Because of its good elasticity and plasticity, it is widely used in different industries, but different industries have different requirements for rubber materials. Therefore, a detailed study of the mechanical properties of rubber materials is required to determine whether they meet the relevant product requirements. When you use the Rubber Tensile Testing Machine to do the rubber tensile test, you need to pay attention to the following things.
What data do we need first to test the mechanical properties of rubberten
According to the relevant rubber tensile testing standards, rubber tensile tests generally receive the following or seven parameters:
1. The maximum force value (tensile strength)
2. The force value when the sample breaks (breaking strength)
3. The force value corresponding to the yield point (tensile yield point)
4. The force value when the sample is stretched to a specified strain (Instantaneous Stress)
5. Elongation when the sample is stretched to a certain stress (Dehnung at a certain voltage)
6. Elongation according to the yield point (Elongation at the yield point Elongation)
7. The elongation at break of the sample (elongation at break )
Second, the choice of rubber tensile testing machine
According to the above parameters, two pieces of data must be recorded in the rubber tensile test: tensile force value and gauge length change. Therefore, the rubber tensile testing machine to test the tensile properties of rubber must meet the following four requirements:
1, big bar
Because rubber deforms a lot when stretched, especially latex products, the elongation can be up to 1000%. Therefore, before the rubber sample breaks, it is necessary to ensure that the rubber tensile testing machine has sufficient stroke, and it is generally recommended that the stroke is more than 1.2m.
2, high-precision and high-frequency data collection
Stretching the rubber doesn't require much force, but the accuracy of the force value is high. In general, the testing machine must be able to calculate the accuracy of more than two decimal places Kraft value. In addition, since testing the tensile properties of rubber requires multiple tensile values during the elongation process and tensile testing is not repeatable, it is very important to capture the tensile force value of each test section instantaneously and accurately for the success of the test.
3, Accurate measuring and recording device
Measuring the gauge length of the specimen is an important information to calculate the elongation of the rubber, so the tensile testing machine needs to accurately measure the stress of the specimen in the rubber tensile test variables and record them in real time. In order to accurately measure the elongation of rubber, it is necessary to configure a large deformation device that is used specifically for rubber tensile testing.
4, can describe the stress-strain curve
In the rubber tensile test, there is a close relationship between the tensile value and the gauge length. The built-in microcomputer of the rubber tensile testing machine can accurately calculate the entire stress-strain curve and display the test results through the computer (or a paper report on print out the printer), and the test process can be reproduced by the load -strain curve, and clearly reflect the value of each test segment, which is convenient for calculating the items required for the test.
TheRubber Tensile Testing Machine manufactured by Wuhan Guoliang Instrument is equipped with special jigs and large deformation jigs for rubber tensile testing, and has built-in computer interface and printer interface, can output test report through computer and printer. The test accuracy reaches the national standard of 0.5, and the performance is stable and reliable.