Comparison of Two Complete Solutions in an Axisymmetric Extrusion With Experiment

[+] Author and Article Information
A. H. Shabaik, E. G. Thomsen

University of California, Department of Mechanical Engineering, Division of Mechanical Design, Berkeley, Calif.

J. Eng. Ind 91(3), 543-548 (Aug 01, 1969) (6 pages) doi:10.1115/1.3591626 History: Received July 03, 1968


An upper-bound and a potential solution to a forward extrusion problem were compared with experimental results obtained by the visioplasticity method. The process consisted of extruding a 2-in-dia billet of preforged lead through a conical die having a half-cone angle of 45 deg under the condition of relatively low friction. The comparison was made for steady state stream lines, velocities, strain rate components, effective strain and strain rate, grid distortion, and stress distribution. It was found that the curves were generally of similar shape and that some differences existed in magnitude only. It is suggested that the theoretical solutions can be used to advantage to a first approximation in predicting all important variables.

Copyright © 1969 by ASME
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