CONTINUOUS NUMERICAL METHOD IN ANALYSIS OF AXIS-SYMMETRIC EXTRUSION PROBLEMS: NUMERICAL EXPERIMENTS AND APPLICATION
Keywords:axis-symmetric steady-state extrusion, cylindrical co-ordinate region, grid-lines, grid-points, off grid-points, collocation method, profiled die
The CNM approach to solutions of extrusion problems has been formulated in Izelu et al . The Procedure and results of numerical experiments performed, with some axis-symmetric profiled dies are reported. The results showed that the method is simple and straightforward in its formulation and implementation with the digital computer, and involves less complex mathematical details and minimal geometrical restrictions. They also showed that it is capable of providing, with dense numerical output, direct and complete solution of the metal flow problems in axis-symmetric extrusion together with full predictions of the process performance in any given set of steady-state extrusion conditions. The predicted effects of the interface friction factor and extrusion ratio on die performance are quite in agreement with predictions of other methods.
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