.3 Determine the sweeping guide line of the warp fiber bundle according to the warp fiber bundle parameters of the sample-level cell, such as Figure 5 As shown in the figure, the warp fiber bundle sweep guide lines are moved to the warp fiber bundle outline through copying and translating operations:

[0068] Draw the third circle with the point (cell length Lx / 2, 0, 0) as the center and (cell length Lx / 2 + warp curvature radius R, 0, 0) as a point on the circle. Draw the fourth circle with the point (0, 2× fiber bundle Y-spacing Dy-2× warp curvature radius R, 0) as the center and (0, 2× fiber bundle Y-spacing Dy-warp curvature radius R, 0) as a point on the circle. Draw the fifth circle with the point (cell length Lx, 2× fiber bundle Y-spacing Dy-2× warp curvature radius R, 0) as the center and (cell length Lx, 2× fiber bundle Y-spacing Dy-warp curvature radius R, 0) as a point on the circle. Draw the common tangents of the third circle and the fourth circle, and the fourth circle and the fifth circle respectively, cut off the redundant arc segments, and obtain the warp fiber bundle sweeping guide line, as shown below: Figure 6 As shown; the warp fiber bundle sweep guide line is moved to the warp fiber bundle contour by copying and translating operations in sequence, as shown Figure 7 shown.

[0069] 2.4 Sweep the warp fiber bundle sweeping guide line along the warp fiber bundle contour to obtain the warp fiber bundle surface; stretch the weft fiber bundle contour along the vertical direction of the contour to obtain the weft fiber bundle surface:

[0070] 2.5 According to the size parameters of the sample-level cell, a BLOCK block is established, and then the BLOCK block is divided by the surface of the warp fiber bundle and the surface of the weft fiber bundle to obtain the sample-level cell model of the 2.5-dimensional woven composite material, as shown in Figure 8 shown.

[0071] Based on the same inventive concept, the present invention also includes: extracting the APDL (ANSYS Parametric Design Language) command stream generated by the above modeling process, expressing the relevant modeling parameters in the command stream with the size parameters of the sample-level cell, and forming a parametric modeling method for the sample-level cell.

[0072] A 2.5-dimensional braided composite material cell modeling system provided in one embodiment includes:

[0073] The cell acquisition module is used to acquire the sample-level cells of the 2.5-dimensional woven composite material and determine the size parameters, warp fiber bundle parameters and weft fiber bundle parameters of the sample-level cells.

[0074] The model building module is used to input the size parameters of the sample-level cell, the warp fiber bundle parameters and the weft fiber bundle parameters into the finite element software Abaqus to generate a sample-level cell model; the model building module includes:

[0075] The contour construction unit is used to determine the warp fiber bundle contour according to the warp fiber bundle parameters of the sample level cell, and to determine the weft fiber bundle contour according to the weft fiber bundle parameters of the sample level cell.

[0076] The guide line construction unit is used to determine the warp fiber bundle sweeping guide line according to the warp fiber bundle parameters of the sample-level cell, and move the warp fiber bundle sweeping guide line to the warp fiber bundle contour through copying and translation operations in sequence.

[0077] The sweeping and stretching unit is used to sweep the warp fiber bundle sweeping guide line along the warp fiber bundle contour to obtain the warp fiber bundle surface; and to stretch the weft fiber bundle contour along the vertical direction of the contour to obtain the weft fiber bundle surface.

[0078] The segmentation unit is used to establish a BLOCK block according to the size parameters of the sample-level cell, and then segment the BLOCK block according to the warp fiber bundle contour and the weft fiber bundle contour to obtain a sample-level cell model of a 2.5-dimensional woven composite material.

[0079] A computer device is provided in one embodiment, including a memory and a processor. The memory stores a computer program, and the processor implements the steps of a 2.5-dimensional woven composite material cell modeling method when executing the computer program.

[0080] In one embodiment, a storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of a 2.5-dimensional woven composite material cell modeling method are implemented.

[0081] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A 2.5-dimensional braided composite cell modeling method, characterized in that: include: Obtaining a sample-level cell of a 2.5-dimensional woven composite material, and determining size parameters, warp fiber bundle parameters, and weft fiber bundle parameters of the sample-level cell; The size parameters of the sample-level cell include: cell length Lx, cell thickness Ly, cell width Lz, fiber bundle Y-direction spacing Dy and warp curvature radius R; the warp fiber bundle parameters of the sample-level cell include: warp section circle radius WarpR, warp section circle center distance WarpD, warp Z-direction spacing Dz; the weft fiber bundle parameters of the sample-level cell include: weft section semi-major axis WeftL, weft section semi-minor axis WeftS; wherein the Y direction is the direction along the Y axis in the three-dimensional coordinate system of the finite element software Abaqus, and the Z direction is the direction along the Z axis in the three-dimensional coordinate system of the finite element software Abaqus; The size parameters of the sample-level cell, the warp fiber bundle parameters, and the weft fiber bundle parameters are input into the finite element software Abaqus to generate a sample-level cell model; the generating of the sample-level cell model comprises the following steps: Determine the warp fiber bundle profile according to the warp fiber bundle parameters of the sample-level cell, and determine the weft fiber bundle profile according to the weft fiber bundle parameters of the sample-level cell; Determine the warp fiber bundle sweep guide line according to the warp fiber bundle parameters of the sample-level cell, and move the warp fiber bundle sweep guide line to the warp fiber bundle contour by copying and translating operations in sequence; Sweeping the warp fiber bundle sweeping guide line along the warp fiber bundle contour to obtain the warp fiber bundle surface; stretching the weft fiber bundle contour along the vertical direction of the contour to obtain the weft fiber bundle surface; According to the size parameters of the sample-level cell, a BLOCK block is established, and then the BLOCK block is divided by the surface of the warp fiber bundle and the surface of the weft fiber bundle to obtain a sample-level cell model of the 2.5-dimensional woven composite material. The step of determining the warp fiber bundle profile according to the warp fiber bundle parameters of the sample-level cell specifically includes: The first circle is constructed with the origin (0, 0, 0) of the three-dimensional coordinate system of the finite element software Abaqus as the center and (0, 0, the radius of the warp section circle WarpR) as a point on the circle; the second circle is constructed with the point (0, 0, the distance from the center of the warp section circle WarpD) as the center and (0, 0, the distance from the center of the warp section circle WarpD + the radius of the warp section circle WarpR) as a point on the circle; two common tangents are drawn between the first circle and the second circle, and the redundant arc segments are cut to obtain a runway-shaped warp fiber bundle cross section; the runway-shaped warp fiber bundle cross section is copied and translated three times along the Y direction with the fiber bundle Y direction spacing Dy in sequence to obtain four runway-shaped warp fiber bundle cross sections; the four runway-shaped warp fiber bundle cross sections are copied and translated once with the vector (0, 2×the fiber bundle Y direction spacing Dy, the warp Z direction spacing Dz) in sequence to obtain eight warp fiber bundle contours; The step of determining the weft fiber bundle profile according to the weft fiber bundle parameters of the sample-level cell specifically includes: An ellipse is drawn with (0, fiber bundle Y-spacing Dy / 2, 0) as the center of the ellipse, (the semi-major axis of the weft section WeftL, the fiber bundle Y-spacing Dy / 2, 0) as the endpoint of the major axis of the ellipse, and (0, the fiber bundle Y-spacing Dy / 2+the semi-minor axis of the weft section WeftS, 0) as the endpoint of the minor axis of the ellipse to obtain an elliptical weft fiber bundle section; the elliptical weft fiber bundle section is sequentially copied and translated 4 times along the Y direction with the fiber bundle Y-spacing Dy to obtain 5 elliptical weft fiber bundle sections; the 5 elliptical weft fiber bundle sections are sequentially copied and translated 2 times with the cell length Lx / 2 to obtain 15 elliptical weft fiber bundle sections; the parts of the elliptical weft fiber bundle section whose length is less than 0 and whose length is greater than the cell length Lx in the 15 elliptical weft fiber bundle sections are cut and removed to obtain the weft fiber bundle contour; The step of making a warp fiber bundle sweep guide line according to the warp fiber bundle parameters of the sample-level cell specifically includes: A third circle is drawn with the point (cell length Lx / 2, 0, 0) as the center and (cell length Lx / 2 + warp curvature radius R, 0, 0) as a point on the circle; a fourth circle is drawn with the point (0, 2× fiber bundle Y-spacing Dy-2× warp curvature radius R, 0) as the center and (0, 2× fiber bundle Y-spacing Dy-warp curvature radius R, 0) as a point on the circle; a fifth circle is drawn with the point (cell length Lx, 2× fiber bundle Y-spacing Dy-2× warp curvature radius R, 0) as the center and (cell length Lx, 2× fiber bundle Y-spacing Dy-warp curvature radius R, 0) as a point on the circle; common tangents are drawn between the third circle and the fourth circle, and between the fourth circle and the fifth circle, respectively, and redundant arc segments are cut off to obtain the warp fiber bundle sweeping guide line.

2. A 2.5-dimensional braided composite material cell modeling system based on the 2.5-dimensional braided composite material cell modeling method according to claim 1, characterized in that: include: A cell acquisition module is used to acquire sample-level cells of a 2.5-dimensional woven composite material and determine size parameters, warp fiber bundle parameters, and weft fiber bundle parameters of the sample-level cells; A model building module is used to input the size parameters of the sample-level cell, the warp fiber bundle parameters and the weft fiber bundle parameters into the finite element software Abaqus to generate a sample-level cell model; the model building module includes: A profile construction unit, used to determine the profile of the warp fiber bundle according to the warp fiber bundle parameters of the sample-level cell, and to determine the profile of the weft fiber bundle according to the weft fiber bundle parameters of the sample-level cell; A guide line construction unit is used to determine the warp fiber bundle sweeping guide line according to the warp fiber bundle parameters of the sample-level cell, and move the warp fiber bundle sweeping guide line to the warp fiber bundle contour through copying and translation operations in sequence; A sweeping and stretching unit is used to sweep the warp fiber bundle sweeping guide line along the warp fiber bundle contour to obtain the warp fiber bundle surface; and to stretch the weft fiber bundle contour along the vertical direction of the contour to obtain the weft fiber bundle surface; The segmentation unit is used to establish a BLOCK block according to the size parameters of the sample-level cell, and then segment the BLOCK block according to the warp fiber bundle contour and the weft fiber bundle contour to obtain a sample-level cell model of a 2.5-dimensional woven composite material.

3. A computer device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the computer program, the steps of the 2.5-dimensional woven composite material cell modeling method described in claim 1 are implemented.

4. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the 2.5-dimensional woven composite material cell modeling method described in claim 1 are implemented.

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