Test Method
The energy necessary to burst and penetrate the center of a specimen, mounted between two plates with a circular aperture, is measured by the loss in mechanical work-capacity due to the expenditure of kinetic energy by a pendulum, the rounded probe of which passes through the test specimen.
Corrections for “toss factor” or kinetic energy imparted to the puncture fragment of the test specimen are not made, as only tiny masses are involved. The pendulum head hits the specimen with a maximum velocity of about 74 m/min and a maximum energy of about 5 J (50 cm-kgf).
Precautions
Obtain samples that are of uniform thickness and consistency, flat, free of defects, and representative of the material to be tested.
In either procedure, be sure that the hands are kept out of the pendulum path when it is in the cocked position,
Standard
ASTM D3420 Standard Test Method for Pendulum Impact Resistance of Plastic Film
Pendulum Impact
Like other techniques to measure toughness, this test method provides a means to determine parameters of a material at strain rates closer to some end-use applications than provided by low-speed uniaxial tensile tests.
PIT-01 Pendulum Impact Tester is to measure the energy to burst and penetrate the center of a specimen, which is determined by loss in mechanical work capacity due to the expenditure of kinetic energy by a pendulum.
The test gives a quantitative measurement of impact resistance properties of pendulum of films, sheets, composites, foils, paper and other materials.
Impact resistance plays an important role in the performance of material subjected to regular shocking load or impact load. As this kind of load may cause rupture, cracking or deformation.
There are various test procedures to evaluate the impact resistance of a material, such as dart impact, ball impact, pendulum impact, izod, charpy, tensile, etc.
