Rubber Tensile Test (Type I Specimen)

Abstract: This article introduces the use of the Kunpeng BOYI 2025 electronic universal testing machine, combined with a large deformation extensometer and pneumatic double push-pull tensile fixtures, to conduct a rubber tensile test example according to "GB/T 528-2009 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber." The test results show that the Kunpeng BOYI 2025 electronic universal testing machine can fully meet the requirements of rubber tensile testing.

Keywords Kunpeng BOYI 2025 electronic universal testing machine Vulcanized rubber Thermoplastic rubber Tensile strength test

Vulcanized rubber refers to rubber that has been vulcanized, characterized by stable viscosity and resistance to breaking. Most rubber products are made from this type of rubber. Due to the excellent elasticity and toughness of rubber, rubber products are widely used in machinery, automotive, electronics, medical, construction, aerospace, and other fields, playing a significant role in human production and life.

The Kunpeng testing machine is equipped with pneumatic double push-pull tensile fixtures that can continuously provide constant clamping force during the tearing process. During stretching, as the specimen elongates and thins, the pneumatic fixtures can firmly hold the sample without slipping or detachment. With the foot switch, quick positioning and clamping before testing and return replacement after testing can be achieved, improving operational convenience and testing efficiency, greatly saving test time. Meanwhile, the fixtures are equipped with a throttle valve to adjust the clamping speed, avoiding large pre-stress and ensuring result accuracy. The large deformation extensometer can realize gauge length changes from 10mm to 200mm. Change In this test, a 25mm gauge length was used, which can accurately measure the elongation of rubber products, while the minimal friction does not affect the final result calculation. Besides the fixtures, the high precision of the testing machine main unit and the data acquisition frequency exceeding 1000Hz can fully record all characteristic data during the tensile process, providing users with accurate and reliable test data. Coupled with intelligent testing software, it can simultaneously provide various test curves such as single specimen, multiple specimens, and dual coordinates, allowing different users to have a good interactive experience, safeguarding enterprise R&D, quality, and product control.

1. Test Section

1.1 Instruments and Fixtures

BOYI 2025-001 Electronic Universal Testing Machine

500N Pneumatic Double Push-Pull Tensile Fixtures

Large Deformation Extensometer

Smartest Software

1.2 Analysis Conditions

Test temperature: Room temperature around 22°C

Load sensor: 1000N (Class 0.5)

Loading test speed: 500mm/min

Gauge length: 25mm

    1.3 Samples and Treatment

In this test, two types of rubber specimens with a thickness of 2mm were selected. The specimens were cut into I-shaped samples according to the standard, with 5 pieces each.

2. Test Introduction

The test was conducted using the BOYI 2025-001 electronic universal testing machine. The cut samples were clamped in the upper and lower fixtures, the large deformation device was installed, and the tensile test was performed at a speed of 500mm/min until the specimen broke. Force and displacement data during the process were measured, and tensile curves were generated.

Figure 3 Test system diagram (main unit, fixtures)

3. Results and Conclusions

3.1 Test Results

The specific test results are shown in Table 1 below.

Table 1. Test Results

Figure 4 - Test Curve #1

Figure 5 - Test Curve #2

Figure 6 - Post-test Sample #1

Figure 7 - Post-test Sample #2

  From the above (Table 1) data and test curves, it can be seen that after the test starts, the load continuously rises to the maximum force point, and the sample is stretched until fracture. The software can record the complete test curve throughout the process, obtaining data such as maximum force, stress, strain, and displacement stroke for analysis. The test results reflect the high precision and high stability of the Kunpeng BOYI 2025-001 electronic universal testing machine.

4. Conclusion

The above test results indicate that the Kunpeng BOYI 2025-001 electronic universal testing machine, combined with the large deformation extensometer and pneumatic double push-pull tensile fixtures, can fully meet the standard requirements of "GB/T 528-2009 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber," efficiently and with high quality. Through the high-precision and high-sampling-rate testing system, various mechanical data of rubber materials can be obtained reliably and stably. This is very important for the technological development of rubber materials and can provide data support and technical assurance for enterprise product R&D, quality management, and the standardization and normalization of the industry.