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influence cumulée des paramètres de surface - Bibliothèque Ecole ...

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-69--<br />

CONTRAINTE<br />

NIP a<br />

800<br />

700<br />

t<br />

600<br />

500<br />

.<br />

400<br />

i<br />

iø<br />

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o5<br />

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I<br />

Ib6 I<br />

I<br />

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I I I I th I I<br />

¡ I I I I<br />

j8<br />

Figure 33 : courbe <strong>de</strong> Wähler<br />

NOMBRE DE CYCLES A RUPTURE<br />

Nuance : 56 SC 7<br />

[tat <strong>de</strong> <strong>surface</strong><br />

brut <strong>de</strong> touage<br />

i<br />

décarburée<br />

2 non décarburée

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