Abstract
Sheet metal forming is a complex process controlled by process parameters and material properties of the blank sheet. The initial anisotropy has influence on the determination of optimal blank shape because it governs the material flow. In this paper, the influence of the initial anisotropy, in achieving an optimal blank shape, is analyzed using mild steel (DC06) blank sheet and two different tool geometries: circular and rectangular cup. The numerical method is based on the initial NURBS surface used to produce the mesh that models the blank and the resulting flange geometry of the deformed part. Different rolling direction orientations were considered in the blanks for deep drawing to investigate their effect on the blank shape optimization procedure. From the numerical study it is evident that the described method is sensitive to the initial anisotropy in the material and can produce optimal initial blank shape within few iterations.
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