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RESEARCH PAPERS

Computer-Aided Visioplasticity Solution to Axisymmetric Extrusion Through Curved Boundaries

[+] Author and Article Information
A. H. Shabaik

Materials Department, School of Engineering and Applied Sciences, University of California, Los Angeles, Calif.

J. Eng. Ind 94(4), 1225-1230 (Nov 01, 1972) (6 pages) doi:10.1115/1.3428343 History: Received July 02, 1971; Online July 15, 2010

Abstract

A procedure for smoothing the experimental values of the flow function ψ in axisymmetric extrusion through curved boundaries was developed. The analysis was applied to a 45 deg conical die with a 6:1 extrusion ratio and a circular arc of 0.33-in. radius and 0.033-in. land at the exit section. An analytical expression of ψ in terms of r and z was obtained and used in the calculation of velocity and strain rate components in axisymmetric extrusion of a superplastic of the eutectic of lead–tin. The stress components were obtained from the known values of the strain rates by considering equilibrium and plasticity equations and material properties.

Copyright © 1972 by ASME
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