Limit Analysis of Hollow Disk Forging—Part 1: Upper Bound

[+] Author and Article Information
B. Avitzur

Lehigh University, Bethlehem, Pa.

F. Sauerwine

Metals and Minerals Research, Gulf & Western Natural Resources Group, Palmerton, Pa.

J. Eng. Ind 100(3), 340-344 (Aug 01, 1978) (5 pages) doi:10.1115/1.3439437 History: Received June 27, 1977; Online July 15, 2010


An upper bound analysis for hollow disk forging is presented. Flow is described by a kinematically admissible velocity field which accounts for bulging of the inner and outer surfaces. The friction stress is assumed to be constant across the entire platen-hollow disk interface. Analytical predictions include the relative neutral radius, a bulge parameter and the relative average pressure all in terms of friction and hollow disk geometry. An improvement is observed over previous parallel velocity field solutions.

Copyright © 1978 by ASME
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