عنوان مقاله [English]
The purpose of this work is to introduce a quick tool for prediction of the blank geometry and forming severity in the stamping of general sheet metal parts. In this method, formability is evaluated by the prediction of wrinkles and splitting at the stage of design. In other words, having the 3D part geometry, the mechanical properties of the material and the physical conditions, all the mentioned goals can be achieved. To achieve this goal, the total deformation theory of plasticity has been employed. As the original position of the blank is on the horizontal plane, the vertical movement of each node during the deformation is known. Therefore the problem can be evaluated as a 2D problem. Also, to find an appropriate guess at the early stages of computation, a special unfolding technique has been used. The solution provides not only the optimum blank shape geometry, but, also, all the components of the strain. The results of the analyses for some industrial parts have been compared with some published experimental data and results obtained by other commercial software.