Impact testing

Testing plastic impact resilience

Resilience is a measurement of a material’s fragility, determined by the work needed to dynamically break the sample, compared against a vertical sample profile.
 

The Charpy test method

This method involves resilient bending of a cuboid sample with or without a notch, supported by two props and determination of work needed to break it. The notch is used to concentrate strains at a particular point on the sample under test. Resilience determines the work needed to dynamically break a sample, compared to 1 m2 of vertical sample profile (in the case of resilience with a notch, then against the profile at the notch’s location).
 

Norm

  • PN-EN ISO 179-1:2010
 

The Izod test method

The Izod method differs from the Charpy method in terms of the means of sample mounting, measurements performed and the speed of hammer pendulum impact. The method tests only samples with notches. The sample is mounted vertically, with one end in the hammer base mount and is broken with a cylindrical bladed pendulum at a specified distance from the edge of the mount.
 

Norm

  • PN-EN ISO 180:2004

Metal resilience using the Charpy method

Breaking work: KV2 and KU2 are determined according to PN-EN ISO148-1 using pendulum hammer 450MP2B10153 with the following starting energies of hammer impact: 150 J, 300 J and 450 J. Additionally, we possess an RP 890C heating-cooling thermostat allowing tests at temperatures ranging from -90°C to +200°C to be conducted.
Document No. Title/Description
PN-EN ISO148-1 Metallic materials - Charpy pendulum impact test - Part 1: Test method
PN-EN ISO 179-1:2010 Determination of Charpy impact properties - Part 1: Non-instrumented impact test
PN-EN ISO 180:2004 Plastics - Determination of Izod impact strength