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Conception Mécanique II

Conception Mécanique II. Exercice 13 Construction de la loi courbe de Wöhler pour un acier. Exercice 13 : construction de la courbe de Wöhler pour un acier.

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Conception Mécanique II

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  1. Conception Mécanique II Exercice 13 Construction de la loi courbe de Wöhler pour un acier Conception mécanique II 2007

  2. Exercice 13: construction de la courbe de Wöhler pour un acier • L’acier AISI 1045 (C45, GS Ck45, UNS G10450) a une contrainte de rupture minimum Rmde 655 MPa et une limite élastique R0.2de 510 MPa. On vous demande d’estimer • a) la limite d’endurance en flexion rotative • b) la resistance à la fatigue pour une durée de vie de 10’000 cycles • c) la durée de vie pour une contrainte alternée de 380 MPa Conception mécanique II 2007

  3. Exercice 13: construction de la courbe de Wöhler pour un acier Conception mécanique II 2007

  4. sa (log) Rm= 655 MPa 0.9 Rm= 590 MPa S103 S104 380 0.5 Rm= SNE = 328 MPa SNE NNE=106 103 N (log) 104 N380 Exercice 13: construction de la courbe de Wöhler pour un acier Conception mécanique II 2007

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