Page 22 - POLYMER TECHNOLOGY
P. 22
Figure 2.4: Charpy Impact Test
To conduct the experiment, the pendulum arm is set at a particular position
correspondent to an energy setting. The arm is released and its hammer end is allowed
to hit the centre of the specimen. The impact strength of the material is determined
by the amount of energy needed to break or fracture the specimen.
Izod impact test
The Izod impact test is similar to the Charpy test where it is also uses a hammer
attached to a pendulum arm to hit a custom-made specimen bar and measure the
energy needed to fracture it.
The main difference between the Izod test and the Charpy test is the orientation of
the specimen in the measuring equipment. While the specimen is set horizontally in
the Charpy impact test, the Izod test examines a vertically positioned sample with a
V-Notch. The pendulum hammer is made to strike the upper tip of the notched
specimen.
Figure 2.5: Izod Impact Test
18 | P a g e
