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Probabilistic thermal-mechanical fatigue criterion for lost foam casting aluminium alloys based on 2D/3D porosities distribution

type de publication      communication internationale avec actes publiés
date de publication 2014
auteur(s) Szmytka Fabien; Limodin Nathalie; Wang Long; Osmond Pierre; Adrien Jérôme; Charkaluk Eric; Buffière Jean-Yves
numéro de papier 05005
  
conférence 2nd International Symposium on fatigue Design & Material Defects, FDMD II
     dates de 11-06-2014 à 13-06-2014
     lieu Paris, France
     nom des actes FDMD II - JIP 2014 - Fatigue Design & Material Defects
  
résumé A thermal-mechanical fatigue criterion is proposed to assess the lifetime of aluminium alloys produced by a lost foam casting process. It is based on the observed size distribution of pores sizes which are considered as critical zones for cracks initiation and gives reliable results when both pores sizes are identified from X-ray tomography and mean stresses are taken into account. Lifetime probabilities are finally successfully compared with experimental results.
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