Elongation

Extension produced by a tensile stress. Also, in the physical testing of rubber, the increase in length of a test-piece when stretched, usually expressed as a percentage of the original length; for example a 1″ piece stretched (0 6″ has an elongation of 500%. Elongation at break — the elongation of a test-piece at thc moment of rupture, usually expressed as percentage of the original length.

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