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Cours-Proprietes-mecaniques-des-materiaux

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R m<br />

σ<br />

0 2<br />

Exploitation de la courbe σσσσ−−−−εεεε<br />

Domaine<br />

plastique<br />

A<br />

ε n<br />

(%)<br />

Résistance à la traction R m<br />

contrainte maximale atteinte durant<br />

l ’essai de traction<br />

Allongement A<br />

allongement à la rupture<br />

A = (L f - L 0 )/L 0 = ΔL / L 0<br />

Striction z<br />

variation de section à l’endroit<br />

où la rupture s’est produite<br />

z = (S 0 - Sf ) / S 0

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