| Issue |
Rev. Metall.
Volume 108, Number 2, 2011
|
|
|---|---|---|
| Page(s) | 109 - 112 | |
| DOI | https://doi.org/10.1051/metal/2011046 | |
| Published online | 23 September 2011 | |
Numerical damage and life prediction of automotive casting tooling due to low-cycle thermal fatigue*
Prédiction de l’endommagement par fatigue thermique des outillages de fonderie basée sur une approche du type plan critique
1
Toumbas Engineering, 91 rue du Faubourg Saint Honoré,
75008
Paris,
France
e-mail: toumbas@toumbas-engineering.com
2
PSA – Peugeot Citroen, 18 rue des Fauvelles,
92250
La Garenne Colombes,
France
e-mail: dufaure.nicolas@mpsa.com
Received:
17
December
2010
Accepted:
22
June
2011
The economic challenge for PSA regarding the maintenance of their mould foundry park is to predict and improve its lifespan in preventing any risk of initiation and propagation of cracks in thermal fatigue. A method for assessing the number of cycles of casting tooling thermal fatigue used by PSA was developed using the criterion of Fatemi-Socie [A. Fatemi, D. Socie, Fatigue Fract. Engng. Mater. Struct. 11 (1988) 149-165, D.F. Socie, multiaxial fatigue damage models, ASME 109 (1987) 293-298], associated with a shear failure mode, which predicts the thermal fatigue damage by assessing stress and strain tensors on different facets around any material point.
Résumé
Une méthode d’évaluation du nombre de cycles par fatigue thermique des outillages de fonderie utilisés par PSA a été développée en utilisant le critère de Fatemi-Socie, associé à un mode de rupture par cisaillement, qui prédit l’endommagement par fatigue thermique en évaluant les tenseurs des déformations sur différentes facettes autour des points matériels.
Key words: Fatigue / damage / thermal fatigue / critical facets / tooling / molding / number of cycles / failure mode / shear / deformation tensors / multiple cracks / fatigue life prediction / finite elements
Mots clés : Fatigue / endommagement / fatigue thermique / plan critique / outillage / fonderie / nombre de cycles / mode de rupture / cisaillement / durée de vie / tenseurs / déformations / fissuration / éléments-finis
© EDP Sciences, 2011
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