Abstract
In order to get the reduction limit caused by wrinkles in the neck forming process of aluminum beverage can, a simplified mathematical model was proposed. In the model, the plastic buckling theory for flat plate based on an isotropic model by Thurlimann and Haaijer, and the Bleich's equivalent modulus are used. The effect of material properties and die angle on the reduction limit were examined by the model with the finite element analysis using LS–DYNA–3D. Main results are as follows; 1) The solutions of the model agreed well with those of the finite element analysis. 2) Low yield stress, high work hardening ratio and high die angle increases reduction limit. 3) The method to get equivalent modulus for non linear hardening material is proposed.
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