Cracking delay reliability evaluation method and device, computer device and storage medium

Abstract

The application relates to a delayed cracking reliability evaluation method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: fixing a sample plate on a fixing clamp based on at least two fixed through holes of the sample plate and at least two bolt holes of the fixing clamp, obtaining a plurality of samples, and determining prestresses on the sample plates of the plurality of samples; the sample is composed of the sample plate and the fixing clamp fixed together; the plurality of samples are continuously immersed in a corrosion medium for a preset time length, and the number of delayed cracking cracks on the sample plates of the plurality of samples is obtained; the prestresses on the sample plates of the plurality of samples and the number of delayed cracking cracks on the sample plates of the plurality of samples are used to establish a delayed cracking reliability evaluation graph through normal analysis; the delayed cracking reliability evaluation graph is used to represent the relationship between the prestress and the number of cracks; and the delayed cracking reliability of a to-be-evaluated plate is evaluated based on the delayed cracking reliability evaluation graph. The method can improve the delayed reliability evaluation efficiency.

Description

Technical Field

[0001] This application relates to the field of reliability testing technology, and in particular to a delayed cracking reliability assessment method, apparatus, computer equipment, storage medium, and computer program product. Background Technology

[0002] With the increasing demand for low-carbon and lightweight automobiles, the proportion of high-strength steel used in vehicles is gradually increasing. However, as the strength of high-strength steel continues to improve, especially above 1000 MPa, parts made from high-strength steel are prone to delayed cracking after a period of service due to environmental factors, posing significant safety hazards to the vehicle and passengers. The material selection requirements for parts have placed demands on the delayed cracking performance of high-strength steel. Currently, a systematic evaluation method for delayed cracking test results has not been established, resulting in low efficiency in delayed cracking reliability assessment. Summary of the Invention

[0003] Therefore, it is necessary to address the problem of low efficiency in delayed cracking reliability assessment by providing a delayed cracking reliability assessment method, apparatus, computer equipment, computer-readable storage medium, and computer program product that can improve the efficiency of delayed cracking reliability assessment.

[0004] Firstly, this application provides a method for assessing the reliability of delayed cracking. The method includes:

[0005] Based on at least two fixing holes of the template and at least two bolt holes of the fixing fixture, the template is fixed on the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined; the sample consists of a template and a fixing fixture fixed together.

[0006] Multiple samples were continuously immersed in a corrosive medium for a preset time to obtain the number of delayed cracks on each sample plate.

[0007] Based on the prestress on each sample and the number of delayed-initiation cracks on each sample, a delayed-initiation reliability assessment chart is established through normal analysis; the delayed-initiation reliability assessment chart is used to characterize the relationship between prestress and the number of cracks.

[0008] Based on the delayed cracking reliability assessment chart, the delayed cracking reliability of the board to be evaluated is assessed.

[0009] In one embodiment, based on at least two fixing through holes of the template and at least two bolt holes of the fixing fixture, the template is fixed to the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined, including:

[0010] For each pair of at least two fixed through holes, the first fixed through hole is fixed to the first bolt hole, the second fixed through hole is fixed to the second bolt hole, and the template is fixed on the fixing fixture to obtain the current sample; the first bolt hole and the second bolt hole do not coincide; the first distance between the positions of the first fixed through hole and the second fixed through hole on the current sample is less than the second distance between the positions of the first fixed through hole and the second fixed through hole on the template;

[0011] Obtain the deflection and thickness of the current sample corresponding to the current template;

[0012] Based on the deflection, thickness, and the first distance corresponding to the current sample, determine the prestress on the current template corresponding to the current sample.

[0013] In one embodiment, based on the prestress on each sample plate in multiple samples and the number of delayed-initiation cracks on each sample plate, a delayed-initiation reliability assessment chart is established through normal analysis, including:

[0014] For the current prestress on the template corresponding to the current sample, determine the mean and standard deviation of the number of cracks corresponding to the current prestress;

[0015] Based on the mean and standard deviation, determine the confidence interval for the number of cracks corresponding to the current prestress; the confidence interval for the number of cracks includes a first boundary value and a second boundary value, and the first boundary value is less than the second boundary value;

[0016] A first curve is determined based on the first boundary value corresponding to each prestress; a second curve is determined based on the second boundary value corresponding to each prestress.

[0017] Based on the first and second curves, a reliability assessment chart for delayed cracking is determined.

[0018] In one embodiment, a delayed cracking reliability assessment is performed on the board to be assessed based on a delayed cracking reliability assessment map, including:

[0019] Based on at least two target through holes in the plate to be evaluated and at least two bolt holes in the fixing fixture, the plate to be evaluated is fixed on the fixing fixture to obtain the sample to be evaluated, and the target prestress on the plate to be evaluated in the sample to be evaluated is determined; the position of the target through holes on the plate to be evaluated is the same as the position of the fixing through holes on the sample, and the number of target through holes is the same as the number of fixing through holes; the plate to be evaluated consists of the plate to be evaluated and the fixing fixture fixed together.

[0020] By controlling the sample to be evaluated to be continuously immersed in the corrosive medium for a preset time, the number of target cracks with delayed cracking on the plate to be evaluated in the sample to be evaluated is obtained.

[0021] Based on the target prestress, the target number of cracks, and the delayed cracking reliability assessment diagram, a delayed cracking reliability assessment is performed on the plate to be assessed.

[0022] In one embodiment, the delayed cracking reliability assessment map includes a critical reliability zone, a safe reliability zone, and a risky reliability zone; based on the target prestress, the target number of cracks, and the delayed cracking reliability assessment map, a delayed cracking reliability assessment is performed on the plate to be assessed, including:

[0023] For each prestress, determine the first set of points where the number of cracks is less than the first boundary value corresponding to the current prestress, and the second set of points where the number of cracks is greater than the second boundary value corresponding to the current prestress.

[0024] The region consisting of the first set of points corresponding to each prestress is defined as the reliability safety zone;

[0025] The region consisting of the second point set corresponding to each prestress is defined as the reliability risk zone;

[0026] The region formed by the points between the first curve and the second curve is defined as the critical reliability region.

[0027] Based on the target prestress, the target number of cracks, the critical reliability zone, the safe reliability zone, and the risk reliability zone, a delayed cracking reliability assessment is conducted on the plate to be evaluated.

[0028] In one embodiment, a delayed cracking reliability assessment is performed on the plate to be evaluated based on the target prestress, the target number of cracks, the reliability critical zone, the reliability safe zone, and the reliability risk zone, including:

[0029] Determine the target number of cracks and the target location of the target prestress in the delayed cracking reliability assessment chart;

[0030] When the target location is within the reliability safety zone, the delayed cracking reliability of the board to be evaluated is determined to be better than that of the sample board.

[0031] When the target location is in the reliability critical zone, the delayed cracking reliability of the board to be evaluated is determined to be equal to that of the sample board;

[0032] When the target location is in a reliability risk zone, the delayed cracking reliability of the board to be evaluated is determined to be inferior to that of the sample.

[0033] Secondly, this application also provides a delayed cracking reliability assessment device. The device includes:

[0034] A determination module is used to fix the template to the fixing fixture based on at least two fixing through holes of the template and at least two bolt holes of the fixing fixture, to obtain multiple samples, and to determine the prestress on the template of each of the multiple samples; the sample consists of the template and the fixing fixture fixed together;

[0035] The control module is used to control the continuous immersion of multiple samples in a corrosive medium for a preset time, and to obtain the number of delayed cracks on the sample plates of each sample.

[0036] A module is established to create a delayed cracking reliability assessment map based on the prestress and the number of delayed cracks on each sample in multiple samples, using normal analysis. The delayed cracking reliability assessment map is used to characterize the relationship between prestress and the number of cracks.

[0037] The evaluation module is used to perform delayed cracking reliability evaluation on the board to be evaluated based on the delayed cracking reliability evaluation chart.

[0038] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0039] Based on at least two fixing holes of the template and at least two bolt holes of the fixing fixture, the template is fixed on the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined; the sample consists of a template and a fixing fixture fixed together.

[0040] Multiple samples were continuously immersed in a corrosive medium for a preset time to obtain the number of delayed cracks on each sample plate.

[0041] Based on the prestress on each sample and the number of delayed-initiation cracks on each sample, a delayed-initiation reliability assessment chart is established through normal analysis; the delayed-initiation reliability assessment chart is used to characterize the relationship between prestress and the number of cracks.

[0042] Based on the delayed cracking reliability assessment chart, the delayed cracking reliability of the board to be evaluated is assessed.

[0043] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0044] Based on at least two fixing holes of the template and at least two bolt holes of the fixing fixture, the template is fixed on the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined; the sample consists of a template and a fixing fixture fixed together.

[0045] Multiple samples were continuously immersed in a corrosive medium for a preset time to obtain the number of delayed cracks on each sample plate.

[0046] Based on the prestress on each sample and the number of delayed-initiation cracks on each sample, a delayed-initiation reliability assessment chart is established through normal analysis; the delayed-initiation reliability assessment chart is used to characterize the relationship between prestress and the number of cracks.

[0047] Based on the delayed cracking reliability assessment chart, the delayed cracking reliability of the board to be evaluated is assessed.

[0048] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0049] Based on at least two fixing holes of the template and at least two bolt holes of the fixing fixture, the template is fixed on the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined; the sample consists of a template and a fixing fixture fixed together.

[0050] Multiple samples were continuously immersed in a corrosive medium for a preset time to obtain the number of delayed cracks on each sample plate.

[0051] Based on the prestress on each sample and the number of delayed-initiation cracks on each sample, a delayed-initiation reliability assessment chart is established through normal analysis; the delayed-initiation reliability assessment chart is used to characterize the relationship between prestress and the number of cracks.

[0052] Based on the delayed cracking reliability assessment chart, the delayed cracking reliability of the board to be evaluated is assessed.

[0053] The aforementioned delayed cracking reliability assessment method, apparatus, computer equipment, storage medium, and computer program product fix the template to a fixing fixture through at least two fixing through holes and at least two bolt holes of the fixing fixture, obtaining multiple samples. The prestress on each of the multiple samples is determined, and the samples are continuously immersed in a corrosive medium for a preset time to obtain the number of delayed cracks on each sample. Based on the prestress and the number of delayed cracks on each sample, a delayed cracking reliability assessment map is established through normal analysis. This method of establishing a delayed cracking reliability assessment map based on the number of delayed cracks in multiple samples in a corrosive medium accelerates the delayed cracking rate of the samples, improving the efficiency of obtaining the delayed cracking reliability assessment map and thus improving the efficiency of delayed cracking reliability assessment of the plate under evaluation. Furthermore, assessing the delayed cracking reliability of the plate under evaluation based on the established delayed cracking reliability assessment map further improves the efficiency of delayed cracking reliability assessment. Attached Figure Description

[0054] Figure 1 This is a diagram illustrating the application environment of the delayed cracking reliability assessment method in one embodiment;

[0055] Figure 2 This is a flowchart illustrating a delayed cracking reliability assessment method in one embodiment;

[0056] Figure 3 This is a schematic diagram of a sub-process of S202 in one embodiment;

[0057] Figure 4 This is a schematic diagram of a fixing clamp in one embodiment;

[0058] Figure 5 This is a schematic diagram of a template in one embodiment;

[0059] Figure 6 This is a schematic diagram of a sample in one embodiment;

[0060] Figure 7 This is a schematic diagram of the deflection, thickness, and first distance of the current sample in one embodiment;

[0061] Figure 8 This is a schematic diagram of a sub-process of S206 in one embodiment;

[0062] Figure 9 This is a schematic diagram of a sub-process of S208 in one embodiment;

[0063] Figure 10 This is a schematic diagram of a sub-process of S906 in one embodiment;

[0064] Figure 11This is a reliability assessment diagram for delayed cracking in one embodiment;

[0065] Figure 12 This is a schematic diagram of multiple samples being immersed in a corrosive medium in one embodiment;

[0066] Figure 13 This is a histogram of the normal distribution of the number of cracks under a preset prestress in one embodiment.

[0067] Figure 14 This is a structural block diagram of a delayed cracking reliability assessment device in one embodiment;

[0068] Figure 15 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0070] The delayed cracking reliability assessment method provided in this application can be applied to, for example, Figure 1In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104, or it can be located in the cloud or on another network server. The training method for the text detection model provided in this application embodiment can be executed by either terminal 102 or server 104 alone, or by terminal 102 and server 104 in collaboration. Taking execution by terminal 102 alone as an example: Based on at least two fixing holes of the template and at least two bolt holes of the fixing fixture, the template is fixed on the fixing fixture to obtain multiple samples, and the prestress on each template of the multiple samples is determined; the sample consists of a template and a fixing fixture fixed together; the multiple samples are continuously immersed in the corrosive medium for a preset time to obtain the number of delayed cracks on each template of the multiple samples; based on the prestress on each template of the multiple samples and the number of delayed cracks on each template, a delayed cracking reliability assessment map is established through normal analysis; the delayed cracking reliability assessment map is used to characterize the relationship between prestress and the number of cracks; based on the delayed cracking reliability assessment map, the delayed cracking reliability assessment of the plate to be assessed is performed. The terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, and smart in-vehicle systems. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted devices. The server 104 can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0071] In one embodiment, such as Figure 2 As shown, a delayed cracking reliability assessment method is provided, which can be applied to computer equipment (the computer equipment can be...) Figure 1 Taking terminal 102 or server 104 as an example, the following steps are included:

[0072] S202, based on at least two fixing holes of the template and at least two bolt holes of the fixing fixture, the template is fixed on the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined; the sample consists of the template and the fixing fixture fixed together.

[0073] The template is made of metal; for example, the sample can be a steel plate. The fixing fixture is made of non-metallic material. The template includes at least two fixing holes, and the fixing fixture includes at least two bolt holes. Each pair of fixing holes can be fixed together with two bolt holes to form a sample. The sample consists of the template and fixing fixture fixed together. The shape of the template includes, but is not limited to, a long strip, a circle, or an ellipse. In some embodiments, the long strip template includes multiple fixing holes, and the fixing fixture includes multiple bolt holes. Each pair of fixing holes can be fixed together with two bolt holes to form a sample assembly. A sample assembly includes multiple sets of templates and fixing fixtures fixed together. In some embodiments, the computer device controls the bolts to fix the template to the fixing fixture based on the at least two fixing holes of the template and the at least two bolt holes of the fixing fixture, thereby obtaining multiple samples.

[0074] Stress refers to the internal force generated between different parts of an object when it deforms due to external factors (force, humidity, temperature field changes, etc.). The internal force per unit area is called stress. Prestress refers to the stress on the individual templates of multiple samples.

[0075] S204 controls the continuous immersion of multiple samples in a corrosive medium for a preset time to obtain the number of delayed cracks on each sample's template.

[0076] The corrosive medium refers to a medium capable of corroding the sample. Optionally, the corrosive medium includes brine, hydrochloric acid, or sulfuric acid. For example, a 5% brine solution can be used as the corrosive medium. The sample is continuously immersed in the corrosive medium for a preset time, and the corrosive medium corrodes the sample, thereby inducing delayed-onset cracks on the sample. A computer device controls multiple samples to be continuously immersed in the corrosive medium for a preset time, obtaining the number of delayed-onset cracks on each sample's sample. For example, the computer device can acquire metallographic images of each sample's sample using a metallographic microscope or a scanning electron microscope, and analyze each metallographic image to obtain the number of delayed-onset cracks on each sample's sample. The number of delayed-onset cracks reflects the sample's delayed-onset crack reliability. Under the same prestress, a higher number of delayed-onset cracks indicates lower delayed-onset crack reliability of the sample.

[0077] In some embodiments, the template further includes at least one punched hole. The punched hole on the template helps to accelerate the corrosive effect of the corrosive medium on the template, which helps to improve the efficiency of delayed cracking reliability testing, and thus improves the efficiency of delayed cracking reliability assessment.

[0078] S206. Based on the prestress on each sample and the number of delayed cracks on each sample, a delayed cracking reliability assessment chart is established through normal analysis. The delayed cracking reliability assessment chart is used to characterize the relationship between prestress and the number of cracks.

[0079] Normality analysis refers to the method of analyzing data that follows a normal distribution. In some embodiments, for each prestress, the number of samples is M, resulting in M ​​groups of delayed-opening crack counts. A computer performs a P-test on the number of delayed-opening cracks under each prestress, obtaining the P-value for each prestress. If the P-value is greater than a preset test value, the number of delayed-opening cracks under that prestress is considered to conform to a normal distribution. The P-test calculates the probability that the statistic will take its realized value or a more extreme value under the null hypothesis, and then compares the P-value with the significance level. If the P-value is less than the given significance level, the null hypothesis is rejected; otherwise, it is accepted. Besides using the rejection region and acceptance region to determine whether to reject the null hypothesis, the adjoint probability can also be used. The adjoint probability is the probability that the test statistic will take the observed value or a more extreme value when the null hypothesis is true; this probability value is called the P-value. Each test statistic corresponds to a P-value. The P-value measures the degree of deviation between the sample observed data and the assumed value in the null hypothesis. The smaller the p-value, the greater the inconsistency between the observed data and H0, and the more significant the test result. Commonly used statistical software for p-tests include Eviews (Econometrics Views), SPSS (Solutions Statistical Package for the Social Sciences), or Minitab (Minitab Statistical Software), all of which provide the p-value corresponding to the test statistic in their analysis results.

[0080] For the prestress and crack number that conform to a normal distribution, the computer equipment obtains the mean and standard deviation of the crack number. Based on the mean and standard deviation, the normal distribution analysis method is used to establish a delayed cracking reliability assessment chart. The delayed cracking reliability assessment chart is used to characterize the relationship between prestress and crack number.

[0081] S208, based on the delayed cracking reliability assessment chart, performs delayed cracking reliability assessment on the board to be evaluated.

[0082] In this process, computer equipment controls the plate under evaluation to conduct a delayed cracking reliability test, obtaining the prestress and the number of cracks in the plate. Since the delayed cracking reliability assessment chart is used to characterize the relationship between prestress and the number of cracks, the delayed cracking reliability of the plate under evaluation can be rapidly assessed based on its prestress and the number of cracks.

[0083] In the aforementioned delayed cracking reliability assessment method, the template is fixed to the fixing fixture using at least two fixing through holes and at least two bolt holes of the fixing fixture, resulting in multiple samples. The prestress on each of the multiple samples is determined, and the samples are continuously immersed in the corrosive medium for a preset time to obtain the number of delayed cracks on each of the multiple samples. Based on the prestress and the number of delayed cracks on each of the multiple samples, a delayed cracking reliability assessment map is established through normal analysis. This method of establishing a delayed cracking reliability assessment map based on the number of delayed cracks in multiple samples in the corrosive medium accelerates the delayed cracking rate of the samples, improving the efficiency of obtaining the delayed cracking reliability assessment map and thus improving the efficiency of delayed cracking reliability assessment of the plate to be assessed. Furthermore, assessing the delayed cracking reliability of the plate to be assessed based on the established delayed cracking reliability assessment map further improves the efficiency of delayed cracking reliability assessment of the plate to be assessed.

[0084] In one embodiment, such as Figure 3 As shown, based on at least two fixing holes of the template and at least two bolt holes of the fixing fixture, the template is fixed on the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined, including:

[0085] S302, for each pair of at least two fixed through holes, fix the first fixed through hole to the first bolt hole, fix the second fixed through hole to the second bolt hole, and fix the template on the fixing fixture to obtain the current sample; the first bolt hole and the second bolt hole do not coincide; the first distance between the positions of the first fixed through hole and the second fixed through hole on the current sample is less than the second distance between the positions of the first fixed through hole and the second fixed through hole on the template.

[0086] In this process, the computer equipment fixes the first fixing through-hole to the first bolt hole and the second fixing through-hole to the second bolt hole for each pair of at least two fixing through-holes, thus fixing the template onto the fixing fixture to obtain the current sample. The first bolt hole and the second bolt hole do not coincide; the first distance between the positions of the first fixing through-hole and the second fixing through-hole on the current sample is less than the second distance between the positions of the first fixing through-hole and the second fixing through-hole on the template. For templates with the same distribution of fixing through-hole positions, the smaller the first distance, the greater the degree of bending of the template in the sample. Figure 4The diagram shows a fixing clamp and its bolt holes. The fixing clamp is a long, narrow clamp with multiple bolt holes. Figure 5 The diagram shows a template, its fixing through holes, and its punched holes. In the diagram, the template is a long strip; white holes represent punched holes, and gray holes represent fixing through holes. Figure 6 The diagram shows a schematic of the sample. In the diagram, each pair of fixing holes is fixed to two bolt holes, resulting in multiple sets of sub-samples composed of templates and fixing fixtures. These sub-samples are then combined to form a large sample. This method of combining multiple sub-samples into a large sample allows for the simultaneous execution of multiple sets of delayed cracking reliability tests, which improves the efficiency of delayed cracking reliability testing and thus enhances the efficiency of delayed cracking reliability assessment.

[0087] S304, obtain the deflection and thickness of the current sample corresponding to the current template.

[0088] Here, deflection refers to the linear displacement of the template axis on the sample in the direction perpendicular to the axis under prestress. Thickness refers to the thickness of the template in the sample. The computer equipment obtains the deflection and thickness of the current template corresponding to each of multiple samples.

[0089] S306, determine the prestress on the current template corresponding to the current sample based on the deflection, thickness and the first distance corresponding to the current sample.

[0090] The computer equipment inputs the deflection, thickness, and the first distance corresponding to the current sample into the prestress calculation formula to obtain the prestress on the current template corresponding to the current sample, and then obtains the prestress on the template of each of the multiple samples. For example... Figure 7 The diagram shows the deflection, thickness, and first distance corresponding to the current sample on the current template. Here, y represents the deflection (in meters), t represents the thickness (in meters), and H represents the first distance corresponding to the current sample (in meters). The prestress calculation formula is: f = kEty / H 2 In the formula, k represents the stress coefficient, which can be a fixed value; E represents the elastic modulus, which can be in Pascals (Pa); and f represents the prestress, which can be in Pascals.

[0091] In this embodiment, by fixing the first fixing through hole to the first bolt hole and the second fixing through hole to the second bolt hole in every two fixing through holes, the template is fixed on the fixing fixture to obtain the current sample. Based on the deflection and thickness of the template in each sample and the first distance, the prestress on the template corresponding to each sample can be determined. Based on the prestress corresponding to each sample, it is beneficial to improve the efficiency of obtaining the delayed cracking reliability assessment diagram, thereby improving the efficiency of delayed cracking reliability assessment.

[0092] In one embodiment, such as Figure 8 As shown, based on the prestress on each sample plate and the number of delayed-initiation cracks on each sample plate, a delayed-initiation reliability assessment diagram is established through normal analysis, including:

[0093] S802, for the current prestress on the template corresponding to the current sample, determine the mean and standard deviation of the number of cracks corresponding to the current prestress.

[0094] Multiple sets of delayed cracking reliability tests were conducted using the same template and fixing fixtures to obtain the number of cracks under various prestressing conditions. For the current prestress, the number of cracks corresponding to that prestress was determined. Computer equipment was used to determine the mean and standard deviation of the number of cracks corresponding to the current prestress.

[0095] S804. Based on the mean and standard deviation, determine the confidence interval for the number of cracks corresponding to the current prestress; the confidence interval for the number of cracks includes a first boundary value and a second boundary value, and the first boundary value is less than the second boundary value.

[0096] The computer equipment determines the confidence interval for the number of cracks corresponding to the current prestress based on the mean and standard deviation. In some embodiments, the 3σ principle can be used to determine the confidence interval for the number of cracks. Let μ represent the mean and σ represent the standard deviation, and (μ-3σ, μ+3σ) be used as the confidence interval for the number of cracks. The probability that the number of cracks falls within (μ-3σ, μ+3σ) is 0.9973. The confidence interval for the number of cracks includes a first boundary value and a second boundary value, where the first boundary value is less than the second boundary value. The first boundary value is μ-3σ, and the second boundary value is μ+3σ.

[0097] S806, based on the first boundary value corresponding to each prestress, determine the first curve; based on the second boundary value corresponding to each prestress, determine the second curve.

[0098] Specifically, the computer equipment determines a first curve based on the first boundary value corresponding to each prestress. Specifically, the computer equipment fits the points determined by each prestress and its corresponding first boundary value to the first curve. It then fits the points determined by the second boundary value corresponding to each prestress to the second curve.

[0099] S808, based on the first curve and the second curve, determines the delayed cracking reliability assessment diagram.

[0100] The computer equipment determines the delayed cracking reliability assessment map based on the first curve and the second curve. The delayed cracking reliability assessment map includes the first curve and the second curve, and is used to characterize the relationship between prestress and the number of cracks.

[0101] In this embodiment, the confidence interval for the number of cracks corresponding to the current prestress is determined based on the mean and standard deviation of the number of cracks corresponding to the current prestress. Based on the first and second boundary values ​​corresponding to each prestress, a first curve and a second curve are determined respectively, thereby obtaining a delayed cracking reliability assessment diagram determined by the first and second curves. This delayed cracking reliability assessment diagram, determined by multiple prestresses and their corresponding crack numbers, has high accuracy, which helps improve the accuracy and efficiency of delayed cracking reliability assessment.

[0102] In one embodiment, such as Figure 9 As shown, based on the delayed cracking reliability assessment chart, a delayed cracking reliability assessment is performed on the board to be evaluated, including:

[0103] S902, based on at least two target through holes of the plate to be evaluated and at least two bolt holes of the fixing fixture, the plate to be evaluated is fixed on the fixing fixture to obtain the sample to be evaluated, and the target prestress on the plate to be evaluated in the sample to be evaluated is determined; the position of the target through holes on the plate to be evaluated is the same as the position of the fixing through holes on the sample, and the number of target through holes is the same as the number of fixing through holes; the plate to be evaluated consists of the plate to be evaluated and the fixing fixture fixed together.

[0104] In this process, a delayed cracking reliability test is conducted on the plate to be evaluated to obtain the number of delayed cracks in the plate under prestress, thereby assessing the delayed cracking reliability of the plate. The plate to be evaluated and the template have the same strength but different steel grades. The plate to be evaluated includes at least two target through holes, the positions of which on the plate are the same as the positions of the fixed through holes on the template, and the number of target through holes is the same as the number of fixed through holes. In some embodiments, the template includes punched holes, and the positions and number of punched holes in the plate to be evaluated are consistent with the positions and number of punched holes in the template.

[0105] Based on at least two target through holes in the plate to be evaluated and at least two bolt holes in the fixing fixture, the plate to be evaluated is fixed onto the fixing fixture to obtain the sample to be evaluated. The plate to be evaluated consists of the plate to be evaluated and the fixing fixture fixed together. The target prestress is the stress on the plate to be evaluated in the sample to be evaluated. Computer equipment determines the target prestress on the plate to be evaluated in the sample to be evaluated.

[0106] S904 controls the sample to be evaluated to be continuously immersed in the corrosive medium for a preset time to obtain the target number of delayed cracks on the plate to be evaluated in the sample.

[0107] In this process, computer equipment controls the continuous immersion of the sample to be evaluated in a corrosive medium for a preset time, thereby obtaining the target number of delayed-onset cracks on the sample's evaluation plate. Using the same corrosive medium and the same preset immersion time as the sample, the evaluation plate in the sample is corroded in the corrosive medium, resulting in cracks.

[0108] S906, based on the target prestress, the target number of cracks, and the delayed cracking reliability assessment diagram, perform a delayed cracking reliability assessment on the plate to be assessed.

[0109] The computer equipment determines the location of the points corresponding to the target prestress and the number of target cracks on the delayed cracking reliability assessment map, thereby performing a delayed cracking reliability assessment on the plate to be assessed. The delayed cracking reliability assessment primarily evaluates the delayed cracking reliability of the plate to be assessed relative to the sample plate.

[0110] In this embodiment, the plate to be evaluated is fixed to the fixture through the target through-hole and the bolt holes of the fixture, thus obtaining the sample to be evaluated and the target prestress. The sample to be evaluated is continuously immersed in the corrosive medium for a preset time, thereby performing a delayed cracking reliability assessment on the plate to be evaluated based on the target prestress, the target number of cracks, and the delayed cracking reliability assessment chart. This delayed cracking reliability experiment on the plate to be evaluated, thereby obtaining the target prestress and the target number of cracks, allows for a rapid assessment of the delayed cracking reliability of the plate to be evaluated based on the determined delayed cracking reliability assessment chart.

[0111] In one embodiment, such as Figure 10 As shown, the delayed cracking reliability assessment diagram includes a critical reliability zone, a safe reliability zone, and a risky reliability zone. Based on the target prestress, the target number of cracks, and the delayed cracking reliability assessment diagram, a delayed cracking reliability assessment is performed on the plate to be assessed, including:

[0112] S1002, for each prestress, determine the first set of points where the number of cracks is less than the first boundary value corresponding to the current prestress, and the second set of points where the number of cracks is greater than the second boundary value corresponding to the current prestress.

[0113] Specifically, for each prestress, the computer equipment determines a first set of points where the number of cracks is less than the first boundary value corresponding to the current prestress, and a second set of points where the number of cracks is greater than the second boundary value corresponding to the current prestress.

[0114] S1004 defines the region consisting of the first set of points corresponding to each prestress as the reliability safety zone; and defines the region consisting of the second set of points corresponding to each prestress as the reliability risk zone.

[0115] The computer equipment defines the region consisting of the first set of points corresponding to each prestress as the reliability safety zone, and the region consisting of the second set of points corresponding to each prestress as the reliability risk zone.

[0116] S1006, the region formed by the points between the first curve and the second curve is defined as the reliability critical region.

[0117] The computer equipment defines the region formed by the points between the first curve and the second curve as the reliability critical zone.

[0118] S1008, based on the target prestress, the target number of cracks, the critical reliability zone, the safe reliability zone, and the risk reliability zone, performs a delayed cracking reliability assessment on the plate to be evaluated.

[0119] The computer equipment determines whether the points corresponding to the target prestress and the number of target cracks are in the reliability critical zone, the reliability safe zone, or the reliability risk zone, thereby performing a delayed cracking reliability assessment on the plate to be evaluated. For example... Figure 11 The diagram shows the critical reliability zone, safe reliability zone, and risk reliability zone in a delayed cracking reliability assessment. The X-axis represents the number of cracks, and the Y-axis represents the prestress.

[0120] In this embodiment, by determining a first set of points where the number of cracks is less than the first boundary value corresponding to the current prestress, and a second set of points where the number of cracks is greater than the second boundary value corresponding to the current prestress, a reliability safety zone and a reliability risk zone are determined. The region formed by the points between the first curve and the second curve is defined as the reliability critical zone. Then, based on the target prestress, the target number of cracks, the reliability critical zone, the reliability safety zone, and the reliability risk zone, a delayed cracking reliability assessment is performed on the plate to be evaluated. Each reliability partition in the delayed cracking reliability assessment diagram can assess the delayed cracking reliability of the plate to be evaluated. Using an accurate delayed cracking reliability assessment diagram and precise reliability partitions to perform a delayed cracking reliability assessment on the plate to be evaluated improves the efficiency of the delayed cracking reliability assessment.

[0121] In one embodiment, a delayed cracking reliability assessment is performed on the plate to be evaluated based on the target prestress, the target number of cracks, the reliability critical zone, the reliability safe zone, and the reliability risk zone. This includes: determining the target positions of the target number of cracks and the target prestress in the delayed cracking reliability assessment diagram; determining that the delayed cracking reliability of the plate to be evaluated is better than that of the sample plate when the target position is in the reliability safe zone; determining that the delayed cracking reliability of the plate to be evaluated is equal to that of the sample plate when the target position is in the reliability critical zone; and determining that the delayed cracking reliability of the plate to be evaluated is worse than that of the sample plate when the target position is in the reliability risk zone.

[0122] The computer equipment determines the target crack number and target prestress location on the delayed cracking reliability assessment map, and then judges the delayed cracking reliability of the plate to be evaluated based on the target location. If the target location is within the reliability safe zone, the delayed cracking reliability of the plate to be evaluated is determined to be better than that of the sample plate; if the target location is within the reliability critical zone, the delayed cracking reliability of the plate to be evaluated is determined to be equal to that of the sample plate; if the target location is within the reliability risk zone, the delayed cracking reliability of the plate to be evaluated is determined to be worse than that of the sample plate.

[0123] In this embodiment, the delayed cracking reliability of the plate to be evaluated is determined by the target number of cracks and the target position of the target prestress in the delayed cracking reliability assessment map. The delayed cracking reliability assessment map and each reliability zone are obtained in the delayed cracking reliability test of the sample. Based on the determined delayed cracking reliability assessment map and each reliability zone, the delayed cracking reliability assessment of the plate to be evaluated is carried out, which is conducive to improving the efficiency of the delayed cracking reliability assessment of the plate to be evaluated.

[0124] To illustrate the delayed cracking reliability assessment method and its effectiveness in this scheme in detail, a specific embodiment is described below:

[0125] The template can be a long strip, made of high-strength steel plate with a strength of 1000MPa or higher. The fixing fixture is made of non-metallic material. The corrosive medium is a 5% salt solution. A hole with a diameter of D is punched at the center axis of the template. The number of punched holes is guaranteed to be the same under the same conditions.

[0126] Based on at least two fixing holes in the template and at least two bolt holes in the fixing fixture, the template is fixed to the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined. The sample consists of a template and a fixing fixture fixed together. Specifically, for each pair of fixing holes in the at least two fixing holes, the first fixing hole is fixed to the first bolt hole, and the second fixing hole is fixed to the second bolt hole. The template is then fixed to the fixing fixture to obtain the current sample; the first bolt hole and the second bolt hole do not coincide; the first distance between the positions of the first fixing hole and the second fixing hole on the current sample is less than the second distance between the positions of the first fixing hole and the second fixing hole on the template. The deflection and thickness of the current template corresponding to the current sample are obtained. Based on the deflection, thickness, and the first distance corresponding to the current sample, the prestress on the current template corresponding to the current sample is determined. Multiple delayed cracking reliability samples under various prestresses can be produced at once. At least 30 samples are required for each prestress. A certain number of samples are sufficient for normal distribution analysis. Non-metallic bolts and non-metallic nuts are used to fix the samples.

[0127] Multiple samples are continuously immersed in a corrosive medium for a preset time to obtain the number of delayed-initiation cracks on each sample's specimen. For example... Figure 12 The diagram shows multiple samples immersed in a corrosive medium. The preset duration is 300 hours.

[0128] Based on the prestress and the number of delayed-initiation cracks on each sample's template, a delayed-initiation reliability assessment chart is established using normal analysis. This chart characterizes the relationship between prestress and the number of cracks. Specifically, for the current prestress on the template corresponding to the current sample, the mean and standard deviation of the number of cracks corresponding to the current prestress are determined. Based on the mean and standard deviation, a confidence interval for the number of cracks corresponding to the current prestress is determined. The confidence interval includes a first boundary value and a second boundary value, with the first boundary value being less than the second boundary value. A first curve is determined based on the first boundary value corresponding to each prestress; a second curve is determined based on the second boundary value corresponding to each prestress; and the delayed-initiation reliability assessment chart is determined based on the first and second curves. For example, under a preset prestress, the number of samples is 50, and the number of delayed-opening cracks on each of the 50 samples are as follows: 12, 10, 13, 15, 14, 18, 16, 15, 16, 18, 15, 13, 13, 18, 15, 19, 15, 16, 14, 19, 19, 19, 15, 13, 14, 9, 15, 12, 16, 14, 18, 17, 20, 11, 12, 13, 14, 5, 6, 14, 12, 13, 18, 20, 17, 14, 15, 16, 18, 10. Figure 13 The figure shows the normal distribution histogram of the number of delayed-opening cracks under the preset prestress. Using Minitab software, normal distribution analysis was performed, yielding a P-value of 0.091. Since the P-value is greater than the preset value of 0.05, the number of delayed-opening cracks under the preset prestress meets the requirements of a normal distribution. The mean μ and standard deviation σ of the number of delayed-opening cracks under the preset prestress were calculated, yielding a mean μ of 14.66 and a standard deviation σ of 3.274. According to the 3σ principle, the probability that the number of delayed-opening cracks under the preset prestress falls within (μ-3σ, μ+3σ) is 0.9973. Therefore, the confidence interval for the number of cracks is (μ-3σ, μ+3σ) = (4.838, 24.482). Using the same method, the mean, variance, and confidence interval for the number of cracks under each prestress were obtained. The mean μ1 and crack number confidence interval (a1, b1) under prestress f1, the mean μ2 and crack number confidence interval (a2, b2) under prestress f2, and so on, are obtained sequentially until the mean μn and crack number confidence interval (an, bn) under prestress fn are obtained. Simultaneously, the normal distribution curve for each prestress is plotted. (Reference) Figure 11The delayed cracking reliability assessment graph is used to fit the points corresponding to μ1, μ2, and μn into a trend curve, the points corresponding to a1, a2, and an into a first curve, and the points corresponding to b1, b2, and bn into a second curve. Figure 11 In the diagram, the trend curve is a solid line, the first curve is a dashed line close to the reliability safety zone, and the second curve is a dashed line close to the reliability risk zone.

[0129] Based on the delayed cracking reliability assessment diagram, a delayed cracking reliability assessment is performed on the plate to be assessed. Specifically, the plate to be assessed is fixed to the fixture based on at least two target through holes and at least two bolt holes of the fixture, resulting in the sample to be assessed. The target prestress on the plate to be assessed is determined. The positions of the target through holes on the plate to be assessed are the same as the positions of the fixed through holes on the sample, and the number of target through holes is the same as the number of fixed through holes. The plate to be assessed consists of the plate to be assessed and the fixture fixed together. The sample to be assessed is continuously immersed in the corrosive medium for a preset time to obtain the number of target delayed cracks on the plate to be assessed. Based on the target prestress, the number of target cracks, and the delayed cracking reliability assessment diagram, a delayed cracking reliability assessment is performed on the plate to be assessed. The delayed cracking reliability assessment diagram includes a reliability critical zone, a reliability safe zone, and a reliability risk zone.

[0130] When selecting a new steel grade, this new steel grade is used as the plate to be evaluated. Based on the target prestress, target crack quantity, and delayed cracking reliability assessment chart, a delayed cracking reliability assessment is performed on the plate. This includes: for each prestress, determining the first set of points where the number of cracks is less than the first boundary value corresponding to the current prestress, and the second set of points where the number of cracks is greater than the second boundary value corresponding to the current prestress. The region formed by the first set of points corresponding to each prestress is defined as the reliability safe zone; the region formed by the second set of points corresponding to each prestress is defined as the reliability risk zone; and the region formed by the points between the first and second curves is defined as the reliability critical zone. The target positions of the target crack quantity and target prestress in the delayed cracking reliability assessment chart are determined. If the target position is within the reliability safe zone, the delayed cracking reliability of the plate to be evaluated is determined to be better than that of the sample plate. If the target position is within the reliability critical zone, the delayed cracking reliability of the plate to be evaluated is determined to be equal to that of the sample plate. If the target position is within the reliability risk zone, the delayed cracking reliability of the plate to be evaluated is determined to be worse than that of the sample plate.

[0131] The aforementioned delayed cracking reliability assessment method involves fixing the template to a fixing fixture using at least two fixing through holes and at least two bolt holes in the fixture, resulting in multiple samples. The prestress on each sample is determined, and the samples are continuously immersed in a corrosive medium for a preset time to obtain the number of delayed cracks on each sample. Based on the prestress and the number of delayed cracks on each sample, a delayed cracking reliability assessment chart is established through normal analysis. This method, which establishes the delayed cracking reliability assessment chart based on the number of delayed cracks in multiple samples in a corrosive medium, leverages the fact that the corrosive medium accelerates the delayed cracking rate of the samples, improving the efficiency of obtaining the delayed cracking reliability assessment chart and thus enhancing the efficiency of delayed cracking reliability assessment for the plate under evaluation. The delayed cracking reliability assessment chart can intuitively reflect the delayed cracking reliability, and assessing the delayed cracking reliability of the plate under evaluation based on the established chart further improves the efficiency of delayed cracking reliability assessment. Once a delayed cracking reliability assessment chart for a certain steel grade is established, it can be used to assess the delayed cracking reliability of new steel grades at the same strength level.

[0132] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0133] Based on the same inventive concept, this application also provides a delayed cracking reliability assessment device for implementing the delayed cracking reliability assessment method described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations in one or more embodiments of the delayed cracking reliability assessment device provided below can be found in the limitations of the delayed cracking reliability assessment method described above, and will not be repeated here.

[0134] In one embodiment, such as Figure 14 As shown, a delayed cracking reliability assessment device 100 is provided, including: a determination module 120, a control module 140, a setup module 160, and an assessment module 180, wherein:

[0135] The module 120 is used to fix the template to the fixing fixture based on at least two fixing through holes of the template and at least two bolt holes of the fixing fixture, to obtain multiple samples, and to determine the prestress on the template of each of the multiple samples; the sample consists of the template and the fixing fixture fixed together;

[0136] Control module 140 is used to control the continuous immersion of multiple samples in a corrosive medium for a preset time to obtain the number of delayed cracks on each sample plate.

[0137] Module 160 is established to create a delayed cracking reliability assessment map based on the prestress on each sample and the number of delayed cracks on each sample through normal analysis. The delayed cracking reliability assessment map is used to characterize the relationship between prestress and the number of cracks.

[0138] Evaluation module 180 is used to perform delayed cracking reliability evaluation on the board to be evaluated based on the delayed cracking reliability evaluation chart.

[0139] The aforementioned delayed cracking reliability assessment device fixes the sample to a fixing fixture through at least two fixing through holes and at least two bolt holes in the fixing fixture, obtaining multiple samples. It determines the prestress on each sample and controls the samples to be continuously immersed in a corrosive medium for a preset time, obtaining the number of delayed cracks on each sample's sample. Based on the prestress and the number of delayed cracks on each sample's sample, a delayed cracking reliability assessment map is established through normal analysis. This method of establishing a delayed cracking reliability assessment map based on the number of delayed cracks in multiple samples in a corrosive medium accelerates the delayed cracking rate of the samples, improving the efficiency of obtaining the delayed cracking reliability assessment map and thus improving the efficiency of delayed cracking reliability assessment of the plate under assessment. Furthermore, assessing the delayed cracking reliability of the plate under assessment based on the established delayed cracking reliability assessment map further enhances the efficiency of delayed cracking reliability assessment.

[0140] In one embodiment, to obtain multiple samples by fixing the template to the fixing fixture based on at least two fixing through holes of the template and at least two bolt holes of the fixing fixture, and to determine the prestress on the template of each of the multiple samples, the determining module 120 is further configured to: for each pair of fixing through holes in the at least two fixing through holes, fix the first fixing through hole to the first bolt hole, fix the second fixing through hole to the second bolt hole, and fix the template to the fixing fixture to obtain the current sample; the first bolt hole and the second bolt hole do not coincide; the first distance between the positions of the first fixing through hole and the second fixing through hole on the current sample is less than the second distance between the positions of the first fixing through hole and the second fixing through hole on the template; obtain the deflection and thickness of the current template corresponding to the current sample; and determine the prestress on the current template corresponding to the current sample based on the deflection, thickness, and the first distance corresponding to the current sample.

[0141] In one embodiment, in establishing a delayed cracking reliability assessment map through normal analysis based on the prestress on each sample and the number of delayed cracks on each sample, the establishment module 160 is further configured to: determine the mean and standard deviation of the number of cracks corresponding to the current prestress on the sample corresponding to the current sample; determine the confidence interval of the number of cracks corresponding to the current prestress based on the mean and standard deviation; the confidence interval of the number of cracks includes a first boundary value and a second boundary value, and the first boundary value is less than the second boundary value; determine a first curve based on the first boundary value corresponding to each prestress; determine a second curve based on the second boundary value corresponding to each prestress; and determine the delayed cracking reliability assessment map based on the first curve and the second curve.

[0142] In one embodiment, in assessing the delayed cracking reliability of the plate to be assessed based on the delayed cracking reliability assessment diagram, the assessment module 180 is further configured to: fix the plate to be assessed on the fixing fixture based on at least two target through holes and at least two bolt holes of the fixing fixture to obtain the sample to be assessed, and determine the target prestress on the plate to be assessed in the sample to be assessed; the position of the target through holes on the plate to be assessed is the same as the position of the fixing through holes on the sample, and the number of target through holes is the same as the number of fixing through holes; the plate to be assessed consists of the plate to be assessed and the fixing fixture fixed together; control the sample to be assessed to be continuously immersed in the corrosive medium for a preset time to obtain the number of target cracks for delayed cracking on the plate to be assessed in the sample to be assessed; and perform a delayed cracking reliability assessment on the plate to be assessed based on the target prestress, the number of target cracks, and the delayed cracking reliability assessment diagram.

[0143] In one embodiment, the delayed cracking reliability assessment map includes a reliability critical zone, a reliability safe zone, and a reliability risk zone. Regarding the delayed cracking reliability assessment of the plate to be assessed based on the target prestress, the target number of cracks, and the delayed cracking reliability assessment map, the assessment module 180 is further configured to: for each prestress, determine a first set of points where the number of cracks is less than the first boundary value corresponding to the current prestress, and a second set of points where the number of cracks is greater than the second boundary value corresponding to the current prestress; define the region formed by the first set of points corresponding to each prestress as the reliability safe zone; define the region formed by the second set of points corresponding to each prestress as the reliability risk zone; define the region formed by the points between the first curve and the second curve as the reliability critical zone; and perform a delayed cracking reliability assessment of the plate to be assessed based on the target prestress, the target number of cracks, the reliability critical zone, the reliability safe zone, and the reliability risk zone.

[0144] In one embodiment, in assessing the delayed cracking reliability of the plate to be evaluated based on the target prestress, target number of cracks, reliability critical zone, reliability safe zone, and reliability risk zone, the evaluation module 180 is further configured to: determine the target positions of the target number of cracks and the target prestress in the delayed cracking reliability evaluation chart; determine that the delayed cracking reliability of the plate to be evaluated is better than that of the sample plate when the target position is located in the reliability safe zone; determine that the delayed cracking reliability of the plate to be evaluated is equal to that of the sample plate when the target position is located in the reliability critical zone; and determine that the delayed cracking reliability of the plate to be evaluated is worse than that of the sample plate when the target position is located in the reliability risk zone.

[0145] Each module in the aforementioned delayed cracking reliability assessment device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0146] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 15As shown. The computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a delayed cracking reliability assessment method. Those skilled in the art will understand that... Figure 15 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0147] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0148] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0149] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0150] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data shall comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0151] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0152] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0153] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for assessing the reliability of delayed cracking, characterized in that, The method includes: Based on at least two fixing holes of the template and at least two bolt holes of the fixing fixture, the template is fixed on the fixing fixture to obtain multiple samples, and the prestress on the template of each of the multiple samples is determined; the sample consists of a template and a fixing fixture fixed together. The number of delayed cracks on each sample is obtained by continuously immersing the multiple samples in the corrosive medium for a preset time. Based on the prestress on each sample and the number of delayed-initiation cracks on each sample, a delayed-initiation reliability assessment chart is established through normal analysis; the delayed-initiation reliability assessment chart is used to characterize the relationship between prestress and the number of cracks. Based on the aforementioned delayed cracking reliability assessment chart, a delayed cracking reliability assessment is performed on the board to be assessed. The method involves establishing a delayed cracking reliability assessment chart based on the prestress on each sample and the number of delayed cracks on each sample through normal analysis, including: For the current prestress on the template corresponding to the current sample, determine the mean and standard deviation of the number of cracks corresponding to the current prestress; Based on the mean and the standard deviation, a confidence interval for the number of cracks corresponding to the current prestress is determined; the confidence interval for the number of cracks includes a first boundary value and a second boundary value, and the first boundary value is less than the second boundary value; A first curve is determined based on the first boundary value corresponding to each prestress; a second curve is determined based on the second boundary value corresponding to each prestress. Based on the first curve and the second curve, a delayed cracking reliability assessment chart is determined.

2. The method according to claim 1, characterized in that, The template is fixed to the fixing fixture by at least two fixing through holes and at least two bolt holes based on the template, resulting in multiple samples. The prestress on the template of each of the multiple samples is then determined, including: For each pair of the at least two fixing through holes, the first fixing through hole is fixed to the first bolt hole, the second fixing through hole is fixed to the second bolt hole, and the template is fixed on the fixing fixture to obtain the current sample; the first bolt hole and the second bolt hole do not coincide; the first distance between the positions of the first fixing through hole and the second fixing through hole on the current sample is less than the second distance between the positions of the first fixing through hole and the second fixing through hole on the template; Obtain the deflection and thickness of the current sample corresponding to the current sample; The prestress on the current template corresponding to the current sample is determined based on the deflection, the thickness, and the first distance corresponding to the current sample.

3. The method according to claim 1, characterized in that, The delayed cracking reliability assessment of the board to be assessed, based on the delayed cracking reliability assessment chart, includes: Based on at least two target through holes in the plate to be evaluated and at least two bolt holes in the fixing fixture, the plate to be evaluated is fixed on the fixing fixture to obtain the sample to be evaluated, and the target prestress on the plate to be evaluated in the sample to be evaluated is determined; the position of the target through holes on the plate to be evaluated is the same as the position of the fixing through holes on the sample, and the number of target through holes is the same as the number of fixing through holes; the plate to be evaluated consists of the plate to be evaluated and the fixing fixture fixed together; The sample to be evaluated is continuously immersed in the corrosive medium for the preset time to obtain the target number of delayed cracks on the plate to be evaluated in the sample to be evaluated. Based on the target prestress, the target number of cracks, and the delayed cracking reliability assessment diagram, the delayed cracking reliability of the plate to be assessed is evaluated.

4. The method according to claim 3, characterized in that, The delayed cracking reliability assessment map includes a critical reliability zone, a safe reliability zone, and a risky reliability zone; the delayed cracking reliability assessment of the plate to be assessed based on the target prestress, the target number of cracks, and the delayed cracking reliability assessment map includes: For each prestress, determine a first set of points where the number of cracks is less than the first boundary value corresponding to the current prestress, and a second set of points where the number of cracks is greater than the second boundary value corresponding to the current prestress. The region consisting of the first set of points corresponding to each prestress is defined as the reliability safety zone; The region consisting of the second set of points corresponding to each prestress is defined as the reliability risk zone; The region formed by the points between the first curve and the second curve is defined as the reliability critical region; Based on the target prestress, the target number of cracks, the reliability critical zone, the reliability safe zone, and the reliability risk zone, a delayed cracking reliability assessment is performed on the plate to be evaluated.

5. The method according to claim 4, characterized in that, The delayed cracking reliability assessment of the plate to be evaluated, based on the target prestress, the target number of cracks, the critical reliability zone, the safe reliability zone, and the risk reliability zone, includes: Determine the target number of cracks and the target location of the target prestress in the delayed cracking reliability assessment diagram; If the target location is within the reliability safety zone, it is determined that the delayed cracking reliability of the board to be evaluated is better than that of the sample board; If the target location is within the reliability critical zone, the delayed cracking reliability of the board to be evaluated is determined to be equal to that of the sample board. If the target location is located in the reliability risk zone, the delayed cracking reliability of the board to be evaluated is determined to be inferior to that of the sample.

6. A delayed cracking reliability assessment device, characterized in that, The device includes: A determination module is used to fix the template to the fixing fixture based on at least two fixing through holes of the template and at least two bolt holes of the fixing fixture to obtain multiple samples, and to determine the prestress on the template of each of the multiple samples; the samples consist of templates and fixing fixtures fixed together; The control module is used to control the continuous immersion of the multiple samples in the corrosive medium for a preset time, and to obtain the number of delayed cracks on the sample plates of the multiple samples. A module is established to create a delayed cracking reliability assessment map based on the prestress on each sample and the number of delayed cracks on each sample through normal analysis; the delayed cracking reliability assessment map is used to characterize the relationship between prestress and the number of cracks. The evaluation module is used to perform a delayed cracking reliability evaluation on the board to be evaluated based on the delayed cracking reliability evaluation chart. The establishment module is used to determine the mean and standard deviation of the number of cracks corresponding to the current prestress on the template corresponding to the current sample; determine the confidence interval of the number of cracks corresponding to the current prestress based on the mean and the standard deviation; the confidence interval of the number of cracks includes a first boundary value and a second boundary value, and the first boundary value is less than the second boundary value; determine a first curve based on the first boundary value corresponding to each prestress; determine a second curve based on the second boundary value corresponding to each prestress; and determine a delayed cracking reliability assessment chart based on the first curve and the second curve.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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