Tensile-Impact Test and notched Tensile-Impact Test, conventional


The aim of the conventional tensile-impact test according to DIN EN ISO 8256 “Plastics – Determination of Tensile-impact Strength” is to investigate the behaviour of specimens under relatively high impact velocity and to evaluate the toughness respectively the brittleness of films and elastomers.

Principally, the tensile-impact test (unnotched specimens) and the notched tensile-impact test are particular appropriate to investigate such materials for which the unnotched and the notched Charpy impact tests are not suitable because of its mechanical and geometrical properties. Thus, very thin materials, which are made of films or flexible specimens like elastomers can be load by an impact and therefore evaluate its toughness properties under impact conditions.

The tensile-impact test and the notched tensile-impact test are performed with relatively high test speed. This method is appropriate for specimens, prepared from moulded materials, semi-finished products or formed components. With these conventional tests it is furthermore possible to evaluate the mechanical anisotropic behaviour by testing the specimens that are machined from plates or construction components in different directions.

To carry out conventional tensile-impact tests and notched tensile-impact test the specimens are fixed single-sided and on the other side in a cross-head. After releasing the pendulum hammer at the maximum deflection, the specimens in longitudinal direction are loaded until their break. As result of the tests the impact energy Ec and successive the conventional tensile-impact strength atU or the notched tensile-impact strength atN are calculated.

Set-up of a conventional tensile-impact test

Specimen Preparation

  • Punching

Testing Conditions

  • pendulum energies: 2 J – 15 J
  • air conditioning: standard climate (23 °C, 50 % humidity)
  • temperature control (on demand)
  • specimen:
    • Type 1 notched (notch depth double-sided each 2 mm)
    • Type 3 unnotched

Accredited Standards

  • DIN EN ISO 8256:
    Plastics – Determination of Tensile-impact Strength

Contact

Prof. Dr. Katrin Reincke
Telefon: +49 (0)3461 30889-55
katrin.reincke@psm-merseburg.de

Dr. Katja Oßwald
Telefon: +49 (0)3461 30889-72
katja.osswald@psm-merseburg.de

Quickinfo

Results

  • Corrected Impact energy Ec
  • Conventional tensile-impact strength atU
  • Conventional notched tensile-impact strength  atN
  • Anisotropy

Procedures

  • Conventional impact tensile test
  • Conventional notched impact tensile test

Standards

  • DIN EN ISO 8256