Fatigue fracture generally does not exhibit significant plastic deformation, making it difficult to detect and prevent. Therefore, fatigue fracture of components can result in substantial economic and even life losses. The primary objective of fatigue research is to prevent mechanical and structural fatigue failures.

The dynamic torsion fatigue testing machine is mainly used for static torsion strength and dynamic torsion fatigue tests of metal materials, composite materials, and their components. The loading part is driven by a servo torsion actuator, which is rigidly connected to the specimen: the specimen is easy to disassemble and replace. The output end is rigidly fixed. The system features protection functions such as overload and specimen fracture.

I. Technical Parameters:

1. Model: NJ-2000

2. Maximum Dynamic Test Torque: ±2000Nm

3. Static Torque Indication Error: ≤±0.5%

4. Dynamic Torque Indication Error: ≤±1.0%

5. Angle Control Error: ≤±0.5%

6. Test Frequency Range: 0.1～50Hz

7. Test Waveforms: Triangular wave, square wave, ramp wave, and customizable combined waves available

8. Control System: Fully digital hydraulic servo controller

9. Control Method: Torque and angle fully digital PID closed-loop control, with smooth and disturbance-free switching of control modes

10. Torsion Angle Range: ±45°

11. Adjustable Test Space: 0～1000mm

12. Hydraulic Source: Pressure 21MPa, Flow 63L/min

13. Main Unit Dimensions (L x W x H): 2000x600x920mm

14. Control Cabinet Dimensions (L x W x H): 600x600x1600mm

15. Hydraulic Pump Station Dimensions (L x W x H): 1300x900x1250mm

II. Safety Protection:

Equipped with overcurrent protection, grounding protection, overheating protection, etc.; the testing machine features angle limit protection; automatic protection when exceeding 10% of the maximum torque; separately configured remote and local manual emergency stop devices to quickly cut off power in emergency situations.

This testing system uses an imported servo torsion actuator for torsion loading. The equipment adopts a horizontal box-type design, conforming to ergonomic principles with an appropriate height for convenient operation. The fixed chuck moves easily along the linear guide with the slide system, featuring an aesthetically pleasing appearance, reliable performance, and simple operation.