High Cycle Resonant Fatigue Testing Machines

Resonant type fatigue testers have tremendous advantages over servohydraulic testing machines in the field of high cycle fatigue testing. They are faster, consume much less power (<500 W) and are maintenance free since they do not require hydraulics or power packs. 

They are separated into a static and a dynamic part so that mean loads other than zero can be applied. These machines can also go through zero and perform tension-compression testing.
They are ideal for testing metallic samples in the plastic region and components such as connecting rods, crankshafts, chains, rebars, turbine blades etc. They are also ideal for fatigue crack growth testing. 
The frequency drop mechanism provides for a method to monitor failure of the specimen that is not possible using a servo hydraulic machine. These machines do not require a COD gauge for pre-cracking CT specimen.
The control system is the latest available and incorporates a Digital Signal Processor at its core. The software is based on Labview and is specifically designed for these machines allowing even relatively inexperienced operators to use the machines with little training.

The Mikrotron

This is a low load capacity machine available in the 5 kN and 20 kN ranges. Its advantages include its versatility, portability and low weight. It is light enough to be placed on a trolley and used.

Technical Specifications
  • Frequency: 40 to 300 Hz
  • Frequency Steps: 5 steps
  • Dynamic Displacement: +/- 4 mm
 

The Testronic

The Testronic is available in the 50 kN to 250 kN ranges. It is light and occupies a floor space of less than 1 sq. m. The frequency is variable in eight steps.

Technical Specifications
  • Frequency: 40 to 300 Hz
  • Frequency Steps: 8 steps
  • Dynamic Displacement: +/- 4 mm
 

The VibroForte

The VibroFOrte operates in the 550 kN and 700 kN ranges. It employs a unique twin dynamic drive system making it considerably light and powerful, while at the same time providing a comfortable working height.

Technical Specifications
  • Frequency: 40 to 300 Hz
  • Frequency Steps: 4
  • Dynamic Displacement: +/- 2 mm
 

 

Cracktronic

 

This is a small machine that is ideal for testing miniature irradiated samples in a hotcell. This machine is used widely in nuclear research establishments to study material characteristics following irradiation. 

                                                                                                                                                                                                                                                                                                                                                                           

Fractomat

This is an indirect potential drop method of crack growth measurement. Foil guges can be pasted to the CT or 3 point bend specimen and connected to the fractomat. This does not require initial calibration.


Fractotron
This COD gauge can work at frequencies upto 120 Hz and upto 90 Hz in compliance mode.
 
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