Investigation of Mechanical Characteristics

Technology and analytical facilities

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Testing machine Zwick 1476 with furnace

 

Universal testing machine Zwick 1476 (year of manufacture 1993, modernization 2010)

  • Tensile testing at room temperature (DIN EN ISO 6892-1)
  • Tensile testing up to 1000 °C in air (DIN EN ISO 6892-2)
  • Individual testing with freely programmable process (load, elongation, temperature)
  • 4 load cells for maximal forces of 200 N, 1 kN, 10 kN and 100 kN (annually calibrated)
  • Measurement of elongation with videoextensometer (Limess, RtSS, annually calibrated) or traverse (annually calibrated, with deformation correction)
  • Analysis of local deformations with software Vic 2D

 

© Fraunhofer IFAM Dresden

Testing machine Zwick 1488

High temperature testing machine Zwick 1488 (year of manufacture 1996)

  • Tensile testing up to 1500 °C in inert atmosphere (Ar, vacuum) on the basis of DIN EN ISO 6892-2
  • Individual testing with freely programmable process (load, elongation, temperature)
  • Load cell for maximal force of 10 kN (annually calibrated)
  • Measurement of elongation with extensometer for high temperatures MAYTEC PMA-13/2/V5 (annually calibrated) or traverse (annually calibrated, with deformation correction)
© Fraunhofer IFAM Dresden

Testing machine inspectTable 100

inspectTable 100 (Hegewald und Peschke) (year of manufacture 2009)

  • Compression testing at room temperature on the basis of DIN 50106 (dense materials) and DIN 50134 (cellular materials)
  • 3- and 4-point bending tests on the basis of DIN EN 843-1 with distances between supports from 20 mm to 300 mm
  • Individual testing with freely programmable process (load, elongation)
  • 2 load cells for maximal forces of 5 kN and 100 kN (annually calibrated)
  • Measurement of elongation with videoextensometer (Limess, RtSS, annually calibrated) or traverse (annually calibrated, with deformation correction)
  • Analysis of local deformations with software Vic 2D
© Fraunhofer IFAM Dresden

Resonance frequency damping analysis of a hollow sphere structure

© Fraunhofer IFAM Dresden

Flexural vibration

© Fraunhofer IFAM Dresden

Torsional vibration

RFDA System 23, version 6.3.0. of IMCE (year of manufacture 2006)

Testing procedure

  • Non-destructive testing method
  • Measurement of resonance frequency and its decay after short mechanical input
  • Determination of Youngs and shear modulus, Poisson ratio and damping without micro plasticity
  • Appropriate for dense and cellular materials


Damping und Youngs modulus

  • Rectangular block specimen : length ≠ width  ≠ high
  • 30mm ≤ length ≤ 200 mm
  • length ≥ 2 × width
  • lateral faces rectangular and smooth (dense materials: milled or ground)  

Shear modulus and Poisson ratio

  • similar to flexural testing, additional:
  • 60 mm ≤ length ≤ 200 mm
  • 30 mm ≤ width ≤ 100 mm
  • height ≤ 0,5 × width  

Best results can be reached for specimen which have a geometry in the middle of the tolerance like 100×50×7 mm³. Different geometries may be possible.