On the Applicability of Acoustoelasticity for Residual Stress Determination

[+] Author and Article Information
G. C. Johnson

Department of Mechanical Engineering, University of California, Berkeley, Calif. 94720

J. Appl. Mech 48(4), 791-795 (Dec 01, 1981) (5 pages) doi:10.1115/1.3157735 History: Received February 01, 1980; Revised December 01, 1980; Online July 21, 2009


Acoustoelasticity has recently been used for the nondestructive evaluation of residual stresses. In making such measurements the assumption has been made that the plastic flow leading to the residual stress state did not change the acoustic response of the material. This paper examines the extent to which that assumption holds for three aluminum alloys. The acoustoelastic theory is summarized and results are presented for tests of specimens under uniaxial tension which are subjected to plastic deformation followed by complete unloading. It is shown that the assumption made does not hold for all materials and that further theoretical development is required for general quantitative residual stress determination.

Copyright © 1981 by ASME
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