Abstract
Modelling metal forming processes with the dual stream function technique is considered. The dual stream function concept is reviewed. Its numerical implementation in a computer program is presented. The method enables the numerical evaluation of the process power and gives detailed information about other process parameters such as friction between the workpiece and the tool, workpiece geometry and material characteristics. Two selected examples concerning three-dimensional flat rolling and polygonal forging are analysed by this technique. The theoretical predictions are compared with results obtained by other authors using alternative methods. Computational advantages over other methods, namely the finite element method are the main feature of the present analysis.
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