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Communication Dans Un Congrès Key Engineering Materials Année : 2011

Anisotropic plastic deformation and damage in commercial Al 2198 T8 sheet metal

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1
D. Steglich
  • Fonction : Auteur
H. Wafai
  • Fonction : Auteur
Jacques Besson

Résumé

Deformation anisotropy of sheet aluminium alloy 2198 (Al-Cu-Li) has been investigated by means of mechanical testing of notched specimens and Kahn-type fracture specimens, loaded in the rolling direction (L) or in the transverse direction (T). Contributions to failure are identified as growth of initial voids accompanied by a significant nucleation of a second population of cavities and transgranular failure. A model based on the Gurson-Tvergaard-Needleman (GTN) approach of porous metal plasticity incorporating isotropic voids, direction-dependent void growth, void nucleation at a second population of inclusions and triaxiality-dependent void coalescence has been used to predict the mechanical response of test samples. The model has been successfully used to describe and predict the direction-dependent deformation behaviour, crack propagation and, in particular, toughness anisotropy.

Dates et versions

hal-00602840 , version 1 (23-06-2011)

Identifiants

Citer

D. Steglich, H. Wafai, Jacques Besson. Anisotropic plastic deformation and damage in commercial Al 2198 T8 sheet metal. Advances in fracture and damage mechanics IX, Sep 2010, Nagasaki, Japan. pp.97-100, ⟨10.4028/www.scientific.net/KEM.452-453.97⟩. ⟨hal-00602840⟩
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