Load type dynamic shear deformation experimental platform and method for evaluating adhesion and fatigue resistance effects of rubber and rubber cord fabric

Abstract

The invention relates to the technical field of rubber material performance detection, in particular to a dynamic test platform and method for evaluating the bonding effect and fatigue life of rubber and a rubber cord fabric. The dynamic test platform comprises a driving mechanism, a test platform, a clamping mechanism, a monitoring system, a data acquisition module, a control system and a data analysis module. The driving mechanism can adjust the frequency, the displacement amplitude and the acceleration of loading deformation; the test platform supports normal loading pressure to realize simulation of different load working conditions; the clamping mechanism is a two-way adjustable clamp, and free displacement is achieved through a sliding rail mechanism; the monitoring system integrates a force sensor, a displacement sensor and a temperature sensor. The data acquisition module records loading process data; the control system sets parameters through a touch interface and monitors the test in real time; and the data analysis module generates an adhesion performance, fatigue life and damage form evaluation report based on an algorithm. The device can accurately reproduce the adhesive property change under the dynamic working condition, comprehensively analyzes the adhesive strength and fatigue life, provides a scientific basis for research and development and quality control of rubber products, and is suitable for testing the adhesive property of composite materials such as tires and transmission belts.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber material performance testing, and particularly to a dynamic test platform and method for evaluating the adhesion effect and fatigue life of rubber and rubber cord fabric. Background Art

[0002] In the production and application of rubber products, the adhesion performance between rubber and rubber cord fabric directly affects the service life and safety of products. For example, products such as tires, conveyor belts, rubber hoses, and seals all require good adhesion between rubber and reinforcing materials. In the prior art, the evaluation of adhesion performance mainly adopts static test methods, such as peel strength test or tensile strength test. These methods evaluate the adhesion strength by applying a constant load or gradually increasing the load. However, the static test has the following technical limitations: 1. Lack of real simulation of dynamic working conditions: Rubber and rubber cord fabric are often under dynamic load conditions in actual applications. For example, tires are affected by complex factors such as shear force, acceleration, and temperature during starting, braking, or turning. Static tests cannot accurately reflect the stress distribution and fatigue characteristics of the adhesion interface under dynamic working conditions, resulting in a large deviation between experimental results and actual use conditions.

[0003] 2. Ignoring the comprehensive influence of environmental factors: In actual applications, the adhesion performance of rubber and rubber cord fabric is affected not only by mechanical forces but also by multiple factors such as environmental temperature, humidity, and the normal direction load on their adhesion surface. There is a lack of test methods in the prior art that can simultaneously simulate multiple environmental conditions, making it difficult to provide a comprehensive performance evaluation.

[0004] 3. Lack of evaluation of adhesion fatigue performance: Under dynamic loading conditions, the adhesion performance between rubber and rubber cord fabric usually gradually decreases due to long-term repeated loads, manifested as interface debonding or a decrease in adhesion strength, i.e., failure to reach the fatigue life. Existing test methods mainly focus on the measurement of initial adhesion strength and fail to effectively evaluate the fatigue life of the adhesion interface.

[0005] To solve the above technical problems, the prior art has gradually tried to introduce dynamic test equipment, but there are still the following deficiencies: (1) The loading method of the test equipment is single, and it is impossible to simulate the complex dynamic working conditions of rubber products in reality, such as precise regulation of loading speed, displacement (i.e., deformation amount), or loading frequency, or pressure loading in the normal direction of shear deformation; (2) The test system lacks the function of real-time monitoring of multiple parameters, making it difficult to comprehensively record and analyze the change law of adhesion performance under dynamic conditions; (3) The degree of intelligence of data analysis and result output is low, and it is difficult to provide a reliable basis for product design and process optimization.

[0006] Therefore, there is an urgent need for a test method and device that can comprehensively simulate dynamic working conditions and monitor the bonding performance in real time, so as to accurately evaluate the bonding effect between rubber and cord fabric and provide a scientific basis for improving product performance and production processes. The above technical solution should be able to overcome the deficiencies of the existing technology. Through innovative loading methods, multi-parameter monitoring systems, and intelligent data analysis modules, it can more effectively simulate the performance behavior of products under real working conditions, improve the test accuracy and efficiency, and meet the actual needs of the rubber products industry. Summary of the Invention

[0007] To solve the above technical problems, the present invention provides a dynamic test platform for evaluating the bonding effect between rubber and cord fabric. This dynamic test platform can accurately reproduce the changes in bonding performance under dynamic working conditions, comprehensively analyze the bonding strength and fatigue life, provide a scientific basis for the research and development and quality control of rubber products, and is applicable to the bonding performance testing of composite materials such as tires and conveyor belts.

[0008] To achieve the above objectives, the present invention adopts the following technical solutions: A dynamic test platform for evaluating the bonding and fatigue resistance effect between rubber and cord fabric, the test platform includes: A frame and a closed test cavity, and a clamping mechanism, a pressure loading device, and a monitoring device are arranged in the test cavity; The clamping mechanism includes an upper clamp and a lower clamp. The upper clamp is fixedly arranged on a first sliding device that reciprocates in the Y direction, facilitating the adjustment of the clamping effect; the lower clamp is fixedly arranged on a second sliding device that reciprocates in the X direction. The second sliding device is connected to a driving mechanism for driving the second sliding device to reciprocate. The driving mechanism can dynamically load frequency, speed, and acceleration on the lower clamp, generating shear fatigue deformation on the test sample; The variable pressure loading device is provided with a pressure head, and the pressure head faces the upper clamp downward, and can load different pressures in the normal direction of the sample deformation; The monitoring device includes a force sensor, a displacement sensor, and a temperature sensor. The force sensor is arranged on the connecting rod between the upper clamp and the first sliding device, and is used to detect different pressures loaded in the normal direction of the sample deformation; the displacement sensor is arranged on one side of the second sliding device and is used to detect the reciprocating motion speed and acceleration of the lower clamp.

[0009] Preferably, the dynamic test platform further includes a sample preparation vulcanization mold. The middle part of the sample after being pressurized and vulcanized by the sample preparation vulcanization mold is cylindrical. The cord fabric is arranged at the middle position of the cylinder, and cylindrical bosses for clamping by the clamping mechanism are arranged on the upper and lower surfaces of the rubber.

[0010] Preferably, both the upper clamp and the lower clamp are provided with openings, and locking structures for locking the openings are provided at the openings.

[0011] Preferably, the first sliding device includes a first slider, and the first slider is slidably arranged on the Y guide rail.

[0012] Preferably, the second sliding device includes a second slider, which is slidably arranged on the X-guide rail. The driving mechanism is realized by a servo drive motor, which is connected to a gear or screw transmission mechanism with an adjustable gear ratio for accurately controlling the loading frequency, speed and acceleration.

[0013] Preferably, the normal load pressure of the test platform includes a hydraulic transmission device for achieving pressure adjustment in the range of 10-6000 N; Preferably, the dynamic test platform also includes electric heating and liquid cooling devices for achieving temperature adjustment in the range of -20°C to 150°C.

[0014] Preferably, the dynamic test platform further comprises a data acquisition module: for recording the shear force, displacement, temperature and deformation times during the dynamic loading process; Control system: set test parameters through the touch interface and monitor the test process in real time; Data Analysis Module: Analyzes test data based on built-in algorithms and generates adhesion performance reports.

[0015] Preferably, the data acquisition module is connected to a cloud data storage system via a wireless communication module to achieve remote data storage and analysis.

[0016] Furthermore, the present invention also provides a dynamic test method for evaluating the adhesion and fatigue resistance of rubber and rubber cord fabric, the method using the dynamic test platform, comprising the following steps: 1) Sample preparation: Cut the rubber and rubber cord cloth into specified sizes, bond the rubber cord cloth between two layers of rubber, and hot-press vulcanize to form a sample. The middle of the sample is cylindrical, the rubber cord cloth is set in the middle of the cylinder, and cylindrical bosses for clamping by the clamping mechanism are set on the upper and lower surfaces of the rubber; 2) Fix the sample: Fix the sample on the test platform through the clamping mechanism, adjust the position of the upper fixture, and lock and clamp the upper and lower cylindrical bosses on the upper fixture and the lower fixture respectively. 3) Dynamic loading condition setting: Dynamic loading parameters are set through the driving mechanism, the lower fixture is connected and transmitted to the sample to generate shear deformation, including loading frequency of 0.1 Hz to 100 Hz, shear deformation displacement of 0.1 to 100 mm, and acceleration of 0.5 m / s² to 15 m / s²; 4) Pressurizing device: The variable-pressure loading device can apply different pressures in the normal direction of the deformation of the sample, ranging from 10 N to 6000 N; 5) Test execution and monitoring: Start the driving mechanism to simulate the dynamic working conditions, and the monitoring system records the shear force, displacement, temperature, number of shears, and fatigue damage in real time. The monitoring system includes the force sensor, the displacement sensor, and the temperature sensor; 6) Data processing and analysis: Input the data recorded by the monitoring system into the data analysis module, and analyze the dynamic adhesion performance indicators of the rubber and the rubberized cord, including adhesion strength, fatigue life, and failure mode; 7) Generate test report: Generate an adhesion performance report according to the analysis results. The report content includes test conditions, adhesion strength, fatigue life curve, and failure mode image.

[0017] Preferably, by inputting multiple groups of test data and based on the machine learning algorithm, an adhesion performance prediction model of the rubber and the rubberized cord is established for optimizing the adhesive formula or process parameters.

[0018] Due to the adoption of the above technical solutions, the present invention can provide precisely adjustable loading frequency, speed, and acceleration, with a wide range of dynamic loading parameters (loading frequency from 0.1 Hz to 10 Hz, shear speed from 0.1 m / s to 5 m / s, acceleration from 0.5 m / s² to 15 m / s²), and can truly reproduce the complex dynamic working conditions of the rubber and the rubberized cord in actual applications, such as the fatigue failure situations between the internal components of the tire under scenarios like vehicle start-up, braking, and vibration. This makes the test results closer to the actual use conditions, significantly improving the authenticity and reliability of the test. Further, the test platform of the present invention can simulate a variety of road surface and temperature environments through the adjustable surface roughness module (roughness range Ra 0.1 to Ra 10.0) and the temperature control device (temperature range from -20°C to 150°C), providing diverse test conditions for the comprehensive evaluation of the adhesion performance. Compared with the traditional static test, the present invention can systematically analyze the influence of environmental factors on the adhesion performance, providing a more scientific basis for material development and optimization. At the same time, the monitoring system integrates high-precision force sensors, laser displacement sensors, and temperature sensors, and can record dynamic parameters such as shear force, displacement, temperature, and number of shears in real time. Through the monitoring of multi-dimensional data, the present invention can not only quantify the adhesion strength but also analyze the evolution process of interface fatigue damage. This multi-parameter monitoring ability significantly improves the comprehensiveness and accuracy of the test. In addition, by simulating the long-term repeated load under dynamic working conditions, the present invention can effectively evaluate the adhesion fatigue life of the rubber and the rubberized cord. This ability fills the gap in the evaluation of adhesion fatigue performance in the prior art and provides an important basis for predicting the reliability of products under actual use conditions.

[0019] In summary, the present invention can significantly improve the accuracy, efficiency, and applicability of the adhesion performance test between rubber and rubber cord fabric, providing an innovative solution for product development and quality control in the rubber product industry, and having significant technological progress and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural block diagram of the dynamic test platform of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the test equipment.

[0022] Figure 3 It is a structural schematic diagram of the test sample. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Referring to the attached Figure 1 As shown, a dynamic test platform for evaluating the adhesion and fatigue resistance effect between rubber and rubber cord fabric is used to simulate the stress, deformation, and environmental conditions of different test samples during the fatigue process. An electric heating and liquid cooling device is also equipped inside or on the back of the test platform, and the temperature adjustment range is from -20°C to 150°C, so as to meet the need for precise control of the environmental temperature to simulate the influence of high-temperature and low-temperature working conditions on the adhesion performance.

[0025] Such as Figure 2 As shown, it mainly includes the following parts: a sample preparation vulcanization mold, a frame, and a closed test cavity. A clamping mechanism, a pressure loading device, and a monitoring device are arranged in the test cavity.

[0026] 1. Sample preparation vulcanization mold Such as Figure 3 As shown, the middle part of the sample 9 after pressure vulcanization by the sample preparation vulcanization mold is cylindrical, the rubber cord fabric 91 is arranged in the middle position of the cylinder, and cylindrical bosses 93 for clamping by the clamping mechanism are arranged on the upper and lower surfaces of the rubber 92.

[0027] 2. Clamping mechanism The clamping mechanism includes an upper fixture 2 and a lower fixture 3. Both the upper fixture 2 and the lower fixture 3 are provided with opening ports, and a locking structure for locking the opening ports is arranged at the position of the opening ports. It can fix rubber and rubberized fabric specimens with different sizes and thicknesses. The adjustable range of the clamping force is from 10 N to 500 N. The clamping surface is made of a flexible material or has anti-slip texture to reduce additional damage to the bonding interface of the specimen, and at the same time ensure firm positioning during the test.

[0028] The upper fixture 2 is fixedly arranged on a first sliding device that reciprocates in the Y direction. The first sliding device includes a first slider, and the first slider is slidably arranged on a Y-direction guide rail. The lower fixture 3 is fixedly arranged on a second sliding device that reciprocates in the X direction. The second sliding device includes a second slider, and the second slider is slidably arranged on an X-direction guide rail. The second sliding device is connected with a driving mechanism 4 for driving the second sliding device to reciprocate. The driving mechanism 4 can dynamically load frequency, speed, and acceleration onto the lower fixture 3.

[0029] The driving mechanism 4 is composed of a servo motor, a gear transmission device, and a transmission mechanism with an adjustable gear ratio, and is used to achieve dynamic loading of the test specimen. By adjusting the rotational speed, torque of the servo motor, and the gear transmission ratio, the loading frequency (0.1 Hz to 10 Hz), speed (0.1 m / s to 5 m / s), and acceleration (0.5 m / s² to 15 m / s²) can be accurately controlled. In actual operation, the servo motor is connected to a reciprocating push rod or rotating shaft of the gear transmission mechanism to apply shear force or bending force to the specimen on the test platform, simulating different dynamic conditions such as road surface starting, braking, or vibration.

[0030] 3. Pressure loading device The variable-pressure loading device is provided with a pressure head 5. The pressure head 5 faces the upper fixture 2 downward and can load different pressures in the normal direction of the deformation of the sample 9, with the pressure ranging from 10 N to 6000 N.

[0031] 4. Monitoring device The monitoring device includes a high-precision force sensor 6 (measurement range 0 to 5000 N), a displacement sensor 7 (using a laser displacement sensor with a resolution of not less than 0.01 mm), and a temperature sensor 8 (measurement range -40°C to 200°C). These sensors can monitor the shear force, deformation amount, and temperature change of the specimen during the test in real time. The monitoring system cooperates with a data acquisition module and can continuously record the dynamic change parameters during the test at different sampling frequencies, such as the number of shear times, acceleration, force-displacement curve, modulus-number of cycles curve, temperature curve, etc.

[0032] 5. Data acquisition and analysis module The data acquisition module is connected to the monitoring system through wired or wireless communication methods to obtain and store data such as shear force, displacement, and temperature in real time. The data analysis module is built-in with machine learning algorithms or other big data analysis methods. By fitting and training multiple sets of experimental data, a prediction model for the adhesion performance of rubber and rubberized fabric is established, and evaluation indicators such as adhesion strength, fatigue life, and failure mode are output.

[0033] 6. Control System The parameter setting and process monitoring are realized by using a touch screen interface or a host computer software. The operator can set key parameters such as loading mode (constant speed, variable speed, constant acceleration, etc.), test platform temperature, clamping force, and monitoring frequency in the interface.

[0034] The system provides automatic or manual operation modes, can automatically generate reports after the test is completed, and supports uploading data to the cloud through the network for backup or further analysis.

[0035] The following combines the core principle of the present invention to give an example of a typical test process to illustrate how the system realizes the dynamic evaluation of the adhesion effect of rubber and rubberized fabric.

[0036] 1. Specimen Preparation Test specimens with a width of 40 mm and a length of 100 mm are cut from rubber and rubberized fabric materials of the same production batch. The bonding surfaces of the specimens are surface-treated as follows: 1) The surface of the rubberized fabric is roughened with 400-mesh sandpaper; 2) The specified adhesive is evenly coated on the surface of the rubberized fabric; 3) The rubber and the rubberized fabric are hot-pressed under a specified pressure to form a preliminary bonding layer; 4) The specimens are placed at room temperature for at least 24 hours for curing; 5) After the specimens are prepared and vulcanized in a vulcanization mold under pressure, the middle part of the specimen is cylindrical. The rubberized fabric is arranged in the middle position of the cylinder, and cylindrical bosses for clamping by the clamping mechanism are arranged on the upper and lower surfaces of the rubber.

[0037] 2. Device Debugging and Parameter Setting On the test platform, a metal alloy plate with a thickness of 2 mm is selected as the surface material, and the surface roughness Ra is 2.0 to simulate a road surface with medium roughness.

[0038] The electric heating device is started, and the test platform is heated to 80 °C to simulate the adhesion performance under higher temperature conditions.

[0039] The test parameters are input in the control system interface: Dynamic shear reciprocating deformation displacement: ±5 mm; Displacement deformation frequency: 5 Hz; Normal loading pressure: 2000 N; Total test time: 10 minutes (cumulative shear fatigue times = 5 Hz × 60 s × 10 min = 3000 times).

[0040] 3. Specimen installation and start of test Install the prepared rubber - cord fabric specimen into the clamping mechanism, and adjust the fixture to firmly clamp it without causing excessive deformation or pre - damage to the specimen.

[0041] Start the servo motor and perform reciprocating shear loading under the set fatigue deformation frequency and displacement conditions.

[0042] The monitoring system starts synchronously. The force sensor and laser displacement sensor record the shear force and deformation in real - time, and the temperature sensor records the surface temperature of the specimen.

[0043] The system automatically accumulates the shear times in each reciprocating cycle and saves the real - time data.

[0044] 4. Data acquisition and analysis As the test progresses, the data acquisition module continuously records the force - displacement curve, temperature change curve, and cumulative shear times.

[0045] After the test is completed, the data analysis module automatically processes the measured data, including: Adhesion strength calculation: Select the maximum or average shear force in the stable stage as the characterization of the adhesion strength; Fatigue life analysis: Statistically analyze the modulus change of the adhesive interface under cyclic loading, and record the fatigue life when the original modulus is reduced to half; if failure occurs in advance (such as interface detachment, crack propagation), record the failure cycle number; Failure mode identification: Combine sensor information and manual observation to determine whether it is adhesive - adhesive interface failure, adhesive - cord fabric interface failure, or mixed failure.

[0046] 5. Result output and process optimization The control system generates a "Bonding Performance Test Report" for the analysis results, specifically including: Test parameters (frequency, displacement, normal pressure, temperature, etc.); Adhesion strength value and fatigue life curve; Failure mode and corresponding image or data description.

[0047] Combined with machine - learning algorithms, if there are multiple sets of material formula or different adhesive test data, the system can propose directions for formula optimization or process improvement suggestions. For example, improve the bonding performance by changing the adhesive composition, adjusting the surface roughness, or controlling the heating temperature, etc.

[0048] The following presents a set of exemplary experimental data to further demonstrate the evaluation ability of the present invention for the adhesion effect between rubber and rubberized cord fabric during the dynamic test. It should be noted that these data are only used to illustrate the feasibility of the present invention and the testing method, and are not a limitation to the present invention.

[0049] I. Experimental Purpose Verify: Whether there are significant differences in the mechanical properties and failure modes of the adhesion interface between rubber and rubberized cord fabric under different test conditions (such as deformation amplitude, deformation frequency, ambient temperature, load pressure, number of cycles, etc.).

[0050] Evaluate: Whether the dynamic test system described in the present invention can accurately characterize the mechanical changes and fatigue damage of the adhesion interface under different dynamic working conditions.

[0051] II. Specimens and Test Conditions 1. Specimen Materials: Rubber: Using the common formula for tire tread, with a thickness of about 10 mm; Rubberized cord fabric: Polyester cord woven fabric, with a thickness of about 1 mm; Adhesion method: Using the specified adhesive, hot-pressed and cured at room temperature for more than 24 hours; The structure of the vulcanized specimen is as Figure 3 shown.

[0052] 2. Test Equipment: The dynamic test platform described in the present invention.

[0053] 3. Test Parameter Settings: Test platform temperature: Set to 25°C (room temperature) or 80°C (simulating a higher temperature environment); Shear deformation displacement: Set to four gears of 1 mm, 3 mm, 5 mm, and 10 mm; Shear deformation loading frequency: Automatically matched by the control system according to speed and stroke, and maintained in the range of 3 - 5 Hz; Normal pressure loading: Freely set and adjusted from 10 N to 6000 N; Roughness of the bottom contact surface: Fixed at Ra 2.0; Testing method: Reciprocating shear, record the force-displacement data and the cumulative number of cycles until the adhesion interface fails or reaches the preset cycle upper limit.

[0054] III. Example of Experimental Data The following gives the comparison data of five groups of specimens (S1 - S5) under different speed and temperature conditions. During the test, each group of specimens was subjected to dynamic reciprocating shear until obvious adhesion failure occurred or the set maximum number of cycles (3000 times) was reached. The monitoring system recorded the mechanical data and failure mode in real time. Sample ID Shear displacement (mm) Test temperature (℃) Number of reciprocating shear cycles Shear strength* (MPa) Failure mode and observation S1 1.0 25 3000 cycles (not damaged) 4.5 No obvious damage, interface intact S2 1.0 80 3000 cycles (not damaged) 4.2 Local surface fine cracks S3 2.0 25 2500 cycles (damaged) 3.8 Local rubber - cord separation began to appear S4 2.0 80 2000 cycles (damaged) 3.4 Large - area interface separation, cord exposed S5 5.0 80 1500 cycles (damaged) 2.9 Interface failed rapidly, serious separation

[0055] Note: The "shear strength" in the table refers to the ratio of the peak force measured during the test to the bonding area, and the failure mode is judged based on subsequent dissection or visual inspection.

[0056] IV. Analysis of Experimental Results 1. Influence of Speed and Temperature on Bonding Failure At low speeds (S1, S2), 3000 shear cycles can be completed under the conditions of 25 °C or 80 °C, and no obvious failure occurred in the specimens. Only slight surface cracks appeared at 80 °C (S2), and it is speculated that high temperature has a certain influence on the softness of the rubber material and the stress concentration at the bonding interface.

[0057] At medium speeds (S3, S4) and high speeds (S5), with the increase of temperature and speed, fatigue failure is more likely to occur at the bonding interface: S3 failed at 2500 cycles at room temperature of 25 °C, while S4 showed large-area delamination at 2000 cycles at 80 °C; S5 even had serious failure after only 1500 cycles under the large shear condition of 5 mm.

[0058] 2. Relationship between Bonding Strength and Number of Cycles The shear strength gradually decreases with the increase of the number of cycles, especially more rapidly under high temperature and high speed conditions. The "shear strength" given in the table is the maximum value, and it only reaches 2.9 MPa under the high temperature / high deformation combination (S5), which is significantly lower than 4.5 MPa at room temperature and low speed (S1).

[0059] From the failure mode, it can be seen that high deformation and high temperature cause the molecular chains in the bonding layer to move more intensively, and stress concentration at the interface leads to early delamination, resulting in a rapid decay of the bonding strength.

[0060] 3. Failure Mode and Failure Mechanism S1 and S2 did not have complete interface delamination within the set upper limit of reciprocating cycles (3000 cycles), showing good bonding effects; although S2 had fine cracks on the surface, the overall bonding property was still relatively stable.

[0061] Obvious interface delamination or tearing occurred in S3, S4, and S5. Especially under the conditions of high deformation and high temperature of S5, the fatigue failure of the rubber - rubberized cord bonding interface was accelerated.

[0062] 4. Effectiveness of the Device and Method of the Present Invention Through the dynamic test device with adjustable speed, temperature, and loading frequency, the present invention can effectively distinguish the bonding performance differences between rubber and rubberized cord under different dynamic conditions, and the data acquisition system accurately records the modulus - fatigue number curve, temperature change, and failure mode.

[0063] The data analysis module quickly generates the adhesion performance curve and the failure mode report, indicating that the adhesion life is significantly shortened under high temperature and high speed conditions, providing clear guidance for production enterprises to optimize material formulations, heat treatment processes or usage conditions.

[0064] The above is the description of the embodiments of the present invention. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A load-type dynamic shear deformation dynamic test platform for evaluating the adhesion and fatigue resistance of rubber and cord fabric, characterized in that The test platform includes: A frame and a closed test chamber (1), wherein a clamping mechanism, a pressure loading device and a monitoring device are arranged in the test chamber (1); The clamping mechanism comprises an upper clamp (2) and a lower clamp (3), the upper clamp (2) being fixedly arranged on a first sliding device that reciprocates in the Y direction, and the lower clamp (3) being fixedly arranged on a second sliding device that reciprocates in the X direction, the second sliding device being connected to a driving mechanism (4) for driving the second sliding device to reciprocate, the driving mechanism (4) being capable of dynamically loading frequency, speed and acceleration on the lower clamp (3) to generate shear fatigue deformation on the test sample; The variable pressure loading device is provided with a pressure head (5), the pressure head (5) is downwardly facing the upper clamp (2), and can load different pressures in the normal direction of sample deformation; The monitoring device comprises a force sensor (6), a displacement sensor (7) and a temperature sensor (8); the force sensor (6) is arranged on a connecting rod between the upper clamp (2) and the first sliding device, and is used to detect different pressures applied in the normal direction of the sample deformation; the displacement sensor (7) is arranged on one side of the second sliding device, and is used to detect the reciprocating speed and acceleration of the lower clamp (3).

2. The dynamic test platform according to claim 1, characterized in that, The dynamic test platform also includes a sample preparation vulcanization mold. After the sample preparation vulcanization mold is pressurized and vulcanized, the middle part of the sample (9) is cylindrical, the rubber curtain cloth (91) is arranged in the middle position of the cylinder, and cylindrical bosses (93) for clamping by a clamping mechanism are arranged on the upper and lower surfaces of the rubber (92).

3. The dynamic test platform according to claim 1, characterized in that Both the upper clamp (2) and the lower clamp (3) are provided with an opening, and a locking structure for locking the opening is provided at the position of the opening.

4. The dynamic test platform according to claim 1, wherein The first sliding device includes a first sliding block, and the first sliding block is slidably arranged on the Y guide rail.

5. The dynamic test platform according to claim 1, wherein The second sliding device comprises a second slider, which is slidably arranged on the X-guide rail. The driving mechanism (4) is implemented by a servo drive motor, which is connected to a gear or screw transmission mechanism with an adjustable gear ratio, and is used to accurately control the loading frequency, speed and acceleration.

6. The dynamic test platform according to claim 1, characterized in that The dynamic test platform also includes electric heating and liquid cooling devices to achieve temperature adjustment in the range of -20°C to 150°C.

7. The dynamic test platform according to claim 1, characterized in that, The dynamic test platform also includes a data acquisition module: used to record the shear force, displacement, temperature and deformation times during dynamic loading; Control system: set test parameters through the touch interface and monitor the test process in real time; Data Analysis Module: Analyzes test data based on built-in algorithms and generates adhesion performance reports.

8. The dynamic test platform according to claim 1, wherein The data acquisition module is connected to the cloud data storage system via the wireless communication module to achieve remote data storage and analysis.

9. A dynamic test method for evaluating the adhesion and fatigue resistance effect of rubber and rubber cord fabric, characterized in that, The method uses the dynamic test platform described in any one of claims 1 to 6, and comprises the following steps: 1) Sample preparation: Cut the rubber and rubber cord cloth into specified sizes, bond the rubber cord cloth between two layers of rubber, and hot-press vulcanize to form a sample. The middle of the sample is cylindrical, the rubber cord cloth is set in the middle of the cylinder, and cylindrical bosses for clamping by the clamping mechanism are set on the upper and lower surfaces of the rubber; 2) Fix the specimen: Fix the specimen on the test platform through the clamping mechanism, adjust the position of the upper fixture (2), and lock and clamp the upper and lower cylindrical bosses on the upper fixture (2) and the lower fixture (3) respectively. 3) Set dynamic loading conditions: Set the dynamic loading parameters through the driving mechanism (4), connect the lower fixture (3) and conduct them to the sample to generate shear deformation, including the loading frequency ranging from 0.1 Hz to 100 Hz, the shear deformation displacement ranging from 0.1 to 100 mm, and the acceleration ranging from 0.5 m / s² to 15 m / s². 4) Pressure device: The variable pressure loading device can apply different pressures in the normal direction of the deformation of the sample, ranging from 10 N to 6000 N. 5) Test execution and monitoring: Start the driving mechanism (4) to simulate the dynamic working condition, and the monitoring system records the shear force, displacement, temperature, shear times and fatigue damage in real time. The monitoring system includes the force sensor (6), the displacement sensor (7) and the temperature sensor (8). 6) Data processing and analysis: Input the data recorded by the monitoring system into the data analysis module to analyze the dynamic adhesion performance indexes of the rubber and the rubberized fabric, including the adhesion strength, fatigue life and failure mode. 7) Generate a test report: Generate an adhesion performance report according to the analysis results. The report content includes test conditions, adhesion strength, fatigue life curve and failure mode image.

10. The method according to claim 9, characterized in that, By inputting multiple groups of test data and based on the machine learning algorithm, establish a prediction model for the adhesion performance of rubber and rubberized fabric, which is used to optimize the adhesive formula or process parameters.

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