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RESEARCH PAPERS

Influences of Friction and Metal Properties on Pure Stretchability of Sheet Metals

[+] Author and Article Information
M. Kobayashi

Toyota Technical College, Aichi-ken, Japan

Y. Kurosaki

Mie University, Mie-ken, Japan

N. Kawai

Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan

J. Eng. Ind 102(2), 142-150 (May 01, 1980) (9 pages) doi:10.1115/1.3183846 History: Received August 09, 1979; Online July 30, 2009

Abstract

The influences of the frictional coefficient at the tool-work interface and of the metal properties, such as n-value or r-value, on the stretchability of sheet metals have been examined both theoretically and experimentally. The optimum frictional coefficients for improved stretchability have been found by both numerical analysis and experiment. Their values become smaller as n- and r-values become larger. Stretchability can be markedly improved by reducing the frictional coefficient to less than 0.05, for sheet metals having an n-value of more than 0.2.

Copyright © 1980 by ASME
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