Plastic Waves of Combined Stresses Due to Longitudinal Impact of a Pretorqued Tube—Part 1: Experimental Results

[+] Author and Article Information
J. Lipkin

Sandia Laboratories, Albuquerque, N. Mex.

R. J. Clifton

Brown University, Providence, R. I.

J. Appl. Mech 37(4), 1107-1112 (Dec 01, 1970) (6 pages) doi:10.1115/1.3408666 History: Received November 12, 1969; Revised March 20, 1970; Online July 12, 2010


Experiments are reported in which annealed aluminum tubes are subjected to a static plastic torque followed by a longitudinal compressive impact. Measurements are made of both longitudinal and shear strain-time profiles at stations along the specimen. Qualitatively, the strain response at the gages corresponds to the arrival of a fast wave for which torsional strain decreases while longitudinal strain increases followed by a slow wave for which both torsional and longitudinal strains increase. Between the slow and fast waves and following the slow wave, a strain rate of the order of 10 sec−1 is maintained.

Copyright © 1970 by ASME
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