Tensile Deformation and Cracking Sequence of Foamed AlSi10 with Skin

H. P. Degischer , A. Kottar , B. Foroughi , E. Maire (1) , Nathalie Godin (1) , V. Carmona , Stéphanie Deschanel (1) , F. Simancik

1 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

28 mm thick panels of cellular AlSi10 were produced by powder compact foaming. Tensile specimens machined from these panels are tested with the original skin on both sides of the samples. The density distribution determined by medical X-ray tomography is transformed into domains of constant densities. The tensile straining of that multiphase continuum is simulated using the finite difference method. The input data for the stiffness and strain hardening are scaled to the domains' densities for the skin and the core of the panel. The stiffness increases slightly with initial straining. Crack initiation is recorded by acoustic emission, while strain hardening continues until complete fracture of a skin. The sequence of crack growth is predicted by the simulation.

Domaines: Matériaux

H. P. Degischer, A. Kottar, B. Foroughi, E. Maire, Nathalie Godin, et al.. Tensile Deformation and Cracking Sequence of Foamed AlSi10 with Skin. POROUS METALS AND METALLIC FOAMS: METFOAM 2007, 2008, 439 DUKE STREET, LANCASTER, PA 17602-4967 USA, Unknown Region. pp.39+. ⟨hal-01822689⟩