Theoretical and Experimental Studies of Transient Elastic-Plastic Large Deflections of Geometrically Stiffened Rings

[+] Author and Article Information
R. W. H. Wu, E. A. Witmer

Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, Mass.

J. Appl. Mech 42(4), 793-799 (Dec 01, 1975) (7 pages) doi:10.1115/1.3423708 History: Received January 01, 1975; Online July 12, 2010


Finite-element formulations have been derived for the large-deflection elastic-plastic dynamic responses of arbitrarily curved two-dimensional beam structures which may consist of hard-boned, multilayer, geometrically stiffened configurations. Experiments have been conducted for structural responses of geometrically stiffened, freely suspended, circular rings of 6061-T6511 aluminum alloy to intense explosive loading which induces large-deflection elastic-plastic transient and permanent deformations of the structure. Very good correlation of the measured permanent deformation and transient strain with theoretical predictions is demonstrated.

Copyright © 1975 by ASME
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