A Constitutive Model for the Inelastic Multiaxial Response of Rene’ 80 at 871C and 982C

[+] Author and Article Information
D. C. Stouffer

Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, Ohio 45221

V. G. Ramaswamy, J. H. Laflen, R. H. Van Stone, R. Williams

General Electric Aircraft Engines, Evendale, Ohio 45215

J. Eng. Mater. Technol 112(2), 241-246 (Apr 01, 1990) (6 pages) doi:10.1115/1.2903315 History: Received November 28, 1988; Revised March 20, 1989; Online April 29, 2008


This paper contains an extension of the uniaxial state variable constitutive model of Ramaswamy et al. (1988) to the case of multiaxial loading. The correlation between uniaxial and multiaxial loading conditions is achieved through the assumptions of material isotropy and conservation of inelastic volume. The multiaxial extension is based only on the material parameters evaluated from uniaxial loading. The research is accompanied by a multiaxial experimental program to evaluate the response of Rene’ 80 at 871°C and 982° C. Experiments in the program include torsion, proportional axial and torsion, and nonproportional loading. It was shown experimentally that there is no extra hardening from the multiaxial loading than results from uniaxial loading. Further, it is shown that the multiaxial model is successful in predicting the experimental results using only the parameters determined from the uniaxial experiments.

Copyright © 1990 by The American Society of Mechanical Engineers
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