Composite material testing method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of vehicles, in particular to a composite material testing method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a geometric model and testing requirements of a to-be-tested material; the geometric model is processed to obtain an initial injection molding model and a structural analysis model, the initial injection molding model is subjected to injection molding simulation to obtain simulation data, and the simulation data comprise weld line data and residual stress field data; and based on the weld line data and the residual stress field data, mapping the weld line and the residual stress field to a structural analysis model to obtain a target model, and performing a durability test on the target model according to test requirements to obtain a durability test result. Therefore, the distribution results of the weld lines and the residual stress are mapped into the strength durability simulation model of the analyzed structure, the problem that the simulation precision is insufficient due to the fact that the influence of the weld lines and the residual stress on the material performance is neglected in the related technology is solved, and the strength durability analysis precision can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a test method and device for composite materials, an electronic device and a storage medium. BACKGROUND

[0002] Energy saving and emission reduction is the main direction of product optimization in the automobile industry in recent years. Composite materials have become the main material for the development of automobile lightweight due to their lightweight and high strength and a series of excellent properties.

[0003] Glass fiber reinforced thermoplastic composite material refers to an energy-saving and lightweight composite material with thermoplastic resin as the matrix and glass fiber as the reinforcing framework, mainly applied to non-load-bearing or secondary load-bearing structural parts. In the process of injection molding of glass fiber reinforced thermoplastic composite material, when two flow fronts meet, a weld line will be formed, which is a relatively weak area and will reduce the local strength performance of the part. At the same time, residual stress caused by uneven material shrinkage will also occur during injection molding. For glass fiber reinforced thermoplastic composite material, weld lines and residual stress during molding are inevitable. Therefore, in order to ensure the accuracy of the analysis of the strength and durability of the glass fiber composite material structure, the influence of the weld lines and residual stress during molding on the strength and durability of the structure must be considered.

[0004] The related technology usually uses a simplified finite element model based on homogenization assumption to analyze the strength and durability of the glass fiber reinforced thermoplastic composite material structure, directly assigns the overall macroscopic mechanical parameters of the material, and then applies a load to perform static strength or fatigue simulation. However, the related technology does not consider the influence of weld lines and residual stress during molding on material performance when analyzing the strength and durability of the glass fiber composite material structure, which makes the simulation prediction deviate from the results of bench test or real vehicle verification, and it is difficult to effectively guide the design of lightweight parts. SUMMARY

[0005] The present application provides a test method and device for composite materials, an electronic device and a storage medium to solve the problem of insufficient simulation accuracy caused by ignoring the influence of weld lines and residual stress on material performance in related technology, which can effectively improve the strength and durability analysis accuracy of glass fiber reinforced thermoplastic composite material structural parts.

[0006] The first aspect embodiment of the present application provides a test method for composite materials, comprising the following steps: Obtaining a geometric model of a material to be tested and test requirements; Processing the geometric model to obtain an initial injection molding model and a structure analysis model, and performing injection molding simulation on the initial injection molding model to obtain simulation data, the simulation data including weld line data and residual stress field data; mapping the weld line and the residual stress field to the structure analysis model to obtain a target model, and performing durability testing on the target model according to the test requirement to obtain a durability test result.

[0007] Optionally, in some embodiments, the performing injection molding simulation on the initial injection molding model to obtain simulation data comprises determining an injection molding analysis type; determining a material type of the initial injection molding model, and establishing a gating system and a cooling system based on the initial injection molding model to obtain a target injection molding model; performing injection molding simulation on the target injection molding model according to the injection molding analysis type based on preset process parameters to obtain the simulation data.

[0008] Optionally, in some embodiments, the injection molding analysis type comprises at least one of cooling, filling, pressure maintaining, and warping.

[0009] Optionally, in some embodiments, the performing testing on the target model according to the test requirement to obtain a target test result comprises: performing stress analysis on the target model by using preset stress test software according to the test requirement to obtain a stress analysis result; performing fatigue testing on the target model by using preset fatigue test software based on the stress analysis result to obtain the target test result.

[0010] Optionally, in some embodiments, after the performing durability testing on the target model according to the test requirement to obtain the durability test result, the method further comprises: determining whether the material to be tested meets preset durability test conditions according to the durability test result; if the material to be tested meets the preset durability test conditions, generating an optimization strategy according to the durability test result, and performing durability optimization on the material to be tested according to the optimization strategy.

[0011] The second aspect embodiment of the present application provides a test device for a composite material, comprising: an acquisition module configured to acquire a geometric model of a material to be tested and a test requirement; a simulation module configured to process the geometric model to obtain an initial injection molding model and a structure analysis model, and perform injection molding simulation on the initial injection molding model to obtain simulation data, wherein the simulation data comprises weld line data and residual stress field data; a test module, configured to map the welding line and the residual stress field to the structure analysis model to obtain a target model based on the welding line data and the residual stress field data, and perform durability test on the target model according to the test requirement to obtain a durability test result.

[0012] Optionally, in some embodiments, the simulation module comprises: a first determination unit, configured to determine an injection molding analysis type; a second determination unit, configured to determine a material type of an initial injection molding model, and establish a gating system and a cooling system based on the initial injection molding model to obtain a target injection molding model; a simulation unit, configured to perform injection molding simulation on the target injection molding model according to the injection molding analysis type based on preset process parameters to obtain the simulation data.

[0013] Optionally, in some embodiments, the injection molding analysis type comprises at least one of cooling, filling, pressure maintaining and warping.

[0014] Optionally, in some embodiments, the test module comprises: a first test unit, configured to perform stress analysis on the target model by using preset stress test software according to the test requirement to obtain a stress analysis result; a second test unit, configured to perform fatigue test on the target model by using preset fatigue test software based on the stress analysis result to obtain the target test result.

[0015] Optionally, in some embodiments, after the durability test on the target model according to the test requirement is performed to obtain the durability test result, the test module comprises: a judgment unit, configured to determine whether the material to be tested meets preset durability test conditions according to the durability test result; an optimization unit, configured to generate an optimization strategy according to the durability test result in a case where the material to be tested meets the preset durability test conditions, and perform durability optimization on the material to be tested according to the optimization strategy.

[0016] A third aspect of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the test method of the composite material as described in the above embodiments.

[0017] A fourth aspect of the present application provides a computer readable storage medium having a computer program stored thereon, wherein the program is executed by a processor to implement the test method of the composite material as described in the above embodiments.

[0018] Thus, by acquiring a geometric model of the material to be tested and test requirements, and processing the geometric model to obtain an initial injection molding model and a structure analysis model, performing injection molding simulation on the initial injection molding model to obtain simulation data, the simulation data including weld line data and residual stress field data, and based on the weld line data and the residual stress field data, mapping the weld line and the residual stress field to the structure analysis model to obtain a target model, and performing durability testing on the target model according to the test requirements to obtain a durability test result. Thus, the application maps the distribution results of the weld line and the residual stress to the strength and durability simulation model of the analyzed structure, solves the problem of insufficient simulation accuracy caused by the related art ignoring the influence of the weld line and the residual stress on the material performance, and can effectively improve the strength and durability analysis accuracy.

[0019] Additional aspects and advantages of the application will be made apparent by the following description and the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the application will become apparent and be made clear to those skilled in the art from the following description and appended claims, taken in conjunction with the accompanying drawings. Figure 1 Flowchart of a test method of a composite material according to an embodiment of the application; Figure 2 Flowchart of a test method of a composite material according to an embodiment of the application; Figure 3 Block schematic diagram of a test device of a composite material according to an embodiment of the application; Figure 4 Structure schematic diagram of an electronic device according to an embodiment of the application. DETAILED DESCRIPTION

[0021] Embodiments of the application are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the application, and cannot be understood as limiting the application.

[0022] The following description, with reference to the accompanying drawings, outlines a method, apparatus, electronic device, and storage medium for testing composite materials according to embodiments of this application. Addressing the issue of insufficient simulation accuracy caused by neglecting the influence of weld lines and residual stress on material properties in related technologies mentioned in the background, this application provides a method for testing composite materials. In this method, a geometric model of the material to be tested and testing requirements are obtained. The geometric model is processed to obtain an initial injection molding model and a structural analysis model. Injection molding simulation is performed on the initial injection molding model to obtain simulation data, including weld line data and residual stress field data. Based on the weld line data and residual stress field data, the weld lines and residual stress field are mapped to the structural analysis model to obtain a target model. Durability testing is then performed on the target model according to the testing requirements to obtain durability test results. Thus, this application maps the distribution results of weld lines and residual stress to the strength and durability simulation model of the analyzed structure, solving the problem of insufficient simulation accuracy caused by neglecting the influence of weld lines and residual stress on material properties in related technologies, and effectively improving the accuracy of strength and durability analysis.

[0023] Specifically, Figure 1 This is a schematic flowchart illustrating a testing method for composite materials provided in an embodiment of this application.

[0024] like Figure 1 As shown, the testing method for this composite material includes the following steps: In step S101, the geometric model of the material to be tested and the test requirements are obtained.

[0025] The material to be tested is an engineering material object used for strength or durability performance simulation analysis. In this embodiment, glass fiber reinforced thermoplastic composite material is used as an example. The geometric model is a digital solid model describing the three-dimensional shape and internal structure of the part to be tested.

[0026] Specifically, this application's embodiments lay the foundation for subsequent high-precision simulation by acquiring geometric models and testing requirements. On the one hand, it ensures that the simulation object's geometry is consistent with the actual part, avoiding result deviations caused by model simplification and distortion. On the other hand, it incorporates testing requirements (especially considerations of process factors such as weld lines and residual stress) into the analysis framework in advance, guiding the establishment of a simulation model that is closer to the actual service state. This effectively solves the problem of ignoring key weakening factors due to incomplete input information, significantly improving the engineering credibility of subsequent strength and fatigue life predictions.

[0027] In step S102, the geometric model is processed to obtain an initial injection molding model and a structural analysis model. Injection molding simulation is performed on the initial injection molding model to obtain simulation data, which includes weld line data and residual stress field data.

[0028] Furthermore, in some embodiments, injection molding simulation is performed on the initial injection molding model to obtain simulation data, including determining the injection molding analysis type; determining the material type of the initial injection molding model, and establishing a gating system and a cooling system based on the initial injection molding model to obtain a target injection molding model; and performing injection molding simulation on the target injection molding model according to the injection molding analysis type based on preset process parameters to obtain simulation data.

[0029] The initial injection model is a model processed based on the geometric model for injection molding simulation; the structural analysis model is a finite element model used for mechanical performance simulation; the injection analysis types include at least one of cooling, filling, holding pressure and warpage.

[0030] Specifically, injection molding simulation is performed on the initial injection model: first, the injection analysis type is determined, then the material type is determined according to the material to be tested, and the gating system and cooling system are established based on the initial injection model to obtain the target injection model; finally, according to the preset process parameters, the target injection model is subjected to injection molding simulation according to the selected injection analysis type, and simulation data including weld line data and residual stress field data are output.

[0031] In actual implementation, this embodiment can obtain the geometric model of the material to be tested, import the geometric model of the structure into Moldflow analysis software, mesh the geometric model, check the mesh quality, repair meshes that do not meet the requirements to obtain the initial injection molding model; determine the material type of the initial injection molding model, generally the injection molding process analysis includes cooling, filling, holding pressure and warpage processes, and select the material type to use from the Moldflow analysis software material library; in addition, create the gating and cooling system, build the gate and runner models, change the attribute types of the gate and runner, and set process parameters, such as cooling parameters, filling and holding pressure parameters, warpage parameters, etc.; finally, start the injection molding analysis, export the injection molding analysis results UDM file and the weld line and residual stress results XML file.

[0032] Therefore, the embodiments of this application obtain weld line data and residual stress field data that reflect the actual injection molding effect, providing key inputs for subsequent structural analysis that take into account process factors. This avoids the problem of insufficient accuracy caused by ignoring weld lines and residual stress in traditional analysis, making the strength and durability performance evaluation closer to engineering reality, thereby improving the reliability of simulation results.

[0033] In step S103, based on the weld line data and residual stress field data, the weld line and residual stress field are mapped to the structural analysis model to obtain the target model. The durability test is then performed on the target model according to the test requirements to obtain the durability test results.

[0034] Furthermore, in some embodiments, the target model is tested according to the test requirements to obtain the target test result, including: according to the test requirements, using preset stress testing software to perform stress analysis on the target model to obtain stress analysis results; and based on the stress analysis results, using preset fatigue testing software to perform fatigue testing on the target model to obtain the target test result.

[0035] The data includes: weld line data, obtained from injection molding simulation, characterizing the spatial location of weld lines within the part; residual stress field data, obtained from injection molding simulation, characterizing the distribution of residual stress within the part after injection molding; a modified model that integrates weld line and residual stress field information based on the structural analysis model; test requirements: pre-defined durability verification conditions, such as load type, loading method, constraint conditions, and evaluation criteria; stress testing software: finite element analysis software (such as Abaqus, Nastran, etc.) used to calculate the stress response of a structure under load; fatigue testing software: professional software used to predict the fatigue life of materials based on stress results (such as FEMFAT, nCode, etc.).

[0036] It is understood that the embodiments of this application can simulate the entire injection molding process of the material by setting various process parameters. The distribution of weld lines and residual stress is also the result of the combined effect of various process parameters. The parameter settings for simulating the injection molding process in the software are consistent with the actual process parameters. It can be assumed that the weld lines and residual stresses in the simulated injection molding are the same as those in reality. The distribution results of weld lines and residual stresses are mapped to the strength and durability simulation model of the analyzed structure. At this time, the strength and durability simulation results take into account the influence of weld lines and residual stresses, which improves the accuracy of simulation analysis and can better guide the optimization design of glass fiber reinforced thermoplastic composite structures.

[0037] Specifically, firstly, based on weld line data and residual stress field data, the weld line location information and residual stress field are applied to the structural analysis model through a mapping operation to form a target model that includes process influences. Then, durability testing is conducted on this target model according to testing requirements: specifically, a pre-set stress testing software is used to perform stress analysis on the target model according to the testing requirements to obtain stress analysis results; then, based on these stress analysis results, a pre-set fatigue testing software is used to perform fatigue testing on the target model, ultimately obtaining the target test results, i.e., the durability test results.

[0038] In actual implementation, after exporting the injection molding analysis result UDM file and the weld line and residual stress result XML file, the strength and durability analysis model of the structure is imported into Digimat software, and material properties are assigned. The weld line and residual stress results are mapped. Based on Digimat software, the injection molding analysis result UDM file and the weld line and residual stress result XML file are mapped into the strength and durability analysis model. Then, finite element analysis calculation is performed on the model. Specifically, stress analysis of the structure is performed in conjunction with Abaqus software, the analysis results are exported, and durability damage value analysis is performed on the analysis results of the previous step based on Femfat software.

[0039] In general, such as Figure 2 As shown, this embodiment of the application uses Moldflow to perform injection molding simulation analysis of chopped fiber composite structures. The injection molding simulation analysis includes steps such as geometry import, mesh generation and repair, defining the analysis type, selecting the molding material, creating the gating and cooling system, setting process parameters, and injection molding analysis. Then, the injection molding analysis results (UDM file) and weld line and residual stress results (XML file) are exported. The weld line and residual stress results are mapped and finite element analysis is performed. The strength and durability analysis model of the structure is imported into Digimat software. The injection molding analysis results (UDM file) and weld line and residual stress results (XML file) from the previous step are mapped into the strength and durability analysis model, and finite element calculation analysis and result post-processing are performed.

[0040] Therefore, this application's embodiments map the weld lines and residual stress fields generated by the injection molding process to the structural analysis model, constructing a target model that better reflects the actual physical state. Under the guidance of testing requirements, step-by-step stress and fatigue simulations are carried out, ensuring that the durability assessment fully considers the local weakening effect of the material caused by the molding process. This effectively avoids the problem of overestimating the lifespan due to neglecting the deterioration of weld line strength and the superposition effect of residual stress in traditional analyses, significantly improving the accuracy and engineering credibility of durability prediction for glass fiber reinforced thermoplastic composite structures.

[0041] Optionally, in some embodiments, after obtaining the durability test results by performing durability tests on the target model according to the test requirements, the method includes: determining whether the material to be tested meets the preset durability test conditions based on the durability test results; if the material to be tested meets the non-preset durability test conditions, generating an optimization strategy based on the durability test results, and optimizing the durability of the material to be tested according to the optimization strategy.

[0042] Among them, the optimization strategy is the improvement measure proposed based on the specific reasons for not meeting the durability requirements, such as: adjusting the part geometry, modifying the gate position, optimizing the fiber content, or changing the layout of the reinforcing ribs.

[0043] Specifically, after completing the durability test on the target model and obtaining the durability test results, this embodiment further compares the results with preset durability test conditions to determine whether the structure made of the material under test meets the durability requirements. If it is determined that it does not meet the requirements (i.e., the durability test results do not meet the preset conditions), a targeted optimization strategy is automatically generated based on the specific failure mode or weak point (such as high damage area coinciding with weld line). Subsequently, the optimization strategy can be used to guide the adjustment of component geometry, material distribution, or injection molding process, thereby achieving durability optimization of the structure of the material under test.

[0044] Therefore, by introducing an automatic judgment and feedback mechanism based on durability test results, when the structure does not meet durability requirements, the system can quickly locate the root cause of the problem and generate an executable optimization strategy, avoiding repeated trial and error based on human experience.

[0045] In summary, the molding process of glass fiber reinforced thermoplastic composites involves numerous process parameters, such as injection pressure, injection time, mold temperature, and holding time. These parameters all influence the formation of weld lines and residual stress. This application addresses the issue of insufficient accuracy in strength and durability analysis of glass fiber reinforced thermoplastic composites due to the neglect of weld lines and residual stress. It employs the injection molding simulation software Moldflow to simulate the material molding process, setting process parameters such as injection pressure to the actual molding parameters. The simulated injection molding results, weld line distribution, and residual stress distribution are exported. These results are then mapped onto the strength and durability simulation model of the analyzed structure using Digimat software. Finally, the strength and durability performance analysis of the structure is completed using a combination of ABAQUS and FEMFAT software, effectively improving the accuracy of strength and durability analysis for glass fiber reinforced thermoplastic composite structural components.

[0046] According to the composite material testing method proposed in this application, the geometric model and testing requirements of the material to be tested are obtained. The geometric model is then processed to obtain an initial injection molding model and a structural analysis model. Injection molding simulation is performed on the initial injection molding model to obtain simulation data, including weld line data and residual stress field data. Based on the weld line data and residual stress field data, the weld lines and residual stress fields are mapped to the structural analysis model to obtain a target model. Durability testing is then performed on the target model according to the testing requirements to obtain durability test results. Therefore, this application maps the distribution results of weld lines and residual stress to the strength and durability simulation model of the analyzed structure, solving the problem of insufficient simulation accuracy caused by neglecting the influence of weld lines and residual stress on material properties in related technologies, and effectively improving the accuracy of strength and durability analysis.

[0047] Next, the testing apparatus for composite materials according to embodiments of this application is described with reference to the accompanying drawings.

[0048] Figure 3 This is a block diagram of a testing device for composite materials according to an embodiment of this application.

[0049] like Figure 3 As shown, the testing device 10 for the composite material includes: an acquisition module 100, a simulation module 200, and a testing module 300.

[0050] The acquisition module 100 is used to acquire the geometric model and test requirements of the material to be tested.

[0051] The simulation module 200 is used to process the geometric model to obtain the initial injection molding model and the structural analysis model, and to perform injection molding simulation on the initial injection molding model to obtain simulation data, including weld line data and residual stress field data.

[0052] The test module 300 is used to map the weld line and residual stress field to the structural analysis model based on the weld line data and residual stress field data to obtain the target model, and to conduct durability tests on the target model according to the test requirements to obtain the durability test results.

[0053] Optionally, in some embodiments, the simulation module 200 includes: a first determining unit, a second determining unit, and a simulation unit.

[0054] The first determining unit is used to determine the injection molding analysis type.

[0055] The second determining unit is used to determine the material type of the initial injection model and to establish the gating system and cooling system based on the initial injection model to obtain the target injection model.

[0056] The simulation unit is used to perform injection molding simulation on the target injection molding model based on preset process parameters and according to the injection molding analysis type to obtain simulation data.

[0057] Optionally, in some embodiments, the injection molding analysis type includes at least one of cooling, filling, holding pressure, and warpage.

[0058] Optionally, in some embodiments, the test module 300 includes: a first test unit and a second test unit.

[0059] The first testing unit is used to perform stress analysis on the target model using preset stress testing software according to the testing requirements, and obtain stress analysis results.

[0060] The second testing unit is used to conduct fatigue tests on the target model based on the stress analysis results and using preset fatigue testing software to obtain the target test results.

[0061] Optionally, in some embodiments, after obtaining the durability test results by performing a durability test on the target model according to the test requirements, the test module 300 includes: a judgment unit and an optimization unit.

[0062] The judgment unit is used to determine whether the material to be tested meets the preset durability test conditions based on the durability test results.

[0063] The optimization unit is used to generate an optimization strategy based on the durability test results when the material to be tested meets the unpreset durability test conditions, so as to optimize the durability of the material to be tested according to the optimization strategy.

[0064] It should be noted that the foregoing explanation of the test method embodiment for composite materials also applies to the test device for composite materials in this embodiment, and will not be repeated here.

[0065] The composite material testing apparatus proposed in this application obtains the geometric model of the material to be tested and the testing requirements. The geometric model is then processed to obtain an initial injection molding model and a structural analysis model. Injection molding simulation is performed on the initial injection molding model to obtain simulation data, including weld line data and residual stress field data. Based on the weld line data and residual stress field data, the weld lines and residual stress fields are mapped to the structural analysis model to obtain a target model. Durability testing is then performed on the target model according to the testing requirements to obtain durability test results. Therefore, this application maps the distribution results of weld lines and residual stress to the strength and durability simulation model of the analyzed structure, solving the problem of insufficient simulation accuracy caused by neglecting the influence of weld lines and residual stress on material properties in related technologies, and effectively improving the accuracy of strength and durability analysis.

[0066] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: The memory 401, the processor 402, and the computer program stored on the memory 401 and capable of running on the processor 402.

[0067] When processor 402 executes the program, it implements the composite material testing method provided in the above embodiments.

[0068] Furthermore, electronic devices also include: Communication interface 403 is used for communication between memory 401 and processor 402.

[0069] The memory 401 is used to store computer programs that can run on the processor 402.

[0070] The memory 401 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0071] If the memory 401, processor 402, and communication interface 403 are implemented independently, then the communication interface 403, memory 401, and processor 402 can be interconnected via a bus to complete communication between them. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0072] Optionally, in a specific implementation, if the memory 401, processor 402, and communication interface 403 are integrated on a single chip, then the memory 401, processor 402, and communication interface 403 can communicate with each other through an internal interface.

[0073] Processor 402 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of this application.

[0074] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for testing composite materials.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0078] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0079] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method of testing a composite material, characterized by, The method comprises the following steps: obtaining a geometric model of a material to be tested and test requirements; processing the geometric model to obtain an initial injection molding model and a structure analysis model, and performing injection molding simulation on the initial injection molding model to obtain simulation data, wherein the simulation data comprises weld line data and residual stress field data; mapping the weld line and the residual stress field to the structure analysis model based on the weld line data and the residual stress field data to obtain a target model, and performing durability testing on the target model according to the test requirements to obtain a durability test result.

2. The method of claim 1, wherein, The injection molding simulation on the initial injection molding model to obtain simulation data comprises determining an injection molding analysis type; determining a material type of the initial injection molding model, and establishing a gating system and a cooling system based on the initial injection molding model to obtain a target injection molding model; performing injection molding simulation on the target injection molding model according to the injection molding analysis type based on preset process parameters to obtain the simulation data.

3. The method of claim 2, wherein, The injection molding analysis type comprises at least one of cooling, filling, pressure maintaining and warping.

4. The method of claim 1, wherein, The testing on the target model according to the test requirements to obtain a target test result comprises: performing stress analysis on the target model by using a preset stress test software according to the test requirements to obtain a stress analysis result; performing fatigue testing on the target model by using a preset fatigue test software based on the stress analysis result to obtain the target test result.

5. The method of claim 1, wherein, After the durability test on the target model according to the test requirements to obtain the durability test result, the method comprises: determining whether the material to be tested meets preset durability test conditions according to the durability test result; if the material to be tested meets the preset durability test conditions, generating an optimization strategy according to the durability test result to optimize the durability of the material to be tested according to the optimization strategy.

6. A test device for composite materials, characterized in that The method comprises: an obtaining module configured to obtain a geometric model of a material to be tested and test requirements; a simulation module configured to process the geometric model to obtain an initial injection molding model and a structure analysis model, and perform injection molding simulation on the initial injection molding model to obtain simulation data, wherein the simulation data comprises weld line data and residual stress field data; a testing module configured to map the weld line and the residual stress field to the structure analysis model based on the weld line data and the residual stress field data to obtain a target model, and perform durability testing on the target model according to the test requirements to obtain a durability test result.

7. The apparatus of claim 6, wherein, The simulation module comprises: a first determining unit configured to determine an injection molding analysis type; a second determining unit configured to determine a material type of the initial injection molding model, and establish a gating system and a cooling system based on the initial injection molding model to obtain a target injection molding model; a simulation unit configured to perform injection molding simulation on the target injection molding model according to the injection molding analysis type based on preset process parameters to obtain the simulation data.

8. The apparatus of claim 6, wherein, The injection molding analysis type comprises at least one of cooling, filling, pressure maintaining and warping.

9. An electronic device, comprising: The method comprises: - a memory, a processor and a computer program stored on the memory and runable on the processor, the processor executing the program to implement the test method of a composite material as claimed in any one of claims 1 to 5.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor for implementing the test method of a composite material as claimed in any one of claims 1 to 5.

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