Method and system for testing mechanical properties of composite material
By using test specimens with 0° and 0/90° laying configurations in the mechanical properties of composite materials, combined with formula calculations, the problem of complex and high cost of obtaining mechanical properties of composite materials in the existing technology is solved, and rapid High-precision multiple performance parameters acquisition.
Patent Information
- Application Number
- CN202411664916.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-02-14
AI Technical Summary
The prior art is difficult to quickly and accurately obtain the longitudinal modulus, lateral modulus, in-plane shear modulus and longitudinal failure strength of continuous fiber composite materials through one type of test piece, resulting in high test costs, long periods and discrete data. Very sexy.
Test specimens using 0° laying configuration and 0/90° orthogonal laying configuration can simultaneously obtain multiple mechanical properties parameters of composite materials through a single tensile or compression test and a specific formula calculation.
It realizes the rapid and high-precision acquisition of multiple mechanical performance parameters of composite materials through one type of test pieces, greatly saving test pieces production, testing time and cost, and reducing data discretism.
Smart Images
Figure CN119437935A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of rail transportation technology, and in particular to a composite material mechanical property testing method and system. Background Art
[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.
[0003] Continuous fiber composites are composed of a reinforcement phase and a matrix phase. The microscopic changes in the reinforcement phase, the matrix phase and the composite of the two phases will cause the performance discreteness of the mechanical properties of the composites. Therefore, for the material-level mechanical properties of composite materials, in the engineering development process of the product, standardized material performance data based on statistics is indispensable. Then, due to the anisotropy of composite materials, the mechanical properties of a single layer of composite materials require the modulus at 0° and 90°, the in-plane shear modulus, and the longitudinal tensile and compressive strength. At least three types of material test pieces are required. The molding and manufacturing of material test pieces require high costs and a long cycle, which makes it difficult to meet the design and development of products, especially in the rail transit and automotive industries.
[0004] The current test standards for the in-plane shear modulus of composite materials lack a convenient, accurate, and reliable method. When the in-plane shear modulus is measured by ±45° eccentric stretching, the fiber deflection increases by 1° for every 2% increase in axial strain. Therefore, during the stretching process, the ±45° ply definition assumption will not hold, and the ±45° test piece angle is difficult to meet the requirement of no angle deviation. For V-notch shear specimens, there are also high requirements for the fiber straightness and notch processing of the test piece. In the 1-2 plane test, the elastic modulus result obtained by the [0]° specimen is too high (for carbon / epoxy, about 10% higher), while the elastic modulus value obtained by the
[90] ° specimen of the same material is about 20% lower. For unidirectional composites, the [0 / 90]° specimen can obtain the most accurate in-plane shear modulus measurement value.
[0005] The Chinese patent with application number "CN2021108703170" discloses an efficient testing method for the shear mechanical properties of composite materials. This patent requires the separate production of shear test pieces and requires separate test fixtures, which still requires a lot of time and cost in the production and testing of test pieces.
[0006] That is, there is currently no test method that can obtain the mechanical properties of continuous fiber composites through one type of test piece and one type of test. Summary of the invention
[0007] In order to solve the technical problems existing in the above-mentioned background technology that there are many types of tests required for obtaining the mechanical properties of continuous fiber composite materials, which consume a lot of cycles and costs, the present invention provides a composite material mechanical properties testing method and system, which can simultaneously obtain the longitudinal modulus, transverse modulus, in-plane shear modulus and longitudinal destructive strength of the continuous fiber composite material through one type of test piece testing, greatly saving the test piece production and processing costs, testing costs and cycle costs, and has the advantages of simplicity, high efficiency, and small discreteness.
[0008] In order to achieve the above object, the present invention adopts the following technical solution: A first aspect of the present invention provides a method for testing the mechanical properties of a composite material.
[0009] A method for testing mechanical properties of composite materials, comprising: The test specimen adopts a 0° ply configuration, and obtains a first longitudinal elastic modulus and a first longitudinal breaking strength of a tensile or compressive test of the test specimen; and calculates a first transverse elastic modulus and a first in-plane shear modulus according to the first longitudinal elastic modulus; The test specimen adopts a 0 / 90° orthogonal ply configuration to obtain the second longitudinal elastic modulus and the second longitudinal destructive strength of the test specimen in a tensile or compression test. The longitudinal destructive strength of the 0° unidirectional laminate is calculated based on the second longitudinal destructive strength. The longitudinal elastic modulus, transverse elastic modulus and in-plane shear modulus of the 0° unidirectional laminate are calculated respectively based on the second longitudinal elastic modulus.
[0010] Further, the first transverse elastic modulus is calculated according to the first longitudinal elastic modulus, using the following formula: E2=K1×E1 Among them, E2 represents the first transverse elastic modulus, K1 represents the first coefficient, and E1 represents the first longitudinal elastic modulus.
[0011] Further, the first in-plane shear modulus is calculated based on the first longitudinal elastic modulus using the following formula: G 12 =K2×E1 Among them, G 12 represents the first in-plane shear modulus, K2 represents the second coefficient, and E1 represents the first longitudinal elastic modulus.
[0012] Further, according to the second longitudinal elastic modulus, the longitudinal elastic modulus of the 0° unidirectional laminate is calculated respectively; the following formula is used: E3=K3×E x Where E3 represents the longitudinal elastic modulus of the 0° unidirectional laminate, K3 represents the third coefficient, and E x represents the second longitudinal elastic modulus.
[0013] Further, the longitudinal breaking strength of the 0° unidirectional laminate is calculated based on the second longitudinal breaking strength; the following formula is used: X1=α×X Where X1 represents the longitudinal failure strength of the 0° unidirectional laminate, α=E3 / E x , E3 represents the longitudinal elastic modulus of the 0° unidirectional laminate, E x represents the second longitudinal elastic modulus, and X represents the second longitudinal breaking strength.
[0014] Further, the transverse elastic modulus of the 0° unidirectional laminate is calculated based on the second longitudinal elastic modulus; the following formula is used: E4=K4×E x Where E4 represents the transverse elastic modulus of the 0° unidirectional laminate, K4 represents the fourth coefficient, and E x represents the second longitudinal elastic modulus.
[0015] Further, the in-plane shear modulus of the 0° unidirectional laminate is calculated based on the second longitudinal elastic modulus; the following formula is used: G 22 =K5×E x Among them, G 22 represents the in-plane shear modulus of the 0° unidirectional laminate, K5 represents the fifth coefficient, E x represents the second longitudinal elastic modulus.
[0016] A second aspect of the present invention provides a composite material mechanical property testing system.
[0017] A composite material mechanical properties testing system, comprising: The first test module is configured to: test the specimen in a 0° ply configuration to obtain a first longitudinal elastic modulus and a first longitudinal breaking strength of a tensile or compressive test of the test specimen; and calculate a first transverse elastic modulus and a first in-plane shear modulus according to the first longitudinal elastic modulus; The second test module is configured as follows: the test specimen adopts a 0 / 90° orthogonal ply configuration to obtain a second longitudinal elastic modulus and a second longitudinal breaking strength of a tensile or compression test of the test specimen; based on the second longitudinal breaking strength, the longitudinal breaking strength of a 0° unidirectional laminate is calculated; based on the second longitudinal elastic modulus, the longitudinal elastic modulus, transverse elastic modulus and in-plane shear modulus of the 0° unidirectional laminate are respectively calculated.
[0018] A third aspect of the present invention provides a computer-readable storage medium.
[0019] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps in the composite material mechanical property testing method as described in the first aspect above.
[0020] A fourth aspect of the present invention provides a computer device.
[0021] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the composite material mechanical property testing method as described in the first aspect above are implemented.
[0022] A fifth aspect of the present invention provides a computer program product or a computer program.
[0023] The present invention provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps in the composite material mechanical property testing method as described in the first aspect above.
[0024] Compared with the prior art, the present invention has the following beneficial effects: The present invention can quickly and accurately obtain the longitudinal elastic modulus, transverse elastic modulus, in-plane shear modulus and longitudinal breaking strength of a continuous fiber single-layer composite material through a unidirectional tensile test. It solves the problem that the engineering constants of anisotropic composite materials require multiple types of tests to obtain, greatly reduces the number of tests, improves test efficiency, and solves the problems of data discreteness and test inaccuracy caused by the nonlinearity of composite materials, premature damage of test pieces and self-coupling. It is one of the important implementation paths for composite material mechanical property testing, has great advantages in reducing test time and cost, and has strong market practicality and market value.
[0025] The present invention adopts an orthogonal test specimen, which solves the problems of premature damage such as end crushing and longitudinal splitting during testing of unidirectional laminates, and the load required for the test is smaller and easier to achieve.
[0026] The orthogonal ply test piece used in the present invention is closer to the actual ply of the composite material, taking into account the effect of adjacent plies on the performance of 0° ply fibers, and is more representative of the single-layer performance of the actual ply. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.
[0028] Figure 1 It is a flow chart of a composite material mechanical property testing method shown in the present invention; Figure 2 The longitudinal tensile modulus is obtained by the longitudinal tensile test of the 0° unidirectional ply specimen shown in the present invention; Figure 3 The transverse tensile modulus is obtained by the transverse tensile test of the 0° unidirectional ply specimen shown in the present invention; Figure 4 The present invention shows the sample state of the 0° unidirectional ply test piece before and after stretching; Figure 5 The present invention shows a method for verifying the in-plane shear modulus obtained by an in-plane shear test of a 0° unidirectional laminate test piece. DETAILED DESCRIPTION
[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0032] It should be noted that the flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the methods and systems according to various embodiments of the present disclosure. It should be noted that each box in the flowchart or block diagram can represent a module, a program segment, or a part of a code, and the module, program segment, or a part of a code may include one or more executable instructions for implementing the logical functions specified in each embodiment. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the flowchart and / or block diagram, and the combination of boxes in the flowchart and / or block diagram can be implemented using a dedicated hardware-based system that performs a specified function or operation, or can be implemented using a combination of dedicated hardware and computer instructions.
[0033] Embodiment 1 The present embodiment provides a method for testing the mechanical properties of composite materials. The present embodiment uses the method applied to a server as an example for illustration. It is understandable that the method can also be applied to a terminal, and can also be applied to a terminal, a server, and a system, and is implemented through the interaction between the terminal and the server. The server can be an independent physical server, or a server cluster or a distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network servers, cloud communications, middleware services, domain name services, security services CDN, and big data and artificial intelligence platforms. The terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, etc., but is not limited to this. The terminal and the server can be directly or indirectly connected via wired or wireless communication, which is not limited in this application. In the present embodiment, the method includes the following steps: The test specimen adopts a 0° ply configuration, and obtains a first longitudinal elastic modulus and a first longitudinal breaking strength of a tensile or compressive test of the test specimen; and calculates a first transverse elastic modulus and a first in-plane shear modulus according to the first longitudinal elastic modulus; The test specimen adopts a 0 / 90° orthogonal ply configuration to obtain the second longitudinal elastic modulus and the second longitudinal destructive strength of the test specimen in a tensile or compression test. The longitudinal destructive strength of the 0° unidirectional laminate is calculated based on the second longitudinal destructive strength. The longitudinal elastic modulus, transverse elastic modulus and in-plane shear modulus of the 0° unidirectional laminate are calculated respectively based on the second longitudinal elastic modulus.
[0034] The present invention can obtain the longitudinal elastic modulus, transverse elastic modulus, in-plane shear modulus and longitudinal destructive strength of the composite material through one type of specimen test, which greatly reduces the type, quantity, cycle and cost of composite material tests.
[0035] The following is a detailed description of the composite material mechanical properties testing method described in this embodiment in conjunction with the accompanying drawings. Figure 1 As shown: Implementation Case 1: The test specimen adopts a 0° ply configuration, and a tensile or compression test is performed to obtain the longitudinal elastic modulus E1 and longitudinal breaking strength of the specimen. The transverse elastic modulus E2=K1×E1 of the test specimen is obtained through the longitudinal elastic modulus, where K1=0.0682; the in-plane shear modulus G 12 =K2×E1, where K1=0.0341; Therefore, the transverse elastic modulus and in-plane shear modulus of the composite material can be obtained through one type of test. It can be seen that the longitudinal tensile modulus of the single-layer plate tested in the 0° direction is 139GPa, so the transverse elastic modulus E2=0.0682×E1=9.48GPa and the in-plane shear modulus G 12 =0.0341×E1=4.74GPa. The transverse modulus obtained by this method is highly consistent with the shear modulus test data. This method can obtain the transverse modulus and in-plane shear modulus of unidirectional laminates by only testing the tensile test of the test piece in the 0° direction, which greatly reduces the test types and number of test pieces, saving time and cost.
[0036] Implementation Case 2: The test specimen adopts a 0 / 90° ply configuration, and the specific ply configuration is [90 / 0] ns (Laying order is 90 / 0 / 0 / 90) or [0 / 90] ns (The ply sequence is 0 / 90 / 90 / 0), the number of plies n is 2 to 7, and a longitudinal tensile or compression test is performed after the test according to the ply configuration to obtain the longitudinal modulus E of the orthogonal ply test specimen. X And the longitudinal destructive strength X, the longitudinal elastic modulus of the 0° unidirectional laminate is obtained by the following formula: E3=K3×E x , where K3=1.87; transverse elastic modulus E4=K4×E x , where K4=0.127; in-plane shear modulus G 22 =K5×E x , where K5 = 0.0638. The longitudinal destructive strength of a single-layer board can be obtained by the following formula X1 = α × X, where α is the ply coefficient. For the test specimen with 0 / 90° orthogonal ply, α can be taken as 1.87. The elastic modulus E1 of the unidirectional laminate can also be obtained by other methods, α = E1 / E x The test specimen of the implementation case 2 may or may not be affixed with a reinforcing sheet. If the reinforcing sheet is not affixed, the premature damage at the end caused by the reinforcing sheet can be solved, the dispersion of the test data can be reduced, and the test cost and cycle can be reduced.
[0037] like Figure 2 , Figure 3 As shown, the present invention respectively carries out longitudinal tensile test and transverse tensile test of unidirectional ply specimens to obtain longitudinal tensile modulus and transverse tensile modulus; according to Figure 2 and Figure 3 It can be seen from the verification that the method proposed in the present invention is accurate and reliable.
[0038] like Figure 4As shown, the present invention shows the sample state before and after the 0° unidirectional laminate test piece is stretched, the left side is before stretching, and the back side is after stretching, as shown in FIG. Figure 5 As shown, the present invention provides an in-plane shear test of a 0° unidirectional laminate test piece to obtain the in-plane shear modulus. The data in the figure further verifies the accuracy of the method of the present invention.
[0039] The present invention can achieve high-quality acquisition of material-level performance data required for composite material structure design verification in the field of rail transit. It solves the problem that the engineering constants of anisotropic composite materials require multiple types of tests to obtain, greatly reduces the number of tests, improves test efficiency, and solves the data discreteness and test inaccuracy caused by the nonlinearity of composite materials, premature damage of specimens and self-coupling.
[0040] Embodiment 2 This embodiment provides a composite material mechanical property testing system.
[0041] The first test module is configured to: test the specimen in a 0° ply configuration to obtain a first longitudinal elastic modulus and a first longitudinal breaking strength of a tensile or compressive test of the test specimen; and calculate a first transverse elastic modulus and a first in-plane shear modulus according to the first longitudinal elastic modulus; The second test module is configured as follows: the test specimen adopts a 0 / 90° orthogonal ply configuration to obtain a second longitudinal elastic modulus and a second longitudinal breaking strength of a tensile or compression test of the test specimen; based on the second longitudinal breaking strength, the longitudinal breaking strength of a 0° unidirectional laminate is calculated; based on the second longitudinal elastic modulus, the longitudinal elastic modulus, transverse elastic modulus and in-plane shear modulus of the 0° unidirectional laminate are respectively calculated.
[0042] The ply configuration is 0°, [90 / 0] ns or [0 / 90] ns , where the number of layers n is 2 to 7; The first test module is specifically configured as follows: For a 0° sample: After the longitudinal elastic modulus E1 of the test piece is obtained, the transverse elastic modulus E2=0.0682×E1, and the in-plane shear modulus G 12 =0.0341×E1. The transverse modulus and in-plane shear modulus can be obtained only through the mechanical test in the 0° direction.
[0043] The second test module is specifically configured as follows: for the test specimen in the form of a 0 / 90° orthogonal ply configuration: the longitudinal modulus and longitudinal breaking strength of the laminate are obtained by testing, and the longitudinal elastic modulus of the 0° unidirectional laminate is obtained by the following formula: E3=1.87×E x , transverse elastic modulus E4 = 0.127 × E x , in-plane shear modulus G22 =0.0638×E x The longitudinal strength of a single-layer board can be obtained by the following formula: X1=α×X, where α is the ply coefficient. For the test specimen with 0 / 90 orthogonal ply, α can be taken as 1.87. The elastic modulus E3 of the unidirectional laminate can also be obtained by other methods: α=E3 / E x .
[0044] The present invention can simultaneously obtain the longitudinal modulus, transverse modulus, in-plane shear modulus and longitudinal destructive strength of a unidirectional laminate through one type of test, and the method greatly saves the types, quantity, cycle and cost of test pieces.
[0045] Embodiment 3 This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the composite material mechanical property testing method described in the first embodiment are implemented.
[0046] Embodiment 4 This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps in the composite material mechanical property testing method described in the first embodiment are implemented.
[0047] Embodiment 5 This embodiment provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps in the above-mentioned composite material mechanical property testing method.
[0048] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.
[0049] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.
[0050] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.
[0051] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.
[0052] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.
[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A method for testing mechanical properties of composite materials, characterized in that: include: The test specimen adopts a 0° ply configuration, and obtains a first longitudinal elastic modulus and a first longitudinal breaking strength of a tensile or compressive test of the test specimen; and calculates a first transverse elastic modulus and a first in-plane shear modulus according to the first longitudinal elastic modulus; The test specimen adopts a 0 / 90° orthogonal ply configuration to obtain the second longitudinal elastic modulus and the second longitudinal destructive strength of the test specimen in a tensile or compression test. The longitudinal destructive strength of the 0° unidirectional laminate is calculated based on the second longitudinal destructive strength. The longitudinal elastic modulus, transverse elastic modulus and in-plane shear modulus of the 0° unidirectional laminate are calculated respectively based on the second longitudinal elastic modulus.
2. The composite material mechanical properties testing method according to claim 1, characterized in that: According to the first longitudinal elastic modulus, the first transverse elastic modulus is calculated using the following formula: E2=K1×E1 Among them, E2 represents the first transverse elastic modulus, K1 represents the first coefficient, and E1 represents the first longitudinal elastic modulus.
3. The method for testing mechanical properties of composite materials according to claim 1, characterized in that: According to the first longitudinal elastic modulus, the first in-plane shear modulus is calculated using the following formula: G 12 =K2×E1 Among them, G 12 represents the first in-plane shear modulus, K2 represents the second coefficient, and E1 represents the first longitudinal elastic modulus.
4. The method for testing mechanical properties of composite materials according to claim 1, characterized in that: According to the second longitudinal elastic modulus, the longitudinal elastic modulus of the 0° unidirectional laminate is calculated respectively; Use the following formula: E3=K3×E x Where E3 represents the longitudinal elastic modulus of the 0° unidirectional laminate, K3 represents the third coefficient, and E x represents the second longitudinal elastic modulus.
5. The method for testing mechanical properties of composite materials according to claim 1, characterized in that: According to the second longitudinal failure strength, the longitudinal failure strength of the 0° unidirectional laminate is calculated; Use the following formula: X1=α×X Where X1 represents the longitudinal failure strength of the 0° unidirectional laminate, α=E3 / E x , E3 represents the longitudinal elastic modulus of the 0° unidirectional laminate, E x represents the second longitudinal elastic modulus, and X represents the second longitudinal breaking strength.
6. The composite material mechanical properties testing method according to claim 1, characterized in that: According to the second longitudinal elastic modulus, the transverse elastic modulus of the 0° unidirectional laminate is calculated; Use the following formula: E4=K4×E x Where E4 represents the transverse elastic modulus of the 0° unidirectional laminate, K4 represents the fourth coefficient, and E x represents the second longitudinal elastic modulus; or, Based on the second longitudinal elastic modulus, the in-plane shear modulus of the 0° unidirectional laminate is calculated using the following formula: G 22 =K5×E x Among them, G 22 represents the in-plane shear modulus of the 0° unidirectional laminate, K5 represents the fifth coefficient, E x represents the second longitudinal elastic modulus.
7. A composite material mechanical properties testing system, characterized in that: include: The first test module is configured to: test the specimen in a 0° ply configuration to obtain a first longitudinal elastic modulus and a first longitudinal breaking strength of a tensile or compressive test of the test specimen; and calculate a first transverse elastic modulus and a first in-plane shear modulus according to the first longitudinal elastic modulus; The second test module is configured as follows: the test specimen adopts a 0 / 90° orthogonal ply configuration to obtain a second longitudinal elastic modulus and a second longitudinal breaking strength of a tensile or compression test of the test specimen; based on the second longitudinal breaking strength, the longitudinal breaking strength of a 0° unidirectional laminate is calculated; based on the second longitudinal elastic modulus, the longitudinal elastic modulus, transverse elastic modulus and in-plane shear modulus of the 0° unidirectional laminate are respectively calculated.
8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in the composite material mechanical property testing method as described in any one of claims 1 to 6 are implemented.
9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps in the composite material mechanical property testing method according to any one of claims 1 to 6 are implemented.
10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps in the composite material mechanical property testing method according to any one of claims 1 to 6 are implemented.