The Prediction of Creep-Rupture Times of Rotating Disks Using Biaxial Damage Relationships

[+] Author and Article Information
D. R. Hayhurst

Department of Engineering, University of Leicester, Leicester, LEI 7RH, England

J. Appl. Mech 40(4), 915-920 (Dec 01, 1973) (6 pages) doi:10.1115/1.3423187 History: Received July 01, 1972; Revised December 01, 1972; Online July 12, 2010


Lower-bound expressions for the rupture times corresponding to a maximum tension stress damage law are developed for the creep of disks rotating under conditions of plane stress and plane strain. Computed values of the lower-bound rupture times are shown to be in close agreement with the results of numerical solutions for maximum tension and biaxial tension stress damage laws. The lower-bound rupture time is shown to correspond with the result of a constant stress rupture test carried out under the conditions of the steady-state stress at a reference point in the structure. The steady-state reference stress, for two kinematically determinate structures and different rupture laws, is shown to closely predict values of the rupture time obtained from independent solutions.

Copyright © 1973 by ASME
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