A fatigue multi‐site cracks model using coalescence, short and long crack growth laws, for anodized aluminum alloys

Abstract : It has been shown that decrease of the fatigue life of aluminium alloys treated with anodization can be explained by the degradation of surface condition due to pickling. In order to predict fatigue life of anodized aluminium alloys, a multi‐site crack growth model is developed by considering the pickling pits sites as initial flaws from which fatigue cracks develop. A map of the pickled surface is built from topography measurement with a contact profilometer. Then the pits are detected and their sizes are defined (depth, length and width). At the beginning of the calculation, a short crack growth law is used for crack having depths less than grain size. Then Paris long crack growth law is used. The coalescence of cracks is considered when their lengths increased by its crack tip plastic zone are large enough to interact with other neighbouring short cracks. The fatigue life is calculated for K‐max achieving 70 % K‐IC.
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01666704
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Wednesday, August 1, 2018 - 11:52:40 AM
Last modification on : Friday, April 12, 2019 - 4:23:19 PM
Document(s) archivé(s) le : Friday, November 2, 2018 - 1:41:18 PM

File

Mabru_3995.pdf
Files produced by the author(s)

Identifiers

Citation

Michel Chaussumier, M. Shahzad, Catherine Mabru, Rémy Chieragatti, Farhad Rezai-Aria. A fatigue multi‐site cracks model using coalescence, short and long crack growth laws, for anodized aluminum alloys. 10th International fatigue congress (FATIGUE 2010), Jun 2010, Prague, Czech Republic. pp.995-1004, ⟨10.1016/j.proeng.2010.03.108⟩. ⟨hal-01666704⟩

Share

Metrics

Record views

75

Files downloads

16