Method for determining deformation of rolled unidirectional fiber reinforced polymer matrix composite material and related equipment

Abstract

The embodiment of the present invention provides a method for determining the deformation amount of a roll-type unidirectional fiber-reinforced polymer-based composite material and related equipment, which can obtain the deformation strain energy W of the resin. R And the tensile deformation energy W of the fiber under compression F , the deformation strain energy W of the resin R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined as follows. It can be seen that the present application can determine the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material, which is helpful for optimizing multiple links such as production and transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of composite materials, in particular to a method for determining the deformation amount of a rolled unidirectional fiber-reinforced polymer-based composite material and related equipment. Background Art

[0002] Unidirectional carbon fiber prepreg is also known as cord fabric in engineering and is widely used in many fields.

[0003] Unidirectional carbon fiber prepregs are often transported and sold in rolls. When the unidirectional carbon fiber prepregs are rolled up, the deformation process of the base material is relatively complex. If the deformation of the rolled unidirectional fiber-reinforced polymer-based composite materials can be studied, it will help optimize multiple links such as production and transportation. For example, the maximum length of the rolled unidirectional carbon fiber prepreg per roll of finished product can be determined based on the deformation. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a method and related equipment for determining the deformation of a rolled unidirectional fiber-reinforced polymer matrix composite material, so as to determine the deformation of the rolled unidirectional fiber-reinforced polymer matrix composite material. The specific technical solution is as follows:

[0005] A method for determining the deformation of a rolled unidirectional fiber-reinforced polymer-based composite material, comprising:

[0006] Obtain the deformation strain energy W of the resin R The rolled unidirectional fiber-reinforced polymer comprises a paper tube and a composite material rolled around the paper tube, wherein the composite material is composed of three layers of material, including a separator, a material composite, and a release paper. The material composite is a base composite material, and the separator and the release paper are respectively attached to the upper and lower sides of the material composite. The separator is a release paper or a polyethylene film. The material composite is a composite of resin and fiber, and the fiber is a unidirectional fiber.

[0007] Obtain the tensile deformation energy W of the fiber under pressure F ;

[0008] The deformation strain energy W of the resin R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined.

[0009] Optionally, the deformation strain energy W of the resin is obtained R ,include:

[0010] Based on the formula

[0011]

[0012] Determine the deformation strain energy W of the resin R , where μ is the initial shear modulus, I1 is the strain tensor invariant, D1 is the incompressible parameter of the resin, and J is 1.

[0013] Optionally, the tensile deformation energy W of the fiber under pressure is obtained F ,include:

[0014] Based on the formula

[0015]

[0016] Determine the tensile deformation energy W of the fiber under compression F , where k1, k2 are the material parameters of the fiber, λ a is the elongation of the fiber,

[0017] A device for determining the deformation amount of a roll-type unidirectional fiber-reinforced polymer-based composite material comprises: a first obtaining unit, a second obtaining unit and a deformation determining unit.

[0018] The first obtaining unit is used to obtain the deformation strain energy W of the resin R The rolled unidirectional fiber-reinforced polymer comprises a paper tube and a composite material rolled around the paper tube, wherein the composite material is composed of three layers of material, including a separator, a material composite, and a release paper. The material composite is a base composite material, and the separator and the release paper are respectively attached to the upper and lower sides of the material composite. The separator is a release paper or a polyethylene film. The material composite is a composite of resin and fiber, and the fiber is a unidirectional fiber.

[0019] The second obtaining unit is used to obtain the tensile deformation energy W of the fiber under pressure F ;

[0020] The deformation determination unit is used to convert the deformation strain energy W of the resin into R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined.

[0021] Optionally, the first obtaining unit is specifically configured to:

[0022] Based on the formula

[0023]

[0024] Determine the deformation strain energy W of the resin R, where μ is the initial shear modulus, I1 is the strain tensor invariant, D1 is the incompressible parameter of the resin, and J is 1.

[0025] Optionally, the second obtaining unit is specifically configured to:

[0026] Based on the formula

[0027]

[0028] Determine the tensile deformation energy W of the fiber under compression F , where k1, k2 are the material parameters of the fiber, λ a is the elongation of the fiber,

[0029] A computer-readable storage medium stores a program, which, when executed by a processor, implements the method for determining the deformation amount of any of the above-mentioned roll-type unidirectional fiber-reinforced polymer-based composite materials.

[0030] An electronic device comprising at least one processor, and at least one memory and bus connected to the processor; wherein the processor and the memory communicate with each other via the bus; and the processor is configured to call program instructions in the memory to execute any of the above-mentioned methods for determining the deformation of a roll-type unidirectional fiber-reinforced polymer-based composite material.

[0031] The method for determining the deformation amount of the rolled unidirectional fiber reinforced polymer matrix composite material and the related equipment provided in the embodiment of the present invention can obtain the deformation strain energy W of the resin. R And the tensile deformation energy W of the fiber under compression F , the deformation strain energy W of the resin R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined as follows. It can be seen that the present application can determine the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material, which is helpful for optimizing multiple links such as production and transportation.

[0032] Of course, it is not necessary to achieve all of the advantages described above simultaneously in order to implement any product or method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A flow chart of a method for determining the deformation amount of a rolled unidirectional fiber-reinforced polymer-based composite material provided in an embodiment of the present invention;

[0035] Figure 2 A schematic structural diagram of a roll-type unidirectional fiber-reinforced polymer provided by an embodiment of the present invention;

[0036] Figure 3 A schematic structural diagram of a device for determining the deformation amount of a rolled unidirectional fiber-reinforced polymer-based composite material provided by an embodiment of the present invention;

[0037] Figure 4 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] like Figure 1 As shown, a method for determining the deformation amount of a rolled unidirectional fiber-reinforced polymer-based composite material provided by an embodiment of the present invention may include:

[0040] S100, obtain the deformation strain energy W of the resin R .

[0041] like Figure 2 As shown, the rolled unidirectional fiber reinforced polymer may include: a paper tube 001 and a composite material 002 rolled around the paper tube 001, the composite material 002 is composed of three layers of materials, and the three layers of materials include: an isolation film 003, a material composite 004 and a release paper 005, the material composite 004 is a base composite material, the isolation film 003 and the release paper 005 are respectively attached to the upper and lower sides of the material composite 004, the isolation film 003 is a release paper or a polyethylene film, the material composite 004 is a composite of resin and fiber, and the fiber is a unidirectional fiber.

[0042] Among them, resin refers to an organic polymer that softens or melts when heated, tends to flow under the action of external force when softened, and is solid, semi-solid, or sometimes liquid at room temperature.

[0043] Fiber is a substance composed of continuous or discontinuous filaments. In plants and animals, fibers play a vital role in maintaining tissue. Fiber has a wide range of uses, from being woven into thread, yarn, and rope to forming sheets for papermaking and felting. Fiber is also commonly used to manufacture other materials and to form composite materials with other materials.

[0044] Paper tubes are tube-shaped objects made from paper. Most paper tubes are spiral paper tubes and seamless paper tubes.

[0045] Release paper is a type of anti-adhesive paper that prevents prepreg from sticking and protects it from contamination. Release paper is made of paper coated with a release material. Release paper types are differentiated by material, thickness, elongation, and whether it is single-sided or double-sided.

[0046] During wet-process prepreg production, release paper is placed above and below the prepreg. The lower release paper remains attached to the prepreg as it winds up, so the prepreg surface is typically protected by a layer of release paper. The release paper protects the prepreg from contamination and facilitates scribing. Another function of the release paper is to prevent lateral cracking in unidirectional prepregs.

[0047] Release paper should meet the following requirements: it should be able to stick to the prepreg but also be easy to separate the two; it should not chemically react with the resin system or contaminate the resin system; when the ambient temperature and humidity change, the length and width of the release paper should remain unchanged to avoid wrinkling the release paper and causing the prepreg to wrinkle; it should have sufficient density to prevent moisture from entering the prepreg through it; its elongation after being pulled should be consistent with that of the fiber to prevent deformation or distortion of the prepreg due to asynchronous stretching during the preparation process; its thickness and unit area mass are not easy to accurately control.

[0048] PE film, also known as polyethylene film, is produced from PE granules. PE film is moisture-resistant and has low water permeability. Depending on the manufacturing method and control measures, polyethylene film (PE) can be manufactured into products with different properties, including low-density, medium-density, high-density polyethylene, and cross-linked polyethylene.

[0049] Optionally, obtain the deformation strain energy W of the resin R ,include:

[0050] Based on the formula

[0051]

[0052] Determine the deformation strain energy W of the resin R, where μ is the initial shear modulus, I1 is the strain tensor invariant, D1 is the incompressible parameter of the resin, and J is 1.

[0053] S200, obtain the tensile deformation energy W of the fiber under pressure F ;

[0054] Optionally, the tensile deformation energy W of the fiber under pressure is obtained F ,include:

[0055] Based on the formula

[0056]

[0057] Determine the tensile deformation energy W of the fiber under compression F , where k1 and k2 are the material parameters of the fiber, λ a is the elongation of the fiber,

[0058] S300, the deformation strain energy W of the resin R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined.

[0059] The method for determining the deformation amount of the rolled unidirectional fiber reinforced polymer matrix composite material provided in the embodiment of the present invention can obtain the deformation strain energy W of the resin. R And the tensile deformation energy W of the fiber under compression F , the deformation strain energy W of the resin R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined as follows. It can be seen that the present application can determine the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material, which is helpful for optimizing multiple links such as production and transportation.

[0060] The following is an explanation of the derivation process of this application:

[0061] This constitutive model is based on the fiber-reinforced continuum mechanics theory and constructs a mechanical constitutive model that includes a prepreg resin matrix and reinforcing fibers. This model should be able to obtain key parameters through simple mechanical tests and be able to perform mechanical analysis of prepreg laminate materials under compression and analysis of fiber direction changes in engineering.

[0062] First, the fiber bed without resin is regarded as a unidirectional fiber reinforced hyperelastic matrix composite material. On this basis, it is assumed to be homogenized. Then, the macroscopic mechanical properties of the whole material including the prepreg resin matrix and the reinforcing fibers can be characterized by a scalar function of the right Cauchy-Green strain tensor C and the initial unit direction vector a0 of the fiber, that is, the strain energy function W = W(C, a0). In this equation, C = F T F, F is the deformation gradient tensor, X and x represent the coordinate position of a particle in the initial state and the current state respectively.

[0063] The deformation strain energy of UD prepreg under compression is decomposed into the deformation strain energy of matrix resin and the tensile deformation energy of fiber bed under compression:

[0064] Strain tensor invariant I1=trC,λ a Fiber a 0 The stretching rates, k1 and k2 can be fitted according to the experimental results.

[0065] If the material is assumed to be incompressible, then J = 1, is 0.

[0066] Based on this composite material constitutive model, the code was implemented in the molded composite material software written in FORTRAN language, forming the core module of the composite material molding process simulation software with independent and controllable intellectual property rights. It can simulate the fiber direction change, deformation, wrinkling, thickness change and other results of the fiber preform under pressure during the UD prepreg molding process, filling the domestic gap in this field.

[0067] Corresponding to the above method embodiment, the present invention also provides a device for determining the deformation amount of a roll-type unidirectional fiber-reinforced polymer-based composite material.

[0068] like Figure 3 As shown, an embodiment of the present invention provides a device for determining the deformation amount of a roll-type unidirectional fiber-reinforced polymer-based composite material, which may include: a first obtaining unit 100, a second obtaining unit 200 and a deformation determining unit 300.

[0069] The first obtaining unit 100 is used to obtain the deformation strain energy W of the resin RThe rolled unidirectional fiber-reinforced polymer comprises a paper tube and a composite material rolled around the paper tube, the composite material being composed of three layers of material, the three layers of material comprising a separator, a material composite, and a release paper, the material composite being a base composite material, the separator and the release paper being respectively attached to the upper and lower sides of the material composite, the separator being a release paper or a polyethylene film, the material composite being a composite of resin and fibers, and the fibers being unidirectional fibers;

[0070] The second obtaining unit 200 is used to obtain the tensile deformation energy W of the fiber under pressure F ;

[0071] The deformation determination unit 300 is used to determine the deformation strain energy W of the resin. R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined.

[0072] Optionally, the first obtaining unit 100 is specifically configured to:

[0073] Based on the formula

[0074]

[0075] Determine the deformation strain energy W of the resin R , where μ is the initial shear modulus, I1 is the strain tensor invariant, D1 is the incompressible parameter of the resin, and J is 1.

[0076] Optionally, the second obtaining unit 200 is specifically configured to:

[0077] Based on the formula

[0078]

[0079] Determine the tensile deformation energy W of the fiber under compression F , where k1 and k2 are the material parameters of the fiber, λ a is the elongation of the fiber,

[0080] The embodiment of the present invention provides a device for determining the deformation amount of a roll-type unidirectional fiber-reinforced polymer-based composite material, which can obtain the deformation strain energy W of the resin. R And the tensile deformation energy W of the fiber under compression F , the deformation strain energy W of the resin R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined as follows. It can be seen that the present application can determine the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material, which is helpful for optimizing multiple links such as production and transportation.

[0081] The present invention also provides a computer-readable storage medium storing a program, which, when executed by a processor, implements the method for determining the deformation amount of any of the above-mentioned roll-type unidirectional fiber-reinforced polymer-based composite materials.

[0082] like Figure 4 As shown, an embodiment of the present application further provides an electronic device 70, which includes at least one processor 701, and at least one memory 702 and a bus 703 connected to the processor 701; wherein the processor 701 and the memory 702 communicate with each other through the bus 703; the processor 701 is used to call the program instructions in the memory 702 to execute any of the above-mentioned methods for determining the deformation amount of the roll-type unidirectional fiber-reinforced polymer-based composite materials.

[0083] The electronic device 70 in this article can be a server, a PC, a PAD, a mobile phone, etc.

[0084] The device for determining the deformation amount of the roll-type unidirectional fiber-reinforced polymer-based composite material includes a processor and a memory. The above-mentioned first acquisition unit 100, the second acquisition unit 200 and the deformation determination unit 300 are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize the corresponding functions.

[0085] The processor includes a core, which retrieves corresponding program units from the memory. One or more cores can be provided, and the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined by adjusting the core parameters.

[0086] An embodiment of the present invention provides a storage medium storing a program, which, when executed by a processor, implements the method for determining the deformation amount of the roll-type unidirectional fiber-reinforced polymer-based composite material.

[0087] An embodiment of the present invention provides a processor, which is used to run a program, wherein the program, when running, executes the method for determining the deformation amount of the roll-type unidirectional fiber-reinforced polymer-based composite material.

[0088] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing the program including the steps of initializing the method for determining the deformation amount of the above-mentioned roll-type unidirectional fiber-reinforced polymer-based composite material.

[0089] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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 steps in the process. 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.

[0090] In a typical configuration, the device includes one or more processors (CPUs), memory, and a bus. The device may also include input / output interfaces, network interfaces, and the like.

[0091] Memory may include non-permanent memory in a computer-readable medium, random access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory includes at least one memory chip. Memory is an example of a computer-readable medium.

[0092] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0093] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. It should also be noted that the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, commodity, or device comprising the element.

[0095] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0096] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for determining the deformation of a rolled unidirectional fiber-reinforced polymer matrix composite material, characterized in that: include: Obtain the deformation strain energy W of the resin R The rolled unidirectional fiber-reinforced polymer comprises a paper tube and a composite material rolled around the paper tube, wherein the composite material is composed of three layers of material, including a separator, a material composite, and a release paper. The material composite is a base composite material, and the separator and the release paper are respectively attached to the upper and lower sides of the material composite. The separator is a release paper or a polyethylene film. The material composite is a composite of resin and fiber, and the fiber is a unidirectional fiber. Obtain the tensile deformation energy W of the fiber under pressure F ; The deformation strain energy W of the resin R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined.

2. The method according to claim 1, characterized in that The obtained deformation strain energy W of the resin R ,include: Based on the formula Determine the deformation strain energy W of the resin R , where μ is the initial shear modulus, I1 is the strain tensor invariant, D1 is the incompressible parameter of the resin, and J is 1.

3. The method according to claim 1, characterized in that The tensile deformation energy W of the fiber under pressure is obtained F ,include: Based on the formula Determine the tensile deformation energy W of the fiber under compression F , where k1, k2 are the material parameters of the fiber, λ a is the elongation of the fiber, 4. A device for determining the deformation of a rolled unidirectional fiber-reinforced polymer matrix composite material, characterized in that: include: a first obtaining unit, a second obtaining unit and a deformation determining unit, The first obtaining unit is used to obtain the deformation strain energy W of the resin R The rolled unidirectional fiber-reinforced polymer comprises a paper tube and a composite material rolled around the paper tube, wherein the composite material is composed of three layers of material, including a separator, a material composite, and a release paper. The material composite is a base composite material, and the separator and the release paper are respectively attached to the upper and lower sides of the material composite. The separator is a release paper or a polyethylene film. The material composite is a composite of resin and fiber, and the fiber is a unidirectional fiber. The second obtaining unit is used to obtain the tensile deformation energy W of the fiber under pressure F ; The deformation determination unit is used to convert the deformation strain energy W of the resin into R and the tensile deformation energy W of the fiber under compression F The sum of the deformation of the rolled unidirectional fiber reinforced polymer matrix composite material is determined.

5. The determination device according to claim 4, characterized in that The first obtaining unit is specifically configured to: Based on the formula Determine the deformation strain energy W of the resin R , where μ is the initial shear modulus, I1 is the strain tensor invariant, D1 is the incompressible parameter of the resin, and J is 1.

6. The determination device according to claim 4, characterized in that The second obtaining unit is specifically configured to: Based on the formula Determine the tensile deformation energy W of the fiber under compression F , where k1, k2 are the material parameters of the fiber, λ a is the elongation of the fiber, 7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a program, and when the program is executed by a processor, the method for determining the deformation amount of the roll-type unidirectional fiber-reinforced polymer-based composite material according to any one of claims 1 to 3 is implemented.

8. An electronic device, characterized in that: The electronic device includes at least one processor, and at least one memory and bus connected to the processor; wherein the processor and the memory communicate with each other through the bus; the processor is used to call the program instructions in the memory to execute the method for determining the deformation amount of the rolled unidirectional fiber-reinforced polymer-based composite material according to any one of claims 1 to 3.

Images