Composite material performance evaluation method, device, electronic device and storage medium

Abstract

The present application provides a performance evaluation method, device, electronic device and storage medium for a composite material provided by the present application, which can better simulate and accelerate the complex environmental effects experienced by composite materials products based on the life history and environmental profile of the composite materials, so that the evaluation process has better accelerability for complex environmental effects. The feasibility is improved by constructing a comprehensive accelerated test spectrum, and the activation energy parameters are used to achieve quantifiable evaluation, so that the evaluation process has strong universality and can be applied to most products composed of composite materials. In the accelerated aging process, sufficient data is obtained through regular testing, and then a more accurate performance change law of the composite material is obtained, thereby improving the accuracy of the evaluation.

Description

Technical Field

[0001] The present application relates to the technical field of material evaluation, and in particular to a method, device, electronic device, and storage medium for evaluating the performance of a composite material. Background Art

[0002] Composite materials, with their advantages of lightweight, high strength, high toughness, and recyclability, are attracting unprecedented attention. They have shown promising application prospects in cutting-edge technologies such as aviation, aerospace, navigation, automotive, and high-speed rail. For example, glass fiber-reinforced composites, made with synthetic resins as binders and glass fibers and their products as reinforcements, are also known as fiberglass reinforced plastics (FRP) due to their high strength, comparable to that of steel. FRP's high specific strength, resistance to seawater corrosion, smooth surface, excellent anti-microbial adhesion, and impact energy absorption offer a wide range of design options. Furthermore, FRP's excellent antimagnetic, soundproofing, electrical insulation, and radar non-reflection properties make it a uniquely advantageous material for various equipment applications. However, the increasing complexity and diversity of operating environments, coupled with the frequent, random, and cross-linked nature of composite structural damage, have led to an increasing number of catastrophic accidents, posing a serious threat to the safety of composite materials. This can easily lead to sudden equipment failure without early warning. Factors such as inherent material defects, manufacturing flaws, and media corrosion can all cause excessive deformation and fracture failure in composite structures. Developing effective methods to assess the safety of composite materials is a key challenge that urgently needs to be addressed. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a composite material performance evaluation method, device, electronic device and storage medium for effectively evaluating composite materials.

[0004] Based on the above objectives, the first aspect of the present application provides a method for evaluating the performance of a composite material, comprising:

[0005] Determine the sensitive environmental factors and cumulative exposure time of composite materials at different working stages;

[0006] determining the environmental stress of the composite material at different working stages according to the sensitive environmental factors;

[0007] determining the duration of different environmental stresses according to the cumulative action time and the activation energy parameter of the composite material;

[0008] determining a comprehensive accelerated test profile of the composite material based on the duration and the environmental stress;

[0009] Performing aging treatment and regular testing on the composite material according to the comprehensive accelerated test spectrum to obtain test results;

[0010] An environmental adaptability assessment is performed on the composite material according to the test results to determine a target composite material that meets the adaptability requirements.

[0011] A second aspect of the present application provides a composite material performance evaluation device, comprising:

[0012] The parameter determination module is configured to: determine the sensitive environmental factors and cumulative action time of the composite material at different working stages;

[0013] A stress determination module is configured to: determine the environmental stress of the composite material at different working stages according to the sensitive environmental factors;

[0014] a time determination module, configured to: determine the duration of different environmental stresses according to the accumulated action time;

[0015] an experimental spectrum determination module, configured to: determine a comprehensive accelerated test spectrum of the composite material according to the duration and the environmental stress;

[0016] an aging detection module configured to: perform aging treatment and regular detection on the composite material according to the comprehensive accelerated test spectrum to obtain a detection result;

[0017] The material evaluation module is configured to: perform environmental adaptability evaluation on the composite material according to the detection result to determine a target composite material that meets the adaptability requirements.

[0018] The 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 when the processor executes the program, the method provided in the first aspect of the present application is implemented.

[0019] The fourth aspect of the present application provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a computer to execute the method provided in the first aspect of the present application.

[0020] As can be seen from the above, the performance evaluation method, device, electronic device, and storage medium provided by this application can determine the sensitive environmental factors and cumulative exposure time of the composite material at different working stages. It can also effectively simulate and accelerate the complex environmental effects experienced by the composite material product based on the life cycle and environmental profile of the composite material, making the evaluation process more accelerable to complex environmental effects. Then, the environmental stress of the composite material at different working stages is determined based on the sensitive environmental factors and the activation energy parameters of the composite material; the duration of different environmental stresses is determined based on the cumulative exposure time; and a comprehensive accelerated test spectrum of the composite material is determined based on the duration and environmental stress. The constructed comprehensive accelerated test spectrum improves feasibility, and the use of activation energy parameters to achieve quantifiable evaluation makes the evaluation process highly universal and applicable to most products composed of composite materials. Finally, the composite material is aged and regularly tested based on the comprehensive accelerated test spectrum to obtain test results. Based on the test results, the environmental adaptability of the composite material is evaluated to determine the target composite material that meets the adaptability requirements. During the accelerated aging process, sufficient data is obtained through regular testing, thereby obtaining a more accurate performance change pattern of the composite material and improving the accuracy of the evaluation. By applying accelerated environmental stresses that simulate sensitive environmental factors at various stages of the product life cycle, a survey and verification evaluation study is conducted on the performance stability and environmental adaptability of composite materials during long-term storage and service in harsh, hot and humid environments. This exposes the weak links in materials and processes of composite materials, obtains the complex environmental effects and damage patterns of composite materials, and evaluates the influence of activation energy parameters of composite materials on storage life under the combined action of complex environmental factors. This provides data support for the evaluation of adaptability of products equipped with composite materials to complex natural environments, so as to determine target composite materials that meet the adaptability requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a flow chart of a method for evaluating the performance of a composite material according to an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the comprehensive accelerated test spectrum of the embodiment of the present application;

[0024] Figure 3 Flowchart for determining sensitive environmental factors and cumulative action time for an embodiment of the present application;

[0025] Figure 4 Flowchart for determining environmental stress for an embodiment of the present application;

[0026] Figure 5 Flowchart for determining duration for an embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of a composite material product according to an embodiment of the present application using durable vibration;

[0028] Figure 7 Flowchart for determining a comprehensive accelerated test profile for an embodiment of the present application;

[0029] Figure 8 This is a flow chart of aging detection in an embodiment of the present application;

[0030] Figure 9 A flow chart for evaluating materials for the embodiments of this application;

[0031] Figure 10 This is a schematic structural diagram of a performance evaluation device for composite materials according to an embodiment of the present application;

[0032] Figure 11 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0034] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] It should be understood herein that any number of elements in the drawings is for illustration only and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0036] Based on the description of the above background technology, the following situations also exist in the related art:

[0037] Products equipped with composite materials spend the vast majority of their storage and operation periods exposed or simply shielded, subjecting them to the combined corrosive effects of harsh outdoor environments such as high temperature, high humidity, salt spray, solar radiation, and wind loads. Furthermore, in addition to the harsh outdoor atmospheric conditions of storage and operation, they must also withstand vibration and high loads caused by regular on-duty transportation, erection, and operation. Taking resin-based composites as an example, due to the properties of their constituent materials and manufacturing processes, the reinforcing fibers and the resin matrix exhibit significant differences in thermal and mechanical properties. Temperature and humidity fluctuations can easily cause deformation mismatches between the two, leading to residual stress and localized stress concentrations at the material interface. Long-term exposure to high temperature and high humidity can easily absorb moisture and cause swelling, reducing the matrix's adhesion to the fibers or leading to direct interfacial debonding and delamination. Furthermore, factors such as high temperature, high humidity, and solar radiation can cause chemical reactions in the composite material, including hydrolysis, oxidation, degradation, and crosslinking. This can damage the matrix itself and create internal voids and defects, directly contributing to interfacial delamination and overall performance degradation.

[0038] Furthermore, to meet the requirements of environmental corrosion resistance, lightweight, high-strength, and structural weight reduction for products equipped with composite materials, most products utilize a structural form in which functional composite components are pre-embedded and fastened to various metal parts. This inevitably results in a combination of composite materials coupled with various metal materials. These material combinations often have large gaps and potential differences between them, making them highly susceptible to corrosion damage under corrosion and cyclic loading, which can develop into new crack sources or hazardous areas. In addition to the degradation or failure modes of the composite materials themselves, such as environmental aging, interfacial delamination, debonding, and decreased mechanical properties, the connections between the composite materials and various metal components can produce strong galvanic corrosion under high temperature and humidity conditions due to the large potential difference between the composite materials and the metal materials. This accelerates the aging and corrosion process of the product's local connection structure, leading to failure modes such as local rupture and leakage, seal failure, fastener breakage and loss of function, and internal insulation shedding. Whether these composite materials and connection structures can withstand the corrosion and aging effects of the marine atmospheric environment during long-term storage of the product and maintain the required sealing, thermal insulation, mechanical properties and structural integrity functions is directly related to the product's storage life and safety, reliability and other indicators.

[0039] In related technologies, evaluating sensitive environmental factors in a single environment or a single product life cycle, or simply combining evaluations, will lead to large differences between the evaluation results and the actual application environment, making the evaluation results inaccurate, which in turn affects the product's storage life and safety, reliability and other indicators.

[0040] The performance evaluation method, device, electronic device and storage medium of the composite material provided in the embodiments of the present application can determine the sensitive environmental factors and cumulative exposure time of the composite material at different working stages; can better simulate and accelerate the complex environmental effects experienced by the composite material product based on the life history and environmental profile of the composite material, so that the evaluation process has better accelerability for complex environmental effects. Then, the environmental stress of the composite material at different working stages is determined based on the sensitive environmental factors and the activation energy parameters of the composite material; the duration of different environmental stresses is determined based on the cumulative exposure time; and the comprehensive accelerated test spectrum of the composite material is determined based on the duration and environmental stress. The feasibility is improved by constructing a comprehensive accelerated test spectrum, and the activation energy parameters are used to achieve quantifiable evaluation, making the evaluation process highly universal and applicable to most products made of composite materials. Finally, the composite material is aged and regularly tested based on the comprehensive accelerated test spectrum to obtain test results; based on the test results, the environmental adaptability of the composite material is evaluated to determine the target composite material that meets the adaptability requirements. During the accelerated aging process, sufficient data is obtained through regular testing, thereby obtaining a more accurate performance change pattern of the composite material and improving the accuracy of the evaluation. By applying accelerated environmental stresses that simulate sensitive environmental factors at various stages of the product life cycle, a survey and verification evaluation study is conducted on the performance stability and environmental adaptability of composite materials during long-term storage and service in harsh, hot and humid environments. This exposes the weak links in materials and processes of composite materials, obtains the complex environmental effects and damage patterns of composite materials, and evaluates the influence of activation energy parameters of composite materials on storage life under the combined action of complex environmental factors. This provides data support for the evaluation of adaptability of products equipped with composite materials to complex natural environments, so as to determine target composite materials that meet the adaptability requirements.

[0041] A power control method for a fuel cell according to an exemplary embodiment of the present application will be described below with reference to the accompanying drawings.

[0042] In some embodiments, as Figure 1 A method for evaluating the performance of a composite material is shown, comprising:

[0043] Step 101: Determine the sensitive environmental factors and cumulative exposure time of the composite material at different working stages.

[0044] In specific implementation, products equipped with composite materials must go through stages such as warehouse storage, testing, and outdoor use during the entire life cycle of delivery and use, and withstand a variety of atmospheric environmental factors and induced mechanical loads such as high temperature, low temperature, temperature cycle, humidity, solar radiation, salt spray, vibration, impact, etc. Through product life profile analysis, it is found that the time for outdoor testing and outdoor use each accounts for half of the outdoor environment time, and is shorter than the warehouse storage time. The relatively harsh humid and hot marine atmospheric environment conditions are selected to study the complex environmental effects of products equipped with composite materials. Among them, the sensitive environmental factors of each stage of the product's life cycle are different, because the main environmental factors that cause product aging are different in different stages of the product's life cycle. For example, the environmental conditions of the main working stages during the product's life cycle are shown in Table 1:

[0045] Table 1 Environmental conditions of the main working stages during the product life cycle

[0046]

[0047] Among them, 1) Warehouse storage period: standard warehouse, temperature range: 0℃~+30℃, humidity range: 35%~70%; cumulative time: 10 years.

[0048] 2) Outdoor test period: simple warehouse or shed environment, using typical marine atmospheric test station warehouse environment data, temperature range: +12.6℃~+35.4℃, annual average 26.9℃; humidity range: 61%~91%, annual average 80%; detection range of sea salt ions in atmospheric pollutants: 0.0010~0.0042mg / (100cm 2 ·d), annual average 0.0021mg / (100cm 2 d); Cumulative duration of action: 3 years.

[0049] 3) Outdoor use period: outdoor exposure environment. Using the outdoor exposure field environmental data of a typical marine atmospheric test station, the temperature range is: +9.4℃~+35.9℃, average 25.1℃; humidity range is: 36%~98%, average 84%; the detection range of sea salt ions in atmospheric pollutants is: 0.1122~0.7969mg / (100cm 2 ·d), with an annual average of 0.3467 mg / (100 cm 2 d); daily average solar radiation: 1420 J / (cm 2 d) The temperature during use varies from -55°C to +70°C. The cumulative duration of use is 3 years.

[0050] It should be noted that the division can also be performed in other ways, such as into indoor stages and outdoor stages, which is not specifically limited here.

[0051] Step 102: Determine the environmental stress of the composite material at different working stages according to the sensitive environmental factors and the activation energy parameters of the composite material.

[0052] In specific implementation, due to the different sensitive environmental factors at different stages, the environmental stress of the composite material determined according to the activation energy parameters of the composite material at different working stages will naturally be different. In order to avoid interference from non-sensitive environmental factors, only the environmental stress corresponding to the sensitive environmental factors is considered. When calculating the environmental stress, different acceleration models are selected for aging treatment based on the activation energy parameters of the composite material. For example, based on the environmental profile of the product life cycle, actual conditions and sensitive environmental factors, the environmental factors, acceleration methods and models to be accelerated, and the test item arrangement for the accelerated test of complex environmental effects of composite materials are shown in Table 2:

[0053] Table 2 Relationship between accelerated test methods and models for complex environmental effects of composite materials

[0054]

[0055] That is, Table 2 determines the correspondence between sensitive environmental factors, environmental stresses, and the acceleration model used in the calculation process.

[0056] Step 103: Determine the duration of different environmental stresses according to the cumulative action time and the activation energy parameter of the composite material.

[0057] During implementation, the acceleration process first requires determining the acceleration factor, which refers to the ratio between the actual usage time (in years) and the duration (in days, hours, or minutes). For example, if the acceleration factor is 210.0, it means that 1.74 days of aging treatment is equivalent to the aging degree of 1 year of actual use. That is, 365 / 210.0 = 1.74 days. Therefore, when the acceleration factor is 210.0, the cumulative action time of 10 years of storage in the warehouse is equivalent to the duration of 17.4 days of aging treatment, achieving accelerated aging of the composite material.

[0058] Step 104: Determine a comprehensive accelerated test spectrum of the composite material based on the duration and the environmental stress.

[0059] In specific implementation, a test spectrum coordinate system is constructed with environmental stress as the vertical axis and test time as the horizontal axis. The comprehensive accelerated test spectrum of the composite material is determined based on the duration and environmental stress on the test spectrum coordinate system. For example, the specific form of the comprehensive accelerated test spectrum is as follows: Figure 2 shown.

[0060] Step 105: Perform aging treatment and regular testing on the composite material according to the comprehensive accelerated test spectrum to obtain test results.

[0061] When implementing it specifically, Figure 2The figure only shows the process of one aging treatment test in the multi-cycle test. After the test is completed, a performance test is performed to achieve regular testing and obtain the test results of the multi-cycle aging treatment. Among them, an initial test is required before the aging treatment. That is, an initial test is performed on the original composite material that has not been aged. The initial test results are recorded and used as a benchmark and reference for subsequent regular test data comparison.

[0062] Step 106: Evaluate the environmental adaptability of the composite material based on the test results to determine a target composite material that meets the adaptability requirements.

[0063] When implementing it specifically, Figure 2 As shown, the three groups of composite materials only change the humidity stress in the damp heat test conditions, and the combined temperature conditions and other test stress conditions remain unchanged. Therefore, the aging treatment process of each cycle can be regarded as three groups of stress level constant stress accelerated life tests with humidity as the accelerated stress, that is, the test process in the embodiment of the present application is the aging treatment process. The environmental adaptability is evaluated based on the test result data of the comprehensive accelerated test of the complex environmental effects of composite materials simulating the storage-use history. During and after the test, if the composite material performance test results are within the specified range of the product design indicators, it is considered that the composite material product meets the design requirements for adaptability to harsh and complex environments (storage-service life) and can be used as the target composite material for actual use.

[0064] In some embodiments, as shown in Table 1 and Table 2, the working stage includes a storage stage, a test stage, and a use stage; the sensitive environmental factors and the cumulative action time of the composite material in different working stages are determined, such as Figure 3 Shown, including:

[0065] Step 301: In response to the working stage being the storage stage, the sensitive environmental factors include temperature, and the accumulated action time is the first time.

[0066] In specific implementation, as shown in Table 1, when the working stage is the storage stage, the environmental factors include temperature and humidity. However, the environment in the storage stage is a standard warehouse. The temperature range of the standard warehouse is: 0℃~+30℃, and the annual average temperature is about 20℃. Therefore, the temperature is relatively stable and not too high. Moreover, the temperature of the standard warehouse is relatively easy to adjust. Therefore, temperature is a non-sensitive environmental factor in the storage stage. The humidity range is: 35%~70%, and the annual average humidity is 50%. It can be seen that the humidity varies greatly and the annual average humidity is high. Therefore, compared with temperature, humidity has a greater impact on the aging of the composite material. Therefore, temperature is determined as a sensitive environmental factor. Optionally, the first time as the cumulative action time can be 10 years (this may vary for different composite materials and is determined based on actual conditions and is not limited here).

[0067] Step 302: In response to the test phase being the test phase, the sensitive environmental factors including temperature and humidity, and the accumulated action time being the second time; wherein the first time is greater than the second time.

[0068] In specific implementation, as shown in Table 1, when the working stage is the test stage, the environmental influencing factors include temperature, humidity and sea salt ions. The environment in the test stage is a simple warehouse or under-shed environment. The typical marine atmospheric test station warehouse environment data is used. The temperature range of the simple warehouse or under-shed environment is: +12.6℃~+35.4℃, and the annual average temperature is about 26.9℃. Therefore, the temperature changes greatly and the average value is large, and effective temperature adjustment cannot be performed outdoors. Therefore, temperature is a sensitive environmental factor in the test stage; and the humidity range is: 61%~91%, and the annual average humidity is 80%. It can be seen that the humidity changes greatly and the annual average humidity is high, so temperature is determined to be a sensitive environmental factor. The detection range of sea salt ions in atmospheric pollutants is: 0.0010~0.0042mg / (100cm 2 ·d), with an annual average of 0.0021 mg / (100 cm 2 d); However, due to the large variations in the range of sea salt ions in atmospheric pollutants under different usage environments, sea salt ions are determined to be a non-sensitive environmental factor. (If it is determined that the test scenario of the composite material has a widely varying sea salt ion detection range and the annual average value is also relatively high, it can be considered a sensitive environmental factor.) Optionally, the second time period serving as the cumulative action time can be three years. The specific value can be changed based on actual conditions, but generally, the first time period needs to be greater than the second time period.

[0069] Step 303: In response to the working stage being the use stage, the sensitive environmental factors include temperature and humidity, humidity, temperature alternation, solar radiation, vibration and impact, and the accumulated action time is a third time, wherein the first time is greater than the third time.

[0070] In specific implementation, as shown in Table 1, when the working stage is the use stage, the environmental influencing factors include humidity, humidity, sea salt ions, temperature alternation, solar radiation, vibration and impact. The environment in the use stage is an outdoor exposure environment, and the outdoor exposure field environmental data of a typical marine atmospheric test station is used. The temperature and humidity in the outdoor exposure environment may be more severe than the environment in a simple warehouse or shed, so humidity and temperature can naturally be used as sensitive environmental factors. Sea salt ions are still used as non-sensitive environmental factors due to scene problems. Daily average solar radiation: 1420J / (cm 2·d); Temperature alternation during use: -55℃~+70℃. The influence of solar radiation and weather temperature changes cannot be avoided in an outdoor exposed environment, so temperature alternation and solar radiation can be used as sensitive environmental factors. During transportation and use, shock and vibration are inevitable, so shock and vibration can also be used as sensitive environmental factors. Optionally, the third time as the cumulative action time can be 3 years. The specific value can be changed according to actual conditions, but it is generally necessary to make the first time greater than the third time. Starting from the life history and environmental profile of the composite material, it is possible to better simulate and accelerate the complex environmental effects experienced by the composite material products, so that the evaluation process has better accelerability for complex environmental effects.

[0071] In some embodiments, as Figure 4 As shown in Figure 2, the environmental stress of composite materials at different working stages is determined based on sensitive environmental factors and activation energy parameters of composite materials, including:

[0072] Step 401: In response to the working stage being the storage stage, high temperature stress is determined according to the temperature of the storage stage.

[0073] In specific implementation, if the working stage is the storage stage and the only sensitive environmental factor is temperature, then only high-temperature stress corresponding to the temperature exists.

[0074] Step 402: In response to the working phase being a test phase, determining a first hygrothermal stress according to the temperature and humidity of the test phase.

[0075] In specific implementation, if the working phase is the test phase and the sensitive environmental factors are temperature and humidity, only the temperature and humidity stress corresponding to the temperature exists.

[0076] Step 403: In response to the working stage being the use stage, a second hygrothermal stress is determined according to the temperature and humidity in the use stage, a radiation intensity is determined according to the solar radiation in the use stage, a vibration stress is determined according to the vibration in the use stage, a temperature cycling stress is determined according to the temperature change in the use stage, and an impact stress is determined according to the impact in the use stage.

[0077] In specific implementations, if the operating phase is the use phase, the second hygrothermal stress is determined based on the temperature and humidity during the use phase, the radiation intensity is determined based on the solar radiation during the use phase, the vibration stress is determined based on the vibration during the use phase, the temperature cycling stress is determined based on the temperature fluctuations during the use phase, and the impact stress is determined based on the impact during the use phase. It should be noted that in the embodiments of this application, it is not necessary to determine the value of the environmental stress; only the type of environmental stress needs to be determined. For example, high-temperature stress can be achieved by simply placing the composite material in a preset temperature environment to achieve aging, and the specific stress does not need to be determined.

[0078] In some embodiments, as Figure 5As shown in Figure 2, the duration of different environmental stresses is determined based on the cumulative action time and the activation energy parameters of the composite material, including:

[0079] Step 501: Determine acceleration coefficients for different environmental stresses based on a preset acceleration model and activation energy parameters of the composite material.

[0080] In specific implementation, the specific sensitive environmental stress acceleration model and the calculation method of the acceleration coefficient are as follows:

[0081] 1) Temperature thermal aging acceleration:

[0082] The storage period in the warehouse is mainly affected by temperature. The Arrhenius acceleration model used under temperature thermal aging conditions is as follows:

[0083] ξ=Ae E / KT (1)

[0084] Where ξ is the product life characteristic, such as average life, median life, characteristic life, etc.; A is a constant; E is the product activation energy parameter, which is related to the material composition of the composite material; K is the Boltzmann constant, equal to 8.617×10-5eV / ℃; T is the absolute temperature.

[0085] Given that the average storage temperature in the warehouse is 20°C and the activation energy of the composite material is temporarily taken as 0.7 eV, considering the test cycle limit and failure mechanism consistency, if 70°C is selected as the accelerated aging test condition, the acceleration factor AF(70°C)-(20°C) = 56.9, which means that approximately 6.4 days is equivalent to 1 year of thermal aging in the field. If 80°C is selected as the accelerated aging test condition, the acceleration factor AF(80°C)-(20°C) = 111.3, which means that approximately 3.3 days is equivalent to 1 year of thermal aging in the field. If 90°C is selected as the accelerated aging test condition, the acceleration factor AF(90°C)-(20°C) = 210.0, which means that approximately 1.74 days is equivalent to 1 year of thermal aging in the field.

[0086] 2) Hygroscopic effect accelerates aging:

[0087] In a hot and humid environment, the dual-stress Irene acceleration model with constant temperature and humidity is mainly used, namely:

[0088]

[0089] Where ξ is a lifetime characteristic; K is the Boltzmann constant, equal to 8.617×10-5 eV / °C; T is the absolute temperature; E is the activation energy of the composite material, and S represents humidity; A, B, and C are constants related to material properties, product design, etc.; the last term in equation (2) represents the interaction between T and S; if the interaction does not exist, C = 0. For temperature-humidity dual stress, equation (2) can be further expressed as the Peck model:

[0090]

[0091] Where RH represents relative humidity; A is a constant; B is an inverse power index of 1 to 9. According to the relevant provisions of IEC62059-31, B is generally taken as 3.

[0092] Substituting the accelerated temperature-humidity conditions (T', RH') and the reference temperature-humidity conditions (T, RH) into formula (3), we can obtain the accelerated life characteristic value ξ' and the reference life characteristic value ξ. By calculating the ratio of the reference life characteristic value to the accelerated life characteristic value, we can obtain the acceleration factor (AF) of temperature-humidity (T', RH') to (T, RH):

[0093]

[0094] Considering the high thermal stability and density of the protective coating composite material, an activation energy of 0.7 eV was selected. Given that the average temperature and humidity during the testing phase were 26.9°C and 80% RH, respectively, and the average temperature and humidity during the operational phase were 25.1°C and 84% RH, respectively, the average humidity and humidification conditions were uniformly set at 26°C and 82% RH. Considering the test cycle limitations and failure mechanism consistency, if 70°C and 95% RH were selected as the accelerated aging test conditions, the acceleration factor AF (70°C, 95%) - (26°C, 82%) = 50.8, meaning approximately 7.2 days is equivalent to one year of field humidity and humidification aging. If 80°C and 95% RH were selected as the accelerated aging test conditions, the acceleration factor AF (80°C, 95%) - (26°C, 82%) = 99.26, meaning approximately 88.26 hours is equivalent to one year of field humidity and humidification aging.

[0095] 3) Photothermal / UV aging acceleration:

[0096] For the solar radiation environmental factor, most of the current methods use the method of equalizing the radiation energy inside and outside the field to accelerate the process. It is known that the average daily solar radiation in the outdoor exposure area is 1420 (J / (cm 2 d)), so the average annual total radiation in this area is: Q = 1420 × 10000 × 365 = 518.3 × 107 J / m2. The irradiation power of the solar irradiation test chamber is: 50 ≤ P ≤ 1120 W / m2, and the temperature does not exceed 60°C. The test intends to use a steady-state temperature of 50°C and an irradiation power of 1120 W / m2. The total test time is T = Q / (P × 3600) = 1285.5 hours. This means that 53.6 days of irradiation in the test chamber is approximately equivalent to one year's total field radiation. Since the product is exposed to solar radiation for one month each year during its outdoor use, 4.47 days of irradiation in the solar irradiation test chamber is approximately equivalent to one month's outdoor radiation.

[0097] 4) Acceleration of temperature stress mutation:

[0098] Products equipped with composite materials need to withstand cyclic mechanical stress caused by several large temperature changes during outdoor use, which may cause fatigue and peeling of the coating. The temperature cycle stress acceleration model adopts the Coffin-Manson model recommended in MIL-HDBK-340A, that is,

[0099] ΔT P N=C(5)

[0100] Where N is the number of cycles, ΔT is the temperature difference of the temperature cycle, C is a constant, and the fatigue index factor p is 1.4 to 2. We get:

[0101]

[0102] It is known that the product's outdoor operating temperature range is -55°C to +70°C, with a temperature gradient of 125°C. Without changing the product's failure mode and mechanism, the operating limits and stability of the test chamber were considered, with a low temperature of -60°C. Furthermore, to avoid altering the failure mechanism of the protective coating's aluminum alloy substrate, a high temperature of 90°C was chosen. The temperature cycling accelerated stress was then proposed to be between -60°C and +90°C, with a temperature gradient of 150°C. The temperature cycling test consisted of a 1-hour hold at high temperature and a 1-hour hold at low temperature, with a temperature gradient of 5°C / min, a p value of 1.5, and 228 cycles. The calculated acceleration factor was approximately 1.32.

[0103] 5) Transformation of damage such as vibration fatigue:

[0104] According to the vibration fatigue relationship specified in GJB150.16A-2009, it can be used to determine the fatigue equivalence relationship of different vibration environments, accumulate the vibration fatigue damage generated by various vibration environments, and determine the accelerated test value of the vibration endurance test. The simplified expression of linear fatigue damage accumulation is as follows:

[0105] (W0 / W1) b =(t1 / t0) (7)

[0106] Where W0 and W1 are the specified and applied random vibration levels (power spectral density), g 2 / Hz; t0 and t1 are the prescribed and applied times, min; b is the material constant (slope of the fatigue curve), and the index value is generally 3.25 to 6.6 depending on the equipment type. In the embodiment of the present application, b=4 is proposed.

[0107] According to the dynamic characteristics of the composite product installation structure and the analysis of the vibration pre-test results, the vibration simulation adopted the damage conversion method of maintaining the same spectrum, reducing the magnitude (not lower than the functional vibration condition), and prolonging the vibration time. That is, W1 = 0.105, W0 = 0.168 and t0 = 183 min are set as known conditions. Substituting them into formula (7), the set vibration time is approximately t1 = 1199.3 min (equivalent to 16 years). Combined with the setting of the accelerated test detection cycle, the time equivalent to vibrating once every 6 months is approximately T5 = t1 / 32 = 37.5 min.

[0108] 6) Impact and other damage conversion:

[0109] Based on the impact conditions of outdoor use of equipment and the characteristics of composite materials, this impact test does not perform equal damage conversion processing. The test conditions are consistent with the product benchmark assessment conditions. The number of impacts can be evenly divided according to the number of cycles of the accelerated test spectrum performed, that is, the number of impacts = 300 / number of cycles.

[0110] Step 502: Determine the duration of different environmental stresses according to the accumulated action time and the acceleration coefficient.

[0111] The acceleration coefficients of the hygrothermal stress are set to multiple groups, and the hygrothermal stress includes a first hygrothermal stress and a second hygrothermal stress.

[0112] In specific implementation, based on the accelerated method and model of sensitive environmental stress of composite materials and the benchmark environmental conditions during product storage, testing and use, the accelerated aging items and conditions for simulating the complex environmental effects of material environmental aging and stress damage are set as follows:

[0113] 1) High temperature accelerated aging:

[0114] Selecting 90℃ as the warehouse storage temperature accelerated aging test condition, the acceleration factor AF(90℃)-(20℃)=210.0, that is, the test time of 417.6h (17.4 days) is equivalent to 10 years of warehouse storage. According to the complex environmental effects of product environmental aging-stress damage comprehensive accelerated test profile (see Figure 2 ) performs 7 calculations, then the duration of the high temperature aging test of a single test spectrum is approximately t1 = 60h.

[0115] 2) Humidity and heat accelerated aging:

[0116] The damp heat test conditions are set to three groups, namely (80℃, 75%RH), (80℃, 85%RH) and (80℃, 95%RH), and the corresponding equivalent acceleration factors are: 48.83, 71.09 and 99.26, that is, about 179.4h, 123.23h and 88.26h are equivalent to the damp heat aging degree of one year in the field. It is known that the outdoor test and use period is 6 years. According to the comprehensive accelerated test profile of complex environmental effects (see Figure 2 ) performs 7 calculations, then the duration t2 of the damp heat test of a single test spectrum is 153.8h, 105.7h and 75.7h respectively, and the heating and cooling rate is no more than 1℃ / min.

[0117] 3) Solar radiation accelerates aging:

[0118] Given that the required equivalent actual use time is three years (a three-month irradiation period), the total solar irradiation test duration is 13.4 days (321.6 hours). To fully simulate the alternating effects of day and night and thermal stress in the natural environment, the test adopts a 24-hour cycle with a four-hour non-irradiation period in accordance with the relevant test principles of GJB150.7A-2009 Procedure II. The specific solar irradiation test conditions are as follows:

[0119] (a) Test conditions: Steady-state test, temperature 50°C, radiant power 1120 W / m2, humidity uncontrolled;

[0120] (b) Test procedure II: 24 h (including a 4 h non-irradiation period);

[0121] (c) Total test time: 321.6 h;

[0122] (d) Single cycle test time: t3 = 48 h (2 procedures);

[0123] (e) Number of cycles: 7 times.

[0124] 4) Temperature cycling accelerates aging:

[0125] The specific settings of the temperature cycle test conditions are as follows:

[0126] (a) High temperature: 90°C, hold time 1h;

[0127] (b) Low temperature: -60°C, hold time 1h;

[0128] (c) Temperature rate: 5°C / min;

[0129] (d) Single cycle test time: t4 = 93h;

[0130] (e) Number of cycles: 7 times.

[0131] 5) Vibration accelerates aging:

[0132] The product design vibration conditions are converted into simulated endurance vibration conditions. The vibration test conditions for this use are intended to directly adopt the accelerated product vibration conditions, such as Figure 6 As shown, if vibration stress is applied only in the sensitive direction of the composite material (unidirectional), the duration of the vibration test for a single cycle is t5 = 183 / 7 = 27 minutes (approximately 0.44 hours). The actual test vibration level and duration should be adjusted based on the sample's vibration pre-test response to avoid mechanical overstress damage to the composite material.

[0133] 6) Impact accelerated aging:

[0134] During the impact accelerated aging process, equal damage conversion is not performed. The impact conditions designed for composite materials are adopted, namely, a half-sine waveform, a peak value of 12g, a duration of 20ms to 40ms, 300 times, and the interval between two impacts is not less than 2s. The number of impacts in each cycle is 300 / 7=43 times.

[0135] In some embodiments, as Figure 7 As shown, a comprehensive accelerated test spectrum for composite materials is determined based on duration and environmental stress, including:

[0136] Step 701: Determine the single duration of different environmental stresses in a word cycle according to the preset number of cycles and duration.

[0137] In a specific implementation, illustratively, the number of cycles is 7 times, the duration of a single cycle is t1 to t5, and the time of 43 impacts.

[0138] Step 702: Construct a test spectrum coordinate system with environmental stress as the vertical axis and time as the horizontal axis.

[0139] When implementing it specifically, Figure 2 As shown, the test spectrum coordinate system is constructed with environmental stress as the vertical axis and time as the horizontal axis.

[0140] Step 703: Sort the single durations in the order of the storage phase, the test phase, and the use phase to obtain a single test spectrum.

[0141] In specific implementation, the single duration t1 to t5 and the time of 43 impacts are sorted in the order of storage stage, test stage and use stage, and the following is obtained: Figure 2 Single trial spectrum shown.

[0142] Step 704: splice the single test spectra according to the number of cycles to obtain a comprehensive accelerated test spectrum.

[0143] When it is implemented, Figure 2The single test profile shown is executed seven times to create a comprehensive accelerated test profile. This comprehensive accelerated test profile improves feasibility and uses activation energy parameters to achieve quantifiable evaluation, making the evaluation process highly universal and applicable to most products made of composite materials.

[0144] In some embodiments, as Figure 8 As shown, the composite materials are aged and tested regularly according to the comprehensive accelerated test spectrum, and the test results include:

[0145] Step 801: Before performing aging treatment on the composite material, perform initial testing on the composite material to obtain initial testing results.

[0146] In specific implementation, the initial inspection is to conduct appearance inspection and performance inspection of the original composite material according to the inspection items and methods specified in Table 3 before the test begins, and record the initial inspection results as the benchmark and reference for subsequent regular inspection data comparison.

[0147] The test items for composite material samples are shown in Table 3, mainly including appearance inspection, thermal conductivity, tensile strength, shear strength, flexural strength, etc. Appearance inspection can be carried out by taking photos, stereo microscope, scanning electron microscope, XRD composition analysis and other observation methods. Performance testing methods are based on the test standards of relevant specimen performance. Specific index requirements are shown in Table 3:

[0148] Table 3 Performance parameter requirements of composite material specimens

[0149]

[0150] Step 802: Perform aging treatment on the load material according to the single test spectrum in the comprehensive accelerated test spectrum.

[0151] In specific implementation, based on the sensitive environmental stresses and failure mechanisms of composite materials, and based on the analysis of environmental conditions throughout the product's life cycle, the primary aging damage factor during the warehouse storage phase is temperature, the primary aging damage factor during the outdoor testing phase is humidity and heat (without solar radiation in a simple warehouse), and the primary damage factors during the outdoor use phase are humidity and heat, temperature cycling, solar radiation, vibration, and impact. Research data indicates that salt spray has no significant special effect on the aging of single composite materials, and the aging process is still primarily a moisture absorption process, so the impact of salt spray on the aging of composite materials is not considered for the time being.

[0152] At the same time, there is a lack of data on acceleration factors or activation energies of composite materials under complex environmental stresses throughout their life cycle. Most of the current accelerated life tests are designed using empirical values ​​of activation energy (0.3eV to 1.0eV) measured in non-metallic material tests, and the accelerated environments are mostly wet-heat dual stress conditions, which are of little reference value for the selection of acceleration factors for composite materials in this test, and are not accurate when used directly to verify and estimate the service life or durability of composite products. Therefore, this test intends to select the wet-heat stress that is most sensitive to the aging of composite materials for alternating and multi-group aging test design, namely, three groups of wet-heat aging stress (outdoor test / use stage) and high temperature aging (storage stage), temperature cycle-vibration-impact (outdoor use stage) and other stresses are combined and cycled according to the product life profile for accelerated testing, and the comprehensive environmental damage (aging + stress) acceleration coefficient of the composite material is evaluated and corrected through analysis of the test results. Therefore, the spectrum of the comprehensive accelerated test of complex environmental effects of composite materials simulating the storage-use process is as follows Figure 2 As shown, a material activation energy of 0.7 eV is temporarily used for environmental stress acceleration.

[0153] Step 803: After the load material is aged according to the single test spectrum, a periodic test is performed to obtain the test results.

[0154] When implementing it specifically, Figure 2 As shown in Table 3, a regular test is performed after each cycle. After each single test spectrum is completed, a fixed number of samples are taken and tested according to the test items and methods specified in Table 3. The test results are recorded and compared with the initial test results to analyze the changing trends of the appearance and performance of the composite material samples.

[0155] Step 804: Integrate the initial detection result and the experimental detection result to obtain the detection result.

[0156] In specific implementation, the test is completed after 7 single test spectra are executed. The remaining samples are inspected for appearance and tested for performance according to the test items and methods specified in Table 3. The test results of the 7 tests are recorded. Then, the test results are compared with each other and with the initial test results. The change pattern of the appearance and performance of the composite material samples is analyzed to obtain the test results.

[0157] In some embodiments, as Figure 9 As shown, the environmental adaptability of the composite material is evaluated based on the test results to determine the target composite material that meets the adaptability requirements, including:

[0158] Step 901: Determine a relationship function between material properties and aging time of the composite material according to the test results.

[0159] When implementing it specifically, Figure 2As shown, the three groups of composite materials only change the humidity stress in the damp heat test conditions, and the combined temperature conditions and other test stress conditions remain unchanged. Therefore, the aging process of each cycle can be regarded as three groups of stress level constant stress accelerated life tests with humidity as the accelerated stress, that is, the test process in the embodiment of the present application is the aging process. The environmental adaptability evaluation is performed based on the test results of the comprehensive accelerated test of the complex environmental effects of composite materials simulating the storage-use history. During and after the test, if the composite material performance test results are within the specified range of the product design indicators, it is considered that the composite material product meets the design requirements for harsh and complex environmental adaptability (storage-service life) and can be used as the target composite material for actual use. The evaluation process is as follows:

[0160] 1) Determine the aging kinetic model of composite materials:

[0161] During the aging process of composite materials, the relationship between the aging characteristic index ε and the aging time t can be described by empirical formulas (8) to (10):

[0162] P=P0e -Vt (8)

[0163] P=P0+Vt (9)

[0164] P=P0+V log t (10)

[0165] Where: P is (1-ε), ε is the aging characteristic index when the aging time is t; t is the aging time, d (days); V is the performance change rate; P0 is a constant.

[0166] 2) Determine the temperature and humidity acceleration model:

[0167] According to formula (3), the Peck model can be expressed as a log-linear relationship,

[0168]

[0169] Where α0, α1, and α2 are constants; V is the rate constant of property change; RH is the relative humidity, indicating the humidity stress level; and T is the temperature, indicating the temperature stress level.

[0170] 3) Solve the performance change rate V at each stress level:

[0171] Taking formula (8) as an example, taking the natural logarithm of both sides yields ln P = ln P0 - Vt. Let X = t, Y = lnP, b = -V, a = lnP0, then Y = a + bX.

[0172] Using the least squares method to fit the linear equation Y=a+bX, we have

[0173] b=LXY / L XX (12)

[0174]

[0175]

[0176] in:

[0177]

[0178]

[0179]

[0180]

[0181]

[0182] n is the number of measurement points, r is the correlation coefficient, and the solution is a and b, which can then be used to solve for V.

[0183] Similarly, formulas (9) and (10) can also use the least squares method to perform linear fitting of characteristic parameters.

[0184] 4) Temperature and humidity acceleration model solution:

[0185] Formula (11) can be transformed into:

[0186]

[0187] According to formulas (12) to (14), the rate constant V of the (T, RH) performance change under different stress levels can be obtained. According to formula (15), the constants such as α0, α1, and α2 can be obtained by using the multivariate linear regression method to obtain the acceleration model.

[0188] 5) Correlation test:

[0189] Use the obtained correlation coefficient r to perform a correlation test, and look up the correlation coefficient table according to the interval with a confidence level of 90%. The degree of freedom f = n-2 is used to find r b value and compare it with the r value. If the absolute value of r is greater than or equal to r b , then the linear relationship between X and Y holds true, b is the negative value of the performance change rate constant V at the aging test temperature, if the absolute value of r is less than r b , then the linear relationship between X and Y does not hold, and other aging mathematical models should be replaced. For example, formula (9) or (10). The correlation coefficient critical value table is shown in Table 4:

[0190] Table 4 Correlation coefficient of composite materials

[0191]

[0192] Step 902: Determine the storage life of the composite material when the material fails according to the relationship function.

[0193] In specific implementation, the performance change rate V0 is calculated based on the temperature T0 and RH0 of the composite material during the aging process. The calculation formula is as follows:

[0194]

[0195] Then, if the critical value of the aging characteristic index of the material is ε s According to the material degradation curve, the storage life τ of the material can be extrapolated from formulas (8), (9), and (10), as shown in formulas (17), (18), and (19).

[0196] 1-ε s =P0e -Vt (8)

[0197] 1-ε s =P0+V t (18),

[0198] 1-ε s =P0+V log t (19).

[0199] Step 903: Evaluate the environmental adaptability of the composite material according to the storage life to determine a target composite material that meets the adaptability requirements.

[0200] During specific implementation, if the calculated storage life is greater than or equal to the preset life threshold, it can be determined that the corresponding target composite material meets the requirements for adaptability to harsh and complex environments (storage-service life). During the accelerated aging process, sufficient data is obtained through regular testing to obtain more accurate performance change patterns of composite materials, thereby improving the accuracy of the evaluation. By applying accelerated environmental stress that simulates sensitive environmental factors at various stages of the product life cycle, a survey and verification evaluation study is conducted on the performance stability and environmental adaptability of composite materials under long-term storage and duty in harsh, hot and humid environments, exposing the weak links in materials and processes of composite materials, obtaining complex environmental effects and damage patterns of composite materials, and evaluating the influence of activation energy parameters of composite materials on storage life under the combined action of complex environmental factors. Storage life data is provided as support for the evaluation of adaptability to complex natural environments of products equipped with composite materials, so as to determine target composite materials that meet adaptability requirements.

[0201] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied in a distributed scenario and performed by multiple devices working together. In such a distributed scenario, one of the multiple devices may only perform one or more steps of the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the method.

[0202] It should be noted that the above description is limited to some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in an order different from that described in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0203] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides a performance evaluation device for composite materials.

[0204] refer to Figure 10 , the performance evaluation device of the composite material comprises:

[0205] The parameter determination module 10 is configured to: determine the sensitive environmental factors and cumulative action time of the composite material at different working stages;

[0206] The stress determination module 20 is configured to: determine the environmental stress of the composite material at different working stages according to sensitive environmental factors;

[0207] The time determination module 30 is configured to: determine the duration of different environmental stresses according to the accumulated action time;

[0208] The experimental spectrum determination module 40 is configured to: determine a comprehensive accelerated test spectrum of the composite material according to the duration and the environmental stress;

[0209] The aging detection module 50 is configured to: perform aging treatment and regular detection on the composite material according to the comprehensive accelerated test spectrum to obtain detection results;

[0210] The material evaluation module 60 is configured to: perform environmental adaptability evaluation on the composite material according to the detection results to determine a target composite material that meets the adaptability requirements.

[0211] For the convenience of description, the above devices are described as being divided into various modules according to their functions. Of course, when implementing this application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0212] The device of the above embodiment is used to implement the corresponding composite material performance evaluation method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0213] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor, wherein when the processor executes the program, the performance evaluation method of the composite material described in any of the above embodiments is implemented.

[0214] Figure 11 10 is a schematic diagram showing a more specific hardware structure of an electronic device provided in this embodiment. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are communicatively connected to each other within the device via the bus 1050.

[0215] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0216] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 1020 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0217] The input / output interface 1030 is used to connect input / output modules to implement information input and output. The input / output modules can be configured as components within the device (not shown in the figure) or can be externally connected to the device to provide corresponding functions. Input devices may include a keyboard, mouse, touch screen, microphone, various sensors, etc., and output devices may include a display, speaker, vibrator, indicator light, etc.

[0218] The communication interface 1040 is used to connect to a communication module (not shown) to enable communication between the device and other devices. The communication module can communicate via a wired method (such as USB, network cable, etc.) or a wireless method (such as mobile network, WiFi, Bluetooth, etc.).

[0219] The bus 1050 comprises a path for transmitting information between the various components of the device (eg, the processor 1010 , the memory 1020 , the input / output interface 1030 , and the communication interface 1040 ).

[0220] It should be noted that although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040, and the bus 1050, in a specific implementation, the device may also include other components necessary for normal operation. In addition, it will be understood by those skilled in the art that the above device may only include the components necessary to implement the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0221] The electronic device of the above embodiment is used to implement the corresponding composite material performance evaluation method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0222] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the performance evaluation method of the composite material as described in any of the above embodiments.

[0223] The computer-readable media of this embodiment include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. 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, read-only 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.

[0224] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the composite material performance evaluation method described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0225] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0226] In addition, for simplicity of description and discussion, and in order not to make the embodiment of the application difficult to understand, the known power supply / ground connection with integrated circuit (IC) chip and other components may or may not be shown in the accompanying drawings provided. In addition, the device can be shown in the form of a block diagram to avoid making the embodiment of the application difficult to understand, and this also takes into account the following fact, that is, the details of the embodiment of these block diagram devices are highly dependent on the platform to be implemented in the embodiment of the application (that is, these details should be fully within the scope of understanding of those skilled in the art). When specific details (for example, circuit) are set forth to describe exemplary embodiments of the application, it will be apparent to those skilled in the art that the embodiment of the application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0227] Although the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those skilled in the art based on the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may utilize the embodiments discussed.

[0228] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A method for evaluating the performance of a composite material, characterized in that: include: Determining the sensitive environmental factors and cumulative action times of the composite material in different working stages; wherein the working stages include a storage stage, a test stage, and a use stage; the determining the sensitive environmental factors and cumulative action times of the composite material in different working stages includes: in response to the working stage being the storage stage, the sensitive environmental factors include temperature, and the cumulative action time is a first time; in response to the test stage being the test stage, the sensitive environmental factors include temperature and humidity, and the cumulative action time is a second time; wherein the first time is greater than the second time; in response to the working stage being the use stage, the sensitive environmental factors include temperature and humidity, humidity, temperature alternation, solar radiation, vibration, and shock, and the cumulative action time is a third time; wherein the first time is greater than the third time; determining the environmental stress of the composite material at different working stages according to the sensitive environmental factors; determining the duration of different environmental stresses according to the cumulative action time and the activation energy parameter of the composite material; determining a comprehensive accelerated test profile of the composite material based on the duration and the environmental stress; Performing aging treatment and regular testing on the composite material according to the comprehensive accelerated test spectrum to obtain test results; An environmental adaptability assessment is performed on the composite material according to the test results to determine a target composite material that meets the adaptability requirements.

2. The method according to claim 1, characterized in that Determining the environmental stress of the composite material at different working stages according to the sensitive environmental factors includes: In response to the working stage being the storage stage, determining high temperature stress according to the temperature of the storage stage; In response to the working phase being the test phase, determining a first hygrothermal stress according to the temperature and humidity in the test phase; In response to the working stage being the usage stage, the second hygrothermal stress is determined according to the temperature and humidity in the usage stage, the radiation intensity is determined according to the solar radiation in the usage stage, the vibration stress is determined according to the vibration in the usage stage, the temperature cycling stress is determined according to the temperature alternation in the usage stage, and the impact stress is determined according to the impact in the usage stage.

3. The method according to claim 2, characterized in that The determining the duration of different environmental stresses according to the cumulative action time and the activation energy parameter of the composite material comprises: Determining acceleration coefficients for different environmental stresses based on a preset acceleration model and activation energy parameters of the composite material; Determining the duration of different environmental stresses according to the cumulative action time and the acceleration coefficient; The acceleration coefficients of the moist heat stress are set to multiple groups, and the moist heat stress includes the first moist heat stress and the second moist heat stress.

4. The method according to claim 1, wherein Determining the comprehensive accelerated test spectrum of the composite material according to the duration and the environmental stress includes: Determining a single duration of different environmental stresses in a word cycle according to a preset number of cycles and the duration; A test spectrum coordinate system is constructed with the environmental stress as the vertical axis and time as the horizontal axis; sorting the single durations according to the order of the storage phase, the test phase, and the use phase to obtain a single test spectrum; The single test spectra are spliced ​​according to the number of cycles to obtain the comprehensive accelerated test spectrum.

5. The method according to claim 4, characterized in that The composite material is subjected to aging treatment and regular testing according to the comprehensive accelerated test spectrum to obtain test results, including: Before performing an aging treatment on the composite material, performing an initial test on the composite material to obtain an initial test result; Performing an aging treatment on the composite material according to the single test spectrum in the comprehensive accelerated test spectrum; After the composite material is aged according to the single test spectrum, a periodic test is performed to obtain a test result; The initial detection result and the experimental detection result are integrated to obtain the detection result.

6. The method according to claim 1, characterized in that The step of performing an environmental adaptability assessment on the composite material according to the test results to determine a target composite material that meets the adaptability requirements includes: Determining a relationship function between material properties and aging time of the composite material according to the test results; determining the storage life of the composite material when the material fails according to the relationship function; The environmental adaptability of the composite material is evaluated according to the storage life to determine the target composite material that meets the adaptability requirements.

7. A composite material performance evaluation device, characterized in that: include: The parameter determination module is configured to: determine the sensitive environmental factors and cumulative action time of the composite material in different working stages; wherein the working stages include a storage stage, a test stage, and a use stage; the determining the sensitive environmental factors and cumulative action time of the composite material in different working stages includes: in response to the working stage being the storage stage, the sensitive environmental factors include temperature, and the cumulative action time is a first time; in response to the test stage being the test stage, the sensitive environmental factors include temperature and humidity, and the cumulative action time is a second time; wherein the first time is greater than the second time; in response to the working stage being the use stage, the sensitive environmental factors include temperature and humidity, humidity, temperature alternation, solar radiation, vibration, and shock, and the cumulative action time is a third time; wherein the first time is greater than the third time; A stress determination module is configured to: determine the environmental stress of the composite material at different working stages according to the sensitive environmental factors; a time determination module, configured to: determine the duration of different environmental stresses according to the accumulated action time; an experimental spectrum determination module, configured to: determine a comprehensive accelerated test spectrum of the composite material according to the duration and the environmental stress; an aging detection module configured to: perform aging treatment and regular detection on the composite material according to the comprehensive accelerated test spectrum to obtain a detection result; The material evaluation module is configured to: perform environmental adaptability evaluation on the composite material according to the detection result to determine a target composite material that meets the adaptability requirements.

8. An electronic device comprising 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 method according to any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 6.

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