Some simple understanding of universal testing machines

Due to the low price, simple operation and large tonnage of general hydraulic universal testing machines, this type of testing machine can generally be used when conducting structural component tests or simple material performance tests. Such as the destructive test of various building structural components, or the single performance indicators used to test certain materials (such as the tensile strength of steel bars, etc.). Electro-hydraulic servo universal testing machine has three control modes, so it has better performance. However, due to its inherent disadvantages of small stroke and low speed, it is generally not suitable for rubber tests that require high-speed tensile and plastic and polymer material tests with large elongation. When there are many varieties of materials, because the system parameters (P, I, D parameters) need to be adjusted frequently, in order to reduce the requirements for operators, it is not recommended to use such a test machine. It is the choice when constant stress or constant strain test is required, such as cement, building materials samples, and metal samples.

General electronic universal testing machines are currently a type of material testing machines with cost-effectiveness, wide uses and scope of use. This test machine can be used from silicon carbide samples with extremely high requirements for low speed to rubber samples with high performance requirements. This type of test machine can meet the requirements for compression tests with little stroke to special rubber and polymer materials tests with extremely high stroke requirements. Since its unique speed control mode does not require high system stiffness, it is very simple to use and does not require adjustment of system parameters due to changing the test materials. The fixture is flexible and the sensor is expanded. Since its control mode is relatively single, it is not suitable for constant stress and constant strain tests.