Material characterization and failure analysis

 

In our testing laboratory we can conduct comprehensive investigations into polymer materials along the entire processing chain from the raw material to the finished component. In cases of damage or failure, we offer our project partners and customers a systematic analysis of possible causes and sources of damage.

 

Tensile Test according to ISO 527-1/2
© Fraunhofer ICT

Tensile Test according to ISO 527-1/2

Sample manufacture

Test results can only be used to compare different materials when the sample production and the preparation of the materials are identical. The following standardized manufacturing methods are available in our pilot plants and laboratories:

  • Injection molding technology for thermoplastics and free flowing thermosets
  • Manufacture of sheet material for the production of test samples through compression molding (e.g. RTM)
  • Mechanical separation processes for composite sheet materials and hot wire cutting for foams
  • Conditioning of samples in climate chambers
Injection molding machine, 1.200 kN
© Fraunhofer ICT

Injection molding machine, 1.200 kN

Mechanical testing

4-Point-Bending Test of thermoplastic foam sandwich part
© Fraunhofer ICT

4-Point-Bending Test of thermoplastic foam sandwich part

  • Tensile test with measurement of lateral contraction (for example according to DIN EN ISO 527)
  • 3- and 4-point bending test (for example according to DIN EN ISO 14125)
  • Testing of the interlaminar shear strength (for example ILSS according to DIN EN ISO 14130, shear-edge test etc.)
  • Compression test, e.g. for fiber composites or foams
  • Impact strength/ notched impact strength according to DIN EN ISO 179
  • Heat deflection temperature HDT according to DIN EN ISO 75
  • Vicat softening point according to DIN EN ISO 306

Rheological and complementary testing for plastics

  • Shear viscosity of polymer melts (high-pressure capillary viscometer), for example according to DIN 53014
  • Extensional viscosity of polymer melts (Rheotens®), for example according to ISO 16790
  • Melt index test according to DIN EN ISO 1133
  • Measurement of fiber content and fiber length
  • Determination of the moisture content
  • Shore hardness (Shore A and Shore D)
  • Density measurement (immersion method)
  • Color measurement
  • Weathering (Xeno test)
  • Contact angle measurement/ Determination of interfacial energy
Determination of strain-viscosity, Rheotens-Device
© Fraunhofer ICT

Determination of strain-viscosity, Rheotens-Device

Microscopy and preparation methods

Microscopy PA Crystallisation
© Fraunhofer ICT

Microscopy PA Crystallisation

We have comprehensive know-how in the preparation and microscopy of polymer samples, including:

  • Crystallinity of polymers
  • Visualization of cavities / pores, fiber impregnation
  • Fiber and particle distribution in polymers
  • Morphology of polymer blends
  • Layer thickness measurement of surface coatings
  • Polymer adhesion, for example to glass fibers