Fluctuating Tensile Tests - MEG 20 TT

The MEG 20 TT is a Very High Cycle Fatigue (VHCF) testing machine designed for fully reversed (load ratio R=-1) and tensile-tensile tests (0<R<1). It allows mechanical characterization of materials in gigacycle regime.

The MEG 20 TT machine is comprising of a testing frame and a separate control cabinet called “Grey Box”.

The testing frame can be placed on a table, or on a sturdy welded-construction pedestal. It has a built-in ultrasonic generator, which allows the specimen to be loaded at a frequency of 20kHz.

One billion cycles is reached in 14 hours only, reducing the necessary time to get Wöhler’s curve. And of course the occupation time of the machine, improving drastically the return on investment (ROI)!


Technical characteristics and performances:

  • Load ratio: R=-1 (fully reversed tests)
  • Load ratio: 0<R<1 (tensile-tensile tests)
  • Loading frequency: 20kHz
  • Amplitude of excitation: 3µm up to 160µm
  • Control and acquisition with dedicated software
  • Automatic stop when specimen breaks
  • Fatigue tests in economically viable time: 109 cycles in less than 14 hours
  • Installation within 15min on conventional systems
  • No maintenance
  • Specimen dimensioning tool without finite element calculations


Other 3R VHCF tests expertise:

  • Torsion tests
  • 3 & 4-point bending tests
  • Fatigue crack propagation tests under mode I loading
  • Disc bending tests
  • Tests in aqueous environments
  • Temperature-controlled tests


3R support:

  • Training on ultrasonic VHCF
  • Technical support
  • Pre-study on request