FINITE-ELEMENT SIMULATION OF SHEET-METAL FORMING FOR PLANAR ANISOTROPIC METALS

Modeling of sheet metal forming processes requires an accurate description of anisotropic material behavior. This paper describes the finite element (FEM) simulation results obtained using Barlat's six-component anisotropic yield function, developed recently. The hydraulic bulge and cup drawing tests were modeled for a 2008-T4 aluminum alloy, using this new yield function incorporated into ABAQUS. For the hydraulic bulge test, bulge profiles and pole displacement versus bulge pressure were computed. For the cup drawing test, earing profiles, cup heights, and cup thickness profiles were computed. Good agreement was found between FEM simulations and experiments. The results show that a valuable mathematical tool is now available which can be used for the forming simulation of planar anisotropic metals.