What is the effect of the tensile speed of the rubber tensile machine on the test results?

What is the effect of the tensile speed of the rubber tensile machine on the test results?

The rubber tensile machine is a precision testing instrument for testing the mechanical properties, process properties, internal defects, tensile tests, compression and bending of non-metallic materials such as rubber, plastics, textiles and waterproof materials under various conditions and environments. What is the effect of the tensile speed of the rubber tensile machine on the test results? The following is a small series for you to answer.

The rubber tension machine is a viscoelastic material, and the stress relaxation process is closely linked to the deformation speed. When the tensile speed decreases, the tensile strength decreases and the elongation at break increases. When the tensile speed increases, the plastic exhibits brittleness, tensile strength increases, and elongation at break decreases. Therefore, the tensile test must be carried out in strict accordance with the rate specified by the standard test method. The tensile speed of the rubber tensile machine mainly affects the tensile speed, the elongation after fracture and the yield strength. The effect of the tensile speed tester varies from material to material. Otherwise it will affect the accuracy of the test results.

1. Tensile strength: The tensile strength increases with the test speed. However, after reaching a certain stage, the steady yield strength and the tensile strength tend to be larger, and the test speed is faster.

2. Yield strength: When the test speed is slow, the difference between the yield strength and the tensile strength gradually decreases, and the elongation decreases after the break at a certain stage. In addition, the large plastic tensile strength and elongation after fracture are sensitive to the tensile speed.

3. Elongation after break: The increase in tensile speed reduces the elongation after fracture. After a certain period of time, the elongation decreases after the break. In addition, the large plastic tensile strength and the post-break elongation are sensitive to the tensile speed, while the small plastic tensile strength and the post-break elongation are relatively less sensitive to the stretching speed.

The rubber tension machine produced by Jiangsu Tianhui is a door structure with a novel appearance. Computer digital speed control system, equipped with force sensor and extension automatic tracking device, with good stability. The data acquisition, storage and processing of the microcomputer and the interface circuit board can calculate the basic physical performance parameters of some materials such as zui force, yield strength, average peel force, and large deformation of Zui. During the test, the microcomputer collects the force value and deformation signal in real time, and the software displays the “force value-displacement” curve. After the test is finished, the calculation is automatically performed, the parameters are saved, and the bottom report form required by the user can be printed out.

Jiangsu Tianhui's rally machines are used in research institutes, commodity inspection and arbitration institutions, universities and other institutions as well as rubber, tires, plastics, wire and cable, footwear, leather, textile, packaging, building materials, petrochemical, aviation and other industries. It is an indispensable testing equipment for material development, physical property testing, teaching research, quality control, feed inspection, random inspection of production lines, and tensile machine fixtures as an important part of the instrument. Different materials require different fixtures, and also test energy. Whether it is smooth and an important factor in the accuracy of the test results.