Equipment Description:

The main unit of this series of testing machines adopts a high stiffness frame, seamless structure design, hydraulic lifting adjustment space for the crossbeam, precision guided actuators, and intelligent testing softwareTestLiveEnsure complete and accurate test results. The testing machine adopts fatigue level load sensors with acceleration compensation function and non-contact displacement sensors for position measurement, which have the characteristics of high measurement accuracy and good stability. Adopting a fully digital measurement and control system to achieve closed-loop control of force, displacement, and deformation.

Advanced hydraulic servo drive technology is used for loading, high-precision dynamic load sensors, and high-resolution magnetostrictive displacement sensors to measure the force and displacement of the specimen. The hydraulic system adopts adaptive variable technology to significantly reduce the system's working flow rate, reduce noise, lower hydraulic system heating, and extend the service life of system components.

This series of testing machines adopts dynamic response adaptive control technology, which can automatically adjust the dynamic response of the testing system to an appropriate state according to the changes in sample stiffness during the testing process. The development of this new technology has brought convenience and benefits to materials science research, providing stable and accurate control for experimental studies on low cycle fatigue, fatigue crack propagation, and significant changes in specimen stiffness. It has also provided favorable experimental conditions for testing various complex mechanical behaviors.

The fatigue testing machine is mainly used for tensile and compressive fatigue testing, fracture toughness testing, fatigue crack propagation testing, low cycle fatigue testing, three-point bending fatigue testing of metal materials and their components, rubber or rubber elastic elements, shock absorbers, dampers, etc. under waveform states such as sine waves, triangular waves, square waves, trapezoidal waves, and oblique wavesCTExperiments, dynamic stiffness tests, etc. This series of testing machines can also be equipped with high and low temperature environmental chambers and corrosive medium environmental devices for fatigue performance testing of materials in such environments.

Functional features:

L adopts“CPU + DSP”Dual core control, bus slot architecture, easy expansion, excellent dynamic performance.

I communicate with computers through Ethernet ports（RJ45）High data transmission rate enables real-time processing of software data.

The high-speed sensor data acquisition card ensures high-speed response of dynamic control and accurate data sampling.

Closed loop control of displacement, load, and deformation, achieving smooth control switching between them.

Built in function generator to control sine wave, triangular wave, trapezoidal wave, oblique wave, etc.

Synchronous sampling and measurement of each measurement channel ensures more accurate experimental results.

Closed loop control is fast and high-frequency, achieving complete dynamic control characteristics.

Control mode: force, displacement, deformationPIDClosed loop control, and can achieve smooth and disturbance free switching of any control mode.

The electrical design meets the requirementsEMCSafety standard requirements.

The stable sampling and control frequency ensures the accuracy of data and control.

L has limit protection and full-scale overload protection functions.

Adopting force measurement technology. The equipment adopts a fatigue level load sensor with acceleration compensation, which can automatically compensate for the influence of inertial force on force measurement.

Dynamic response adaptive control technology, which achieves automatic setting at the beginning of the experimentPIDValue, and automatically track and update continuously during the experimental processPIDValue. When there is a significant change in the stiffness of the sample, the dynamic response of the system will automatically adjust to the appropriate state. This provides stable and precise control for experimental research on low cycle fatigue, fatigue crack propagation, and significant changes in stiffness of various specimens.

The control system adopts high-resolution feedback sampling and signal conditioning technology, and all channels (displacement, load, strain) are5kHzContinuous and synchronous data collection and feedback are carried out at a certain rate. This effectively ensures the system accuracy of the entire machine.

The fully digital control electro-hydraulic servo fatigue testing machine has ultra-high measurement accuracy. The accuracy of load measurement is the full range of the load sensor±0.005%Or indicative value±0.5%(Take the larger value). The accuracy of strain measurement is within the full range of the extensometer±0.005%Or indicative value±0.25%Precision of extensometer (take the larger value). Control channel conversion accuracy is0.003%The system resolution of the whole machine is as high as19Position (far superior)16Bit resolution)

It has the function of automatically identifying load sensors and strain gauges.

Set limit protection and constant amplitude control for each channel;

Through computers andBairoe TestLiveThe experimental software package can perform static tests and high/Low cycle fatigue, crack propagation rate, program block fatigueS-NCurve, random fatigue, fracture mechanics（K_IC、J_IC）Dynamic stiffness, damper power test, etc.