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Tear Strength - ASTM D624

The force required to tear a specified test specimen divided by the specimen thickness.

This test provides a measure of resistance to tearing. Tear strength may also be used to illustrate the anisotropy of a material.

Testing is performed by pulling specimens apart using a tensile test machine. The maximum force required to tear a test specimen is used to calculate the tear strength of the Die A, B, and C specimens while the mean force is used for the T and CP specimens.

Specimen Name Diagram Grip Separation Test
Die A Nicked Crescent 500 mm/min (20 in/min)
Die B Nicked Tab End 500 mm/min (20 in/min)
Die C Right Angle 500 mm/min (20 in/min)
T Trouser 50 mm/min (2 in/min)
CP Constrained Path 50 mm/min (2 in/min)

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