Fatigue test

Fatigue test is carried out by different types of machines:

TEC Eurolab is equipped with a machine for the execution of fatigue tests in resonance that allows testing at high frequencies (100-130Hz) exploiting the resonance of the system tested, in reduced times and high loads.
Vibrophore applications:
  • Fatigue tests Push and Pull, exploiting the resonance frequency of the sample tested (metallic component, and not threaded) to test the properties of fatigue resistance.
  • Fatigue tests on composite materials and polymer disks.
  • Evidence of fracture mechanics
  • Evidence of the oil & gas type COD and CTOD

Areas of application:
  • Aviation: fasteners
  • Automotive industry: fasteners, rods, chains, etc. ..
  • Oil & Gas
  • R & D: Low Cycle Fatigue Testing of metallic materials, composites and carbon fiber

To cover the range of tests at low loads, TEC Eurolab also has a pneumatic machine. This equipment, opposite to vibrophore is particularly suitable for the execution of tests on plastic components, composites and light metals.
The fatigue test is performed when you want to characterize the behavior of a material subjected to voltages below the critical ones, verifying the useful life under a defined load profile, oscillating between a maximum value and a minimum value set.

The test procedure consists of applying to the sample a load cycle defined , separately according to the type of stress tests to traction - compression , static bending , rotating bending and alternating torque .
This cycle imposed is defined in terms of maximum load and minimum load or amplitude.

The fatigue test can be conducted on both standard test pieces that samples .
In the first case , the test is used to determine the behavior and the length of material in a certain state of delivery subjected to fatigue cycles set . Based on the experimental results obtained it is possible to reconstruct the Wohler curves or the Goodman diagram -Smith of the material itself , determining , where it exists, the fatigue limit of the material or by determining the effect on the duration of the component under defined loading conditions .
In the second case, is the component that is subjected to the same standard cycles of load , checking duration of the conditions imposed.

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