Analysis of Sheet Metal Stamping by a Finite-Element Method

[+] Author and Article Information
N.-M. Wang

Mathematics Department, General Motors Research Laboratories, Warren, Mich.

B. Budiansky

Division of Applied Sciences, Harvard University, Cambridge, Mass.

J. Appl. Mech 45(1), 73-82 (Mar 01, 1978) (10 pages) doi:10.1115/1.3424276 History: Received March 01, 1977; Revised June 01, 1977; Online July 12, 2010


On the basis of the nonlinear theory of membrane shells, a general finite-element procedure is developed for calculating the deformations in the stamping of sheet metal by arbitrarily shaped punches and dies. The sheet material is assumed to be elastic-plastic and satisfy a rate-insensitive, Mises-type flow rule taking into account finite deformation, work-hardening and normal anisotropy. Coulomb friction is assumed at the contacting surfaces between sheet and punch and between sheet and die. Numerical results obtained from application of the procedure to the hemispherical punch stretching of circular sheets are compared with existing axisymmetric solutions and experimental data.

Copyright © 1978 by ASME
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