Characterization and Identification of 5083 Aluminum Alloy Behavior: Experimental and Numerical Investigations

The development of sheet metal forming products and processes has been mostly influenced by new tools, such as the vast field of numerical investigations based on finite element simulations. Numerical modeling of the material behavior during the forming process is necessary for the quality of the measured results. The characterization and identification of the investigated material data and their transformation into numerical material models are of great importance, especially for the anisotropic sheet metals. In fact, the stress triaxiality, which is determined as the ratio between the average stress and the equivalent stress, presents a crucial parameter in the prediction of ductile damage. In this study, notched specimens with various notch radius are investigated experimentally to capture the ductile fracture of 5083 aluminum alloy, to control their stress triaxiality and to estimate Hooputra’s criterion parameters related the fracture plastic strain with the triaxiality. A VUMAT subroutine containing the numerical material modeling is adopted with Abaqus/Explicit to validate the experimental measurements and a good agreement is obtained, which proves the interest of the suggested model. A numerical study illustrates a valuable guide to predict 5083 aluminum sheet’s behavior deformed by a Single point incremental forming (SPIF) process.