Multiaxial Relaxation and Creep Damage Assessments—A Comparison of ASME N-47 and GLOSS Time-Scaling Methods

[+] Author and Article Information
R. Seshadri

Industrial Systems Engineering, University of Regina, Regina, Saskatchewan, Canada

J. Pressure Vessel Technol 115(1), 32-37 (Feb 01, 1993) (6 pages) doi:10.1115/1.2929492 History: Received July 29, 1991; Revised September 28, 1992; Online June 17, 2008


Two simplified methods for determining multiaxial relaxation and creep damage, the GLOSS time-scaling and the ASME Code Case N-47 method, are described in this paper. The theoretical basis and applicability of the methods to various pressure component configurations are discussed in detail. The G -factor in the ASME formula in effect speeds up or slows down the uniaxial relaxation process, similar to the GLOSS time-scaling method. The two methods are compared, and the differences are attributed to local follow-up not being accounted for in the ASME formula.

Copyright © 1993 by The American Society of Mechanical Engineers
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