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IMPETUS - test methods

There are many different test methods available to get the necessary material data in dependence of the complexity of the material card. The characterization pyramid for IMPETUS™ should give an idea from the basic characterization up to the final component validation.


Characterization pyramid

Measurement results in dependence of the test type:

Fibermap 2

Free 3-point-bending test

  • standard test (most commonly loading case in reality)
  • easy availability of test specimens (typical geometry: 50 x 10 x 2 mm)
  • the results as base of the material card are more accurate than using just tensile tests (as most of the plastics show a tension/compression dependency)
  • velocity of the pendulum: 1 - 4.4 m/s
  • support distance: 30 - 60 mm

Dynamic tension bending test

  • analogue to the free 3-point-bending test (test specimen is clamped)
  • used to capture failure in uniaxial behavior
  • used to determine the tension/compression-dependency of the material
  • easy availability of test specimens (typical geometry: 80 x 10 x 2 mm)
  • velocity of the pendulum: 1 - 4.4 m/s
  • support distance: 40 - 50 mm

Compression test

  • for foams
  • change of impact energy by variation of velocities and mass
  • test specimen geometry: cube with edge length of 25 mm
  • velocity of the pendulum: 1 - 4.4 m/s

Puncture test

  • loosely based on DIN EN ISO 6603-2
  • biaxial with a triaxiality of 0.66
  • test procedure analogue to the free 3-point-bending test
  • used to capture failure in biaxial behavior
  • typical geometry: 80 x 80 x 2 mm
  • velocity of the pendulum: 1 - 4.4 m/s
  • diameter of impactor: 10 mm, 15 mm, 20 mm or 25 mm
  • support distance: 42 mm

Free bending T-specimen

  • plate with a rib (typical for injection molded parts)
  • test procedure analogue to the free 3-point-bending test
  • used for validation of material card
  • used for investigation of failure under tension load
  • velocity of the pendulum: 1 - 4.4 m/s
  • support distance: 30 - 60 mm

Component test

  • complete components: wire harness, XX-rib, …
  • free 3-point-bending test / compression test
  • used for validation of material card
  • velocity of the pendulum: 1 - 4.4 m/s