Simulation of bridge die extrusion using the finite element method.

Sheppard, T. and Flitta, I., 2001. Simulation of bridge die extrusion using the finite element method. Materials Science and Technology, 18 (9), pp. 987-994.

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Official URL: http://www.ingentaconnect.com/content/maney/mst/20...

DOI: 10.1179/026708302225004946

Abstract

This communication reviews previous work on the extrusion of hollow shapes and uses a three-dimensional (FEM) solution to predict load-required, temperature of the extrudate and material flow during the process. A comparison with experiments is made to assess the relative importance of some extrusion parameters in the extrusion process and to ensure that the numerical discretisation yields a realistic simulation of the process. The usefulness and limitations of FEM when modelling complex shapes is also discussed. Methods to assess the difficulty of extrusion of hollow extrusions in general are presented. The paper also illustrates the essentials of numerical analysis to assist the reader in the comprehension of the thermomechanical events occurring during extrusion through bridge dies. Results are presented for velocity distribution in the extrusion chamber, iso-temperature contours and pressure/ displacement traces. These are compared with experiments conducted using a 5 MN press. It is shown that the finite element program predicts the pressure requirement: the pressure/displacement trace showing a double peak which is discussed in some detail. The finite element program appears to predict all the major characteristics of the flow observed macroscopically.

Item Type:Article
ISSN:0267-0836
Subjects:Science > Earth Sciences
Group:School of Design, Engineering & Computing > Design Simulation Research Centre
ID Code:933
Deposited By:INVALID USER
Deposited On:04 Jan 2008
Last Modified:07 Mar 2013 14:35

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