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Elongation at break

also known as fracture strain, is the ratio between changed length and initial length after breakage of the test specimen. It expresses the capability of a material to resist changes of shape without crack formation.

Pronunciation
/iˌlɔŋˈɡeɪʃən æt breɪk/
/iːlɒŋˈɡeɪʃən ɑːt breɪk/