ASTM D1822 Tensile-Impact Energy test

Scope:

Tensile-Impact Energy test by ASTM D1822 calculates the energy needed to break samples of plastic or electrically insulating material by a pendulum, under a high-speed tensile load at stated conditions. This test is useful for rigid, very thin, and flexible materials. A similar test method is ISO 8256. 

Test Procedure:

For the Tensile-Impact Energy test by ASTM D1822, the width and the thickness of the test sample are noted. The sample is then clamped and placed into the pendulum machine under stated conditions. The pendulum is released and allowed to strike the anvil that breaks the sample. The tensile impact energy is noted and the corrected impact energy is determined. 

Sample size:

Two types of test samples are used for the Tensile-Impact Energy test by ASTM D1822: long (L) and short (S). Both samples are 63.5 mm (2.5 inches) long but the gauge length areas vary. The L-type sample has a gauge length of 9.53 mm (0.375 inches) that provides greater differentiation between materials. The S-type sample has no true gauge length and it provides a greater occurrence of brittle rupture. 

Data:

For ASTM D1822, the tensile impact energy is noted from the apparatus. Corrected tensile impact energy is determined as the scale reading of the difference of energy and the friction correction with the addition of the bounce correction factor. The measurements are given in ft-lbs/in².

Conclusion:

Tensile-Impact Energy test by ASTM D1822 calculates the energy needed to break samples of plastic or electrically insulating material by a pendulum, under a high-speed tensile load at stated conditions.