Generally, commercial finite element method (FEM) software was used for sheet forming simulation. In this study, anisotropic yield function for aluminium alloy sheets was investigated by using commercial FEM software "LS-DYNA V950". Cup deep drawing and punch stretching test simulation have been carried out using 5000 series aluminium alloy (4.5 percent Mg, 1.0mmt) sheet. There was a little difference among the forming limits of cup test simulation by using various yield functions. The forming limit and the principle strain near the fracture zone measured by experiment (using scribed circle method) were in good agreement with the results calculated by using Barlat model (1989). Barlat model would be suitable to sheet forming simulation for aluminium alloy.
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