Correlation Parameters for Eliminating the Effect of Pulse Shape on Dynamic Plastic Deformation

[+] Author and Article Information
C. K. Youngdahl

Engineering and Technology Division, Argonne National Laboratory, Argonne, Ill.

J. Appl. Mech 37(3), 744-752 (Sep 01, 1970) (9 pages) doi:10.1115/1.3408605 History: Received December 29, 1970; Online July 12, 2010


The solutions to four classical problems in dynamic plasticity—the circular plate under uniform pressure, the reinforced circular cylindrical shell under uniform pressure, the free-free beam with a central concentrated force, and the circular cylindrical shell with a ring load—are examined to determine the effect of pulse shape on final plastic deformation. It is found that there is a strong dependence on pulse shape for pulses which have the same total impulse and maximum load; however, the effect of the pulse shape is virtually eliminated if the pulses have the same total impulse and “effective load.” The “effective load” is defined as the impulse divided by twice the mean time of the pulse, where the mean time is the interval between the onset of plastic deformation and the centroid of the pulse.

Copyright © 1970 by ASME
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