The high-frequency fatigue testing machine is mainly used to measure the fatigue life of materials and components, and conduct high-frequency tensile and compression tests on metal materials and components, as well as fatigue performance and fracture mechanical performance tests under tension-compression alternating load. Equipped with corresponding fixtures, it can also carry out fatigue tests such as three-point and four-point bending, compact tension, plate specimen tension, gear, bolt, connecting rod, chain, etc., as well as microscopic observation method crack growth rate and program-controlled loading.
Main functions:
High cycle fatigue, low cycle fatigue, fatigue crack growth, fracture toughness (KIC, JIC), cyclic loading and unloading, high and low temperature tension and compression, three-point bending, four-point bending.
Many scenarios of material application involve the external environmental conditions of periodic loading, the most common of which is periodic load impact or repeated deformation. In view of the research on the application process and results of such repetitive mechanical elements, the traditional test methods, whether using the low-frequency dynamic loading mode driven by the lead screw mechanism or the high-frequency dynamic loading mode realized by the hydraulic servo valve, have unavoidable natural defects in accuracy, reliability and maintainability, resulting in the inability to achieve some applications due to insufficient accuracy/performance, Or high and unbearable maintenance costs (personnel, consumable parts, energy consumption, etc.).
The high-frequency fatigue testing machine has the following obvious advantages in technology:
1. High rigidity: the main engine is designed with TPHS gapless heavy frame structure, ensuring small deformation of high rigidity and small error of repeated test results.
2. Intelligent air gap structure: intelligent air gap structure is adopted, which eliminates the need for manual voltage shift, making it easier to start vibration and more convenient to use.
3. Large space: the upper vibration structure design, the test space is larger, and the sample clamping is more convenient.
4. Coaxiality: excellent alignment and coaxiality, ensuring the minimum impact of lateral force under load.
5. Digital intelligent control: full-digital pulse width modulator template, full-isolated IGBT switch-type amplifier unit, and intelligent force-measuring amplifier template.
6. Close-loop control: the average load control system adopts ACservo electromechanical servo system closed-loop control. There are two kinds of control methods for closed-loop control and automatic compensation of alternating load: conventional fatigue test (axial tension and compression symmetry, asymmetry and single pulse test) and program-controlled loading test.
7. Operation mode: the operation and setting are realized by the virtual panel generated by the system software. All control is directly managed and controlled by the computer.
8. Real-time display: experimental waveform, current value, pulse value.
