A Study of the Strain Distributions and Strain Histories in Axisymmetrical Stretch-Forming

[+] Author and Article Information
T. C. Hsu, P. K. Lee

University of Aston, Birmingham, England

J. Eng. Ind 96(4), 1277-1284 (Nov 01, 1974) (8 pages) doi:10.1115/1.3438507 History: Received August 02, 1973; Online July 15, 2010


The strain distributions and strain histories in the axisymmetrical sheet metal forming process have hitherto been difficult to study owing to the lack of a succinct system of representation. The use of a triangular coordinate system to represent the strains in axisymmetrical sheet metal products is explained. Strain distributions and strain paths in sheet steel products are presented for processes involving variations in blank diameter, load on the pressure plate and punch profile radius. It is shown, by studying the growth of draw-in, that the effect of an increase in blank diameter is the same as that of increasing the load on the pressure plate. The various effects of a change in the punch profile radius are also discussed through the diagrams showing the strain distributions and strain paths.

Copyright © 1974 by ASME
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