Effective Plastic Constants for Perforated Materials

[+] Author and Article Information
J. Porowski, W. J. O’Donnell

O’Donnell & Assocs., Inc., Pittsburgh, Pa.

J. Pressure Vessel Technol 96(3), 234-241 (Aug 01, 1974) (8 pages) doi:10.1115/1.3454173 History: Received March 25, 1974; Online October 25, 2010


New discontinuous fields of stress are derived for materials perforated in a triangular array of circular holes. These stress fields are applicable for loads of arbitrary bi-axiality and orientation with respect to penetration patterns having moderate to high ligament efficiencies. The corresponding effective plastic constants for the equivalent solid material are derived for use in the limit analyses of structures. The method of constructing these stress fields may also be used for irregular penetration patterns and to evaluate the effect of misplaced holes.

Copyright © 1974 by ASME
Topics: Stress
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