Modelling of metal extrusion using the phoenics package

✍ Scribed by D. Bhattacharyya; P.J. Richards; A.A. Somashekar

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 864 KB
• Volume: 35
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/0924-0136(92)90304-b

✦ Synopsis

Computational modelling of both the plane strain and the axisymmetric extrusion of lead with the PHOENICS package is reported. Initial work treated the flow of metal as the flow of a highly viscous Newtonian fluid (the mean viscosity method) but this tended to grossly over-predict the extrusion pressure at high extrusion ratios. Much better results are obtained by treating the flow as that of a thixotropic fluid (the varying viscosity method) where the pseudo-viscosity is calculated at each cell according to the local strain rate. Results computed using the varying viscosity method are shown to be very close to experimental results.