Compressive Strain-Rate Tests on Six Selected Materials at Strain Rates From 10−3 to 104 In/In/Sec

[+] Author and Article Information
C. J. Maiden, S. J. Green

GM Defense Research Laboratories, General Motors Corporation, Santa Barbara, Calif.

J. Appl. Mech 33(3), 496-504 (Sep 01, 1966) (9 pages) doi:10.1115/1.3625114 History: Received May 24, 1965; Revised September 07, 1965; Online September 15, 2011


The results of compressive strain-rate tests on 6061-T6 aluminum, 7075-T6 aluminum, 6Al-4V titanium fully annealed, pyrolytic graphite, lucite, and micarta for rates of loading of 10−3 to 104 in/in/sec are presented. A medium strain-rate machine and a split Hopkinson bar apparatus used to conduct these tests are described, and the principle of operation, data-reduction methods, and a critique of techniques are given for each machine. Results of the tests show that the two aluminums exhibit no strain-rate sensitivity over the rates tested. Titanium, lucite, and micarta are rate sensitive with the titanium exhibiting a delayed yield and the lucite and micarta showing viscoelastic behavior. The pyrolytic graphite shows little rate sensitivity below 10 in/in/sec and slight sensitivity above this rate.

Copyright © 1966 by ASME
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