Simulation mechanical properties analysis method of multi-level carbon fiber reinforced composite materials

Abstract

The present invention is applicable to the technical field of fiber-reinforced composite materials and provides a method for analyzing the simulated mechanical properties of multi-stage carbon fiber-reinforced composite materials, comprising the following steps: modeling a continuous carbon fiber yarn framework and a three-dimensional needle-punched discontinuous long carbon fiber-reinforced polyetheretherketone composite material according to a preset structure; importing the model into Abaqus; defining the continuous carbon fiber yarn framework as a transversely isotropic material and assigning material mechanical parameters calculated using a bridging matrix method; defining the three-dimensional needle-punched discontinuous long carbon fiber-reinforced polyetheretherketone composite material as an isotropic material and assigning actual measured material mechanical parameters; assembling the two, dividing the grid, setting constraints, and applying stress; and calculating the results of the mechanical property simulation analysis. The present invention, for the first time, introduces the finite element analysis method into the static mechanical property analysis of multi-stage carbon fiber-reinforced polyetheretherketone composite materials, aiming to effectively analyze the stress distribution of composite materials with complex structures.

Description

Technical Field

[0001] The present invention belongs to the technical field of fiber reinforced composite materials, and in particular relates to a simulation mechanical property analysis method of multi-level carbon fiber reinforced composite materials. Background Art

[0002] Since its emergence, carbon fiber reinforced polyetheretherketone composites have received much attention and are increasingly used due to their excellent comprehensive properties, automated and efficient preparation, and clean and recyclable properties. Especially in semi-structural and engineering applications, they are an attractive alternative to metal parts.

[0003] Over the years, various methods have been developed for preparing carbon fiber-reinforced polyetheretherketone (PEEK) resin-based composites. Currently, the most widely used methods are short-fiber injection molding and unidirectional continuous fiber-reinforced prepregs. The former, due to fiber length limitations, does not provide ideal reinforcement in terms of performance. In practical applications, the latter requires redesigning the unidirectional ply structure of the unidirectionally reinforced composite material when the stress state is uncertain or requires similar stress states in all directions. However, laminates made with unidirectional continuous fibers are prone to interlaminar failure, significantly reducing their advantages and increasing the process and cost.

[0004] An existing biomimetic carbon fiber-reinforced polyetheretherketone (PEEK) composite material utilizes multi-stage carbon fiber reinforced polyetheretherketone (PEEK) resin, resulting in excellent mechanical properties. However, the forces and strains experienced by its components under stress remain unclear. Therefore, we propose a simulated mechanical performance analysis method for multi-stage carbon fiber-reinforced PEEK composites. This method simulates the stress, deformation, and displacement of the composite material under stress, further clarifying the stress transmission pathways within the composite. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for analyzing the simulated mechanical properties of multi-level carbon fiber reinforced composite materials, aiming to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The simulation mechanical property analysis method of multi-level carbon fiber reinforced composite material includes the following steps:

[0008] Step 1: Modeling a multi-stage carbon fiber reinforced polyetheretherketone based composite material according to a preset structure, that is, modeling a continuous carbon fiber yarn frame and a three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material;

[0009] The multi-stage carbon fiber reinforcement includes continuous carbon fiber yarn reinforcement and discontinuous long carbon fiber reinforcement; wherein each carbon fiber in the continuous carbon fiber yarn is uniformly wrapped by a polyetheretherketone resin that is melted and then cooled, and the carbon fiber yarn and the polyetheretherketone resin that wraps the carbon fiber yarn are regarded as a whole; the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone-based composite material is regarded as an isotropic homogeneous material;

[0010] Step 2: Import the established model into the finite element analysis software;

[0011] Step 3: Define the material type of the continuous carbon fiber yarn frame and assign the material mechanical parameters;

[0012] Step 4: define the material type of the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material and assign the material mechanical parameters;

[0013] Step 5: Assemble the continuous carbon fiber yarn frame and the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material, divide the grid, set constraints and apply stress;

[0014] Step 6: Calculate and obtain the simulation analysis results of the static mechanical properties of the multi-stage carbon fiber reinforced polyetheretherketone based composite material.

[0015] Furthermore, the specific operation of step one is: according to the preset internal bionic structure of the forewing of the Harmonia axyridis, a continuous carbon fiber yarn frame is modeled using Solidworks; and the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material is regarded as a homogeneous isotropic material and modeled using Solidworks.

[0016] Furthermore, in the step 1, Solidworks is used to model the single reinforcement unit of the Harmonia axyridis forewing according to the direction and thickness of the continuous carbon fiber yarn of the internal bionic structure of the Harmonia axyridis forewing.

[0017] Furthermore, the specific operation of step 2 is: importing the established model into the finite element analysis software Abaqus.

[0018] Furthermore, the specific operation of step three is: defining the continuous carbon fiber yarn frame as a transversely isotropic material, and assigning the continuous carbon fiber yarn frame material mechanical parameters calculated by the bridging micromechanics model.

[0019] Furthermore, in the step three, the material mechanical parameters of the continuous carbon fiber yarn frame, including elastic modulus and Poisson's ratio, are calculated according to the bridging matrix method.

[0020] Furthermore, the specific operation of step four is: defining the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material as an isotropic homogeneous material, and assigning the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material the material mechanical parameters actually measured.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) This simulation mechanical properties analysis method for multi-level carbon fiber reinforced composite materials regards three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone-based composite materials as isotropic homogeneous materials, which simplifies the simulation steps to the greatest extent while ensuring the authenticity and reliability of the data.

[0023] (2) In order to make the calculated lateral properties of the carbon fiber yarn more accurate, the simulation mechanical properties analysis method of the multi-level carbon fiber reinforced composite material was performed using a bridging micromechanical model, and the traditional hybrid method was abandoned.

[0024] (3) The simulation mechanical properties analysis method of the multi-level carbon fiber reinforced composite material has a clear process, does not require high computer computing power, and the results obtained are accurate and reliable, providing a preliminary basis for the subsequent processing and defect prediction of the composite material, and has high application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a 3D model of the continuous carbon fiber yarn frame and the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone-based composite material assembled in step S4 of Example 1.

[0026] Figure 2 This is the 3D model after the entire material in step S5 in Example 1 is meshed.

[0027] Figure 3 Schematic diagram of the model for fixing constraints and applying stress in step S6 of Example 1.

[0028] Figure 4 The displacement cloud maps after each step in Example 1 are shown. (a) is the displacement cloud map of the entire multi-stage carbon fiber reinforced polyetheretherketone composite material after compression; (b) is the displacement cloud map of the continuous carbon fiber yarn frame inside the composite material after compression.

[0029] Figure 5 The stress cloud diagrams after each step in Example 2 are shown. (a) is the stress cloud diagram of the multi-stage carbon fiber reinforced polyetheretherketone composite material as a whole after compression; (b) is the stress cloud diagram of the continuous carbon fiber yarn frame inside the composite material after compression.

[0030] Figure 6The strain nephograms after each step in Example 3 are shown. (a) is the strain nephogram of the multi-stage carbon fiber reinforced polyetheretherketone composite material as a whole after compression; (b) is the strain nephogram of the continuous carbon fiber yarn frame inside the composite material after compression. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to 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.

[0032] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0033] An embodiment of the present invention provides a method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material, comprising the following steps:

[0034] Step 1: Modeling a multi-stage carbon fiber reinforced polyetheretherketone based composite material according to a preset structure, that is, modeling a continuous carbon fiber yarn frame and a three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material;

[0035] The multi-stage carbon fiber reinforcement includes continuous carbon fiber yarn reinforcement and discontinuous long carbon fiber reinforcement; wherein each carbon fiber in the continuous carbon fiber yarn is uniformly wrapped by a polyetheretherketone resin that is melted and then cooled, and the carbon fiber yarn and the polyetheretherketone resin that wraps the carbon fiber yarn are regarded as a whole; the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone-based composite material is regarded as an isotropic homogeneous material;

[0036] Step 2: Import the established model into the finite element analysis software;

[0037] Step 3: Define the material type of the continuous carbon fiber yarn frame and assign the material mechanical parameters;

[0038] Step 4: define the material type of the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material and assign the material mechanical parameters;

[0039] Step 5: Assemble the continuous carbon fiber yarn frame and the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material, divide the grid, set constraints and apply stress;

[0040] Step 6: Calculate and obtain the simulation analysis results of the static mechanical properties of the multi-stage carbon fiber reinforced polyetheretherketone based composite material.

[0041] As a preferred embodiment of the present invention, the specific operation of step one is: according to the preset internal bionic structure of the forewing of the multicolored ladybug, the continuous carbon fiber yarn frame is modeled using Solidworks; the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material is regarded as a homogeneous isotropic material and modeled using Solidworks.

[0042] In an embodiment of the present invention, preferably, before the continuous carbon fiber yarn is sewn, the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material preform is taken from the invention patent (application number 201710504295.X, invention name: Carbon fiber long fiber reinforced polyetheretherketone composite material and preparation method thereof), and this composite material is regarded as a homogeneous isotropic material and is modeled using Solidworks.

[0043] As a preferred embodiment of the present invention, in the step 1, the single reinforcement unit of the Harmonia axyridis forewing is modeled using Solidworks according to the direction and thickness of the continuous carbon fiber yarn of the internal bionic structure of the forewing of the Harmonia axyridis.

[0044] In an embodiment of the present invention, the carbon fiber-reinforced polyetheretherketone-based composite material, inspired by the forewings of the Harmonia axyridis, preferably has a special internal reinforcement structure. The reinforcing fibers are composed of continuous carbon fiber yarns and dispersed non-continuous carbon fibers. The specific preparation method is taken from the invention patent (Application No. 202110543244.4, Invention Title: A Carbon Fiber-Reinforced Polyetheretherketone-Based Composite Material and Its Preparation Method). Based on the direction and thickness of the continuous carbon fiber yarns inside, the single reinforcement unit was modeled using Solidworks.

[0045] As a preferred embodiment of the present invention, the specific operation of step 2 is: importing the established model into the finite element analysis software Abaqus.

[0046] As a preferred embodiment of the present invention, the specific operation of step three is: defining the continuous carbon fiber yarn frame as a transversely isotropic material, and assigning the continuous carbon fiber yarn frame material mechanical parameters calculated by the bridging micromechanics model.

[0047] As a preferred embodiment of the present invention, in the step three, the material mechanical parameters of the continuous carbon fiber yarn frame, including the elastic modulus and Poisson's ratio, are calculated according to the bridging matrix method.

[0048] As a preferred embodiment of the present invention, the specific operation of step four is: defining the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material as an isotropic homogeneous material, and assigning the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material the material mechanical parameters actually measured.

[0049] In the embodiments of the present invention, the carbon fiber yarn is preferably treated as a transversely isotropic material because its strength in the fiber axial direction varies greatly, with the strength in the fiber radial direction being much higher. The material mechanical parameters, including elastic modulus and Poisson's ratio, are calculated using the bridging matrix method and assigned in Abaqus. The mechanical properties of the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material were tested to be close to those of an isotropic material, so it was assigned as an isotropic homogeneous material in Abaqus.

[0050] Example 1

[0051] This embodiment provides a method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material, comprising the following steps:

[0052] S1. The size of the three-dimensional needle-punched discontinuous long carbon fiber needle-punched polyetheretherketone-based composite material used for simulation is 8×8×4 mm, which is the size of a frame sewn with a single continuous carbon fiber yarn, that is, the size of a single reinforcement unit.

[0053] The carbon fiber-reinforced polyetheretherketone (PEEK) composite material is derived from the long carbon fiber-reinforced polyetheretherketone (PEEK) prepared in the invention patent application number 201710504295.X, title: "Carbon Fiber Long-Fiber Reinforced Polyetheretherketone Composite Material and Preparation Method thereof," where the carbon fiber:PEEK ratio is 30:70 (wt%). The specific preparation steps are divided into two parts: preparation of a three-dimensional (3D) needle-punched felt preform and vacuum melt hot pressing. During the 3D needle-punched felt preform, PEEK multifilament is spun from spinning-grade PEEK with a melt index of 42 g / 10 min using a high-temperature melt spinning machine (Beijing Shibuya Equipment Co., Ltd., China). The resulting PEEK fibers and carbon fibers (T700-24K, Toray, Japan) are each cut into 40 mm pieces using a fiber cutter. The 70% PEEK fibers and 30% carbon fibers are then washed, mixed, combed, laid, and needle-punched to produce the carbon fiber-reinforced polyetheretherketone composite needle-punched felt preform. During the vacuum melt hot pressing process, the carbon fiber-reinforced polyetheretherketone needle-punched felt preform is cut to mold size and then placed in a vacuum hot press. After a heating-pressurization-saturation-cooling molding process, the three-dimensional needle-punched discontinuous long carbon fiber-reinforced polyetheretherketone-based composite is finally obtained by demolding.

[0054] Treat it as an isotropic material and draw a cuboid of the same size in Solidworks for future use.

[0055] S2, continuous carbon fiber yarn is twisted by spinning hammers, and the carbon fiber used is 6K T700SC type. Its frame structure is inspired by the internal structure of the forewing of the multicolored ladybug. For details, please refer to the invention patent (application number 202110543244.4, invention name: A carbon fiber reinforced polyetheretherketone-based composite material and its preparation method). Inside the pressed composite material, each carbon fiber in the carbon fiber yarn is evenly wrapped with the melted and cooled polyetheretherketone resin. The carbon fiber yarn and the polyetheretherketone resin that wraps it are regarded as a whole, and Solidworks is used to draw the continuous carbon fiber yarn frame according to the preset structure.

[0056] S3. Calculate the material mechanical parameters of the resin-wrapped carbon fiber yarn in all directions, including the elastic modulus and Poisson's ratio, according to the bridged micromechanics model. The specific process is as follows:

[0057] First calculate the fiber filling coefficient of the resin-wrapped carbon fiber yarn:

[0058]

[0059] Where: r is the radius of the carbon fiber. The carbon fiber yarn is obtained by twisting 6K T700 carbon fiber. The total cross-sectional area of ​​the carbon fiber should be multiplied by 6000. R is the radius of the carbon fiber yarn after being impregnated with the PEEK matrix, measured using SEM images of the composite cross section.

[0060] According to previous studies, the flexibility matrix of carbon fiber yarn [S y ] as shown below:

[0061] [S y ]=(V f [S f ]+V m [S m ][A])(V f [I]+V m [A]) -1

[0062] Among them: [S f ] is the carbon fiber flexibility matrix, [S m ] is the flexibility matrix of polyetheretherketone resin, V f Here it corresponds to the fiber filling factor ε, V m is the content of resin impregnated in the yarn 1-ε, [I] is the unit matrix, and [A] is the bridging matrix.

[0063] Carbon fiber flexibility matrix [S f ] can be obtained by converting its own material parameters:

[0064]

[0065] in: is the axial elastic modulus of carbon fiber, is the radial elastic modulus of carbon fiber, is the axial shear modulus of carbon fiber, is the radial shear modulus of carbon fiber, is the axial Poisson's ratio of carbon fiber, is the radial Poisson's ratio of carbon fiber. The above parameters are shown in Table 1.

[0066] Table 1 Material parameters of carbon fiber

[0067]

[0068] PEEK resin flexibility matrix [S m ] can be obtained by converting its own material parameters:

[0069]

[0070] Where: E m is the elastic modulus of the resin, G m is the resin shear modulus, v m is the Poisson's ratio of the resin. The above parameters are shown in Table 2.

[0071] Table 2 Material parameters of polyetheretherketone resin

[0072]

[0073] [A] is the core of the bridging model - the bridging matrix:

[0074]

[0075] in:

[0076]

[0077]

[0078]

[0079]

[0080] Through the above calculations, the flexibility matrix of the resin-wrapped carbon fiber yarn can be obtained, and the stiffness matrix of the resin-wrapped carbon fiber yarn can be obtained by inverting the result:

[0081]

[0082] The material parameters of the resin-wrapped carbon fiber yarn are shown in Table 3.

[0083] Table 3 Calculated material parameters of resin-wrapped carbon fiber yarn

[0084]

[0085]

[0086] S4. Import the model established in step S1 and step S2 into Abaqus, define the continuous carbon fiber yarn frame wrapped in resin as a transversely isotropic material, input the material parameters of the resin-wrapped carbon fiber yarn calculated in step S3, and assign the direction of the carbon fiber frame according to the actual situation. Define the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone-based composite material as an isotropic material. Assemble the two, so that the upper and lower vertices of the carbon fiber frame are tangent to the upper and lower bottom surfaces of the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone-based composite material, as shown in the figure. Figure 1 shown.

[0087] S5. Arrange global mesh seed points for the model and divide the mesh. The average distance between the seed points of the carbon fiber frame is 0.5, and the mesh shape is a regular tetrahedron. The average distance between the seed points of the composite material is 2, and the mesh shape is a regular hexahedron. Figure 2 shown.

[0088] S6. Fix the bottom surface of the whole and apply 400N pressure from top to bottom on the top surface. Figure 3 As shown, the Standard solver is used to solve the displacement cloud diagram under the top surface pressure, as shown in Figure 4 As shown, Figure 4 Middle: (a) is the displacement cloud map of the multi-stage carbon fiber reinforced polyetheretherketone composite material after compression, and (b) is the displacement cloud map of the continuous carbon fiber yarn frame inside the composite material after compression.

[0089] Example 2

[0090] This embodiment provides a method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material, comprising the following steps:

[0091] S1. According to the preset internal bionic structure of the forewing of the Harpy Ladybug, use Solidworks to model the continuous carbon fiber yarn frame, regard the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material as a homogeneous isotropic material, use Solidworks to model, import the established model into the finite element analysis software Abaqus, define the continuous carbon fiber yarn frame as a transversely isotropic material, define the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material as an isotropic material, assign the continuous carbon fiber yarn frame the material mechanical parameters calculated by the bridging matrix method, assign the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material the actually measured material mechanical parameters, assemble the two, divide the grid, set constraints and apply stress. The above steps are the same as the steps before using the Standard solver to solve in step S6 of Example 1.

[0092] S2. Use the Standard solver to solve and obtain the stress cloud diagram under the top surface pressure, such as Figure 5 shown.

[0093] Example 3

[0094] This embodiment provides a method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material, comprising the following steps:

[0095] S1. According to the preset internal bionic structure of the forewing of the Harpy Ladybug, use Solidworks to model the continuous carbon fiber yarn frame, regard the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material as a homogeneous isotropic material, use Solidworks to model, import the established model into the finite element analysis software Abaqus, define the continuous carbon fiber yarn frame as a transversely isotropic material, define the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material as an isotropic material, assign the continuous carbon fiber yarn frame the material mechanical parameters calculated by the bridging matrix method, assign the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material the actually measured material mechanical parameters, assemble the two, divide the grid, set constraints and apply stress. The above steps are the same as the steps before using the Standard solver to solve in step S6 of Example 1.

[0096] S2. Use the Standard solver to solve and obtain the strain contour under the top surface pressure, such as Figure 6 shown.

[0097] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the concept of the present invention. These should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A simulation mechanical properties analysis method for multi-level carbon fiber reinforced composite materials, characterized in that: The following steps are involved: Step 1: Modeling a multi-stage carbon fiber reinforced polyetheretherketone based composite material according to a preset structure, that is, modeling a continuous carbon fiber yarn frame and a three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material; The multi-stage carbon fiber reinforcement includes continuous carbon fiber yarn reinforcement and discontinuous long carbon fiber reinforcement; wherein each carbon fiber in the continuous carbon fiber yarn is uniformly wrapped by a polyetheretherketone resin that is melted and then cooled, and the carbon fiber yarn and the polyetheretherketone resin that wraps the carbon fiber yarn are regarded as a whole; the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone-based composite material is regarded as an isotropic homogeneous material; Step 2: Import the established model into the finite element analysis software; Step 3: Define the material type of the continuous carbon fiber yarn frame and assign the material mechanical parameters; Step 4: define the material type of the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material and assign the material mechanical parameters; Step 5: Assemble the continuous carbon fiber yarn frame and the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material, divide the grid, set constraints and apply stress; Step 6: Calculate and obtain the simulation analysis results of the static mechanical properties of the multi-stage carbon fiber reinforced polyetheretherketone based composite material.

2. The method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material according to claim 1, characterized in that: The specific operation of step one is: according to the preset internal bionic structure of the forewing of the Harmonia axyridis, a continuous carbon fiber yarn frame is modeled using Solidworks; and the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material is regarded as a homogeneous isotropic material and modeled using Solidworks.

3. The method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material according to claim 2, characterized in that: In the step 1, a single reinforcement unit of the Harmonia axyridis forewing is modeled using Solidworks according to the direction and thickness of the continuous carbon fiber yarn of the internal bionic structure of the Harmonia axyridis forewing.

4. The method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material according to claim 1, wherein: The specific operation of step 2 is: importing the established model into the finite element analysis software Abaqus.

5. The method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material according to claim 1, wherein: The specific operation of the step three is: defining the continuous carbon fiber yarn frame as a transversely isotropic material, and assigning the continuous carbon fiber yarn frame material mechanical parameters calculated by the bridging micromechanics model.

6. The method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material according to claim 5, characterized in that: In the step three, the material mechanical parameters of the continuous carbon fiber yarn frame, including the elastic modulus and Poisson's ratio, are calculated according to the bridging matrix method.

7. The method for analyzing the simulated mechanical properties of a multi-level carbon fiber reinforced composite material according to claim 1, wherein: The specific operation of step four is: defining the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material as an isotropic homogeneous material, and assigning the three-dimensional needle-punched discontinuous long carbon fiber reinforced polyetheretherketone composite material the material mechanical parameters actually measured.

Images