Simultaneous Stress Relaxation in Tension and Creep in Torsion of 2618 Aluminum at Elevated Temperature

[+] Author and Article Information
J. S. Lai

Georgia Institute of Technology, Atlanta, Ga. 30332

W. N. Findley

Box D—Engineering, Brown University, Providence, R. I. 02912

J. Appl. Mech 49(1), 19-25 (Mar 01, 1982) (7 pages) doi:10.1115/1.3161967 History: Received November 01, 1980; Revised July 01, 1981; Online July 21, 2009


Experiments are reported for stress relaxation and simultaneous stress relaxation and creep with proportional and nonproportional loading and unloading. Results were compared with predictions of a viscous-viscoelastic theory, and modifications, and strain hardening. Predictions were calculated from results of combined constant-stress tension and torsion creep and recovery tests only, which were reported previously. Results showed that a modified viscous-viscoelastic theory predicted all the observed features and predicted the creep and relaxation rates reasonably well.

Copyright © 1982 by ASME
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