Sheet Metal Forming Limits Under Complex Strain Paths Using Void Growth and Coalescence Model

[+] Author and Article Information
U. S. Rao

National Institute for Training in Industrial Engineering, Bombay, India

R. C. Chaturvedi

Indian Institute of Technology, Bombay, India

J. Eng. Mater. Technol 108(3), 240-244 (Jul 01, 1986) (5 pages) doi:10.1115/1.3225875 History: Received October 22, 1984; Online September 15, 2009


It is well established that ductile fracture occurs by nucleation, growth and coalescence of voids. Several models have been developed to predict limits under constant strain ratio paths considering void inhomogeneity and void growth. In this paper the void growth and coalescence model developed by Rao and Chaturvedi for predicting forming limits under constant strain ratio paths, has been extended for predicting forming limits under two stage strain paths. The predicted results have been compared with experimental results of Ishigaki and analyzed.

Copyright © 1986 by ASME
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