Thermo‐mechanical analysis of cold extrusion process using stream function and finite element methods

Abstract

Purpose

The purpose of this paper is to propose a mathematical model to estimate required energy and temperature distribution during cold extrusion process.

Design/methodology/approach

An admissible velocity field is generated based on stream function technique. Then, the required energy and the temperature distributions in the metal and the extrusion die are determined by a coupled upper bound‐finite element analysis.

Findings

To examine the proposed model, cold extrusion of AA6061‐10%SiC_p is considered and the predicted extrusion force‐displacement diagrams in different reductions are compared with the experimental ones and reasonable agreement is observed. Furthermore, it is found that there is a linear relationship between maximum temperature and logarithm of ram velocity for the examined composite.

Originality/value

This approach requires shorter run‐time as compared with fully finite element analyses while the model is particularly appropriate for high speed extrusion processes where the adiabatic heating is of importance.

Citation

Goodarzi Hosseinabadi, H. and Serajzadeh, S. (2013), "Thermo‐mechanical analysis of cold extrusion process using stream function and finite element methods", Multidiscipline Modeling in Materials and Structures, Vol. 9 No. 1, pp. 128-139. https://doi.org/10.1108/15736101311329205