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How to Test Plastic Properties

 

Tensile Impact

Tensile Impact is comparatively new and there is relatively little industry data available to adequately assess its accuracy and utility. However, possible advantages over the notched Izod test are immediately apparent: the notch sensitivity factor is eliminated, and energy is not used in pushing aside the broken portion of the specimen.

The specimen is mounted between a pendulum head and crosshead clamp on the pendulum of an impact tester. The pendulum is released and it swings past a fixed anvil which halts the cross head clamp. The pendulum head continues forward, carrying the forward portion of the ruptured specimen.

The energy loss (tensile impact energy) is recorded, as well as whether the failure appeared to be a brittle or ductile type. ASTM D-1822.

 

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