%0 journal article %@ 0252-1059 %A Steglich, D., Wafai, H., Besson, J. %D 2011 %J Key Engineering Materials, Advances in Fracture and Damage Mechanics IX %P 97-100 %R doi:10.4028/www.scientific.net/KEM.452-453.97 %T Anisotropic plastic Deformation and Damage in commercial Al 2198 T8 Sheet Metal %U https://doi.org/10.4028/www.scientific.net/KEM.452-453.97 %X 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.