[ISO] ISO 180 - Plastics - Determination of Izod impact strength
Writer : 관리자(salt@light-salt.kr) Date : 21.06.22 Hit : 968
Tags : ASTM D256,ISO 180,Izod impact test,plastic
Attachments :
Izod Impact Test
ASTM D256 - Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
ISO 180 - Plastics - Determination of Izod impact strength
Standard
This standard covers the test methods for pendulum type impact testing on plastic specimen. The impact test helps determine the plastics brittleness/ductility by concentrating the impact to a notch on the specimen which produces a standardized and controlled weak point in the specimen. The impact resistance or energy obsorption (energy loss of pendulum swing) is measured by the change in hammers swing angle.
ISO 180: Table 1
ASTM D256: 63.5 x 12.7 x 3~12.7mm / 2.5" x .5" x 0.118~0.5" (J/m or ft-lb/in.)
ISO 180: 80 x 10 x 4mm (kJ/m2)
The results are expressed in energy lost per unit of thickness (such as ft·lb/in or J/cm) at the notch. Alternatively, the results may be reported as energy lost per unit cross-sectional area at the notch (J/m2 or ft·lb/in2). In Europe, ISO 180 methods are used and results are based only on the cross-sectional area at the notch (J/m2). The dimensions of a standard specimen for ASTM D256 are 63.5 × 12.7 × 3.2 mm (2.5 × 0.5 × 0.125 in). The most common specimen thickness is 3.2 mm (0.13 in), but the width can vary between 3.0 and 12.7 mm (0.12 and 0.50 in).
(Source: Wikipedia https://en.wikipedia.org/wiki/Izod_impact_strength_test#ASTM_test_for_plastics)
Test Apparatus
In ASTM D256 Section 5.Apparatus the standard goes into detail of the machines and parts used for testing and measurement. The pendulum, striker, vice, bearings, height, velocity of striker etc. all noted.