Engineering Transactions, 47, 2, pp. 203–215, 1999

A Modified Flow Field in the Extrusion of Bimetallic Systems

R.E. Śliwa
Rzeszów University of Technology

G.S. Mishuris
Rzeszów University of Technology

The aim of the paper is to propose a new kinematically admissible velocity field corresponding to experimental results of the co-extrusion of various materials. A modified mathematical description of the plastic flow in the extrusion of the bi-metallic composite including boundaries of the plastic zone described by appropriate functions has been proposed. Velocities, grid distortion and strain rate distribution have been calculated by taking into account information on the plastic zone boundaries and their forms. Excellent agreement between the analytical and the experimental results of the plastic flow of longitudially oriented metal composite has been established.
Full Text: PDF


J.L. ALCARAZ and J. GIL-SEVILLANO, An analysis of the extrusion of bimetallic tubes by numerical simulation, Int. J. Mech. Sci., 38, 2, 157–173, 1996.

J.L. ALCARAZ and J. GIL-SEVILLANO, Safety maps in bimetallic extrusions, Jour. Mat. Proc. Techn., 60, 133–140, 1996.

J.L. ALCARAZ, J.M. MARTINEZ-ESNAOLA and J. GIL-SEVILLANO, An analytical approach to the sires field in the extrusion of bimetallic tubes, Int. J. Solids Structures, 33, 14, 2075–2093, 1996.

J. KUSIAK and E.G. THOMPSON, Optimization techniques for extrusion die shape design, NUMIFORM'89, A.A. Balkema, Rotterdam 1989, 569.

E.R. LAMBERT and Sh. KOBAYASHI, A theory on the mechanics of axisymmetric extrusion through conical dies, J. Mech. Engng Sci., 10, 5, 367–380, 1968.

R. ŚLIWA, A test determining the ability of different materials to undergo simultaneous plastic deformation to produce metal composites, Mat. Sci. Engng. A 135, 259–265, 1991.

R. ŚLIWA, Evaluation of the ability of different metals to form metal composite under test and extrusion condition, 7-th Conf. Behaviour of Materials, Hague'95, 1995, 881–888.

R. ŚLIWA, Longitudinally oriented metal composites obtained by large plastic deformation, Proc. Conf. Minerals & Materials 96, vol. II – Materials, Somerset West, South Africa, 1996, 607–614.

R. ŚLIWA, Plastic zones in the extrusion of metal composites, J. Mat. Proc. Techn., 67, 29–35, 1997.

R. ŚLIWA and G. MISHURIS, A modelling the plastic flow of composite materials in the extrusion process, Engng. Trans., 45, 2, 275–293, 1997.

H. TOKUNO and K. IKEDA, Analysis of deformation in extrusion of composite rods, Jour. Mat. Proc. Techn., 26, 323–335, 1991.

K. WASHIZU, Variational Methods in Elasticity and Plasticity, Pergamon Press, 1982.

DOI: 10.24423/engtrans.629.1999

Copyright © 2014 by Institute of Fundamental Technological Research
Polish Academy of Sciences, Warsaw, Poland