International Organization for Standardization

Plastics — Determination of Charpy impact properties — Part 2: Instrumented impact test AMENDMENT 1: Precision data - First Edition
 N 179-2 AMD 1

Annotation

This part of ISO 179 specifies a method for determining Charpy impact properties of plastics from force-deflection diagrams. Different types of rod-shaped test specimen and test configuration, as well as test parameters depending on the type of material, the type of test specimen and the type of notch are defined in part 1 of ISO 179.

Dynamic effects such as load-celllstriker resonance, test specimen resonance and initial-contact/ineria peaks are described (see figure 1, curve b, and annex A).

For the comparison between Charpy and Izod test methods, see ISO 179-1, clause 1.

ISO 179-1 is suitable for characterizing the impact behaviour by the impact strength only and for using apparatus whose potential energy is matched approximately to the particular energy to break to be measured (see ISO 13802, annex C). This part of ISO 179 is used if a force-deflection or force-time diagram is necessary for detailed characterization of the impact behaviour, and for developing automatic apparatus, .e. avoiding the need, mentioned above, to match energy.

For the range of materials which may be tested by this method, see ISO 179-1, clause 1.

For the general comparability of test results, see ISO 179-1, clause 1.

The method may not be used as a source of data for design calculations on components. However, the possible use of data is not the subject of this part of ISO 179. Any application of data obtained using this part of ISO 179 should be specified by a referring standard or agreed upon by the interested parties.