Progress in Developing Constitutive Equations for Inelastic Design Analysis

[+] Author and Article Information
C. E. Pugh

Structural Design Technology, Materials and Structures Technology Management Center, Oak Ridge National Laboratory, Oak Ridge, Tenn. 37830

J. Pressure Vessel Technol 105(3), 273-276 (Aug 01, 1983) (4 pages) doi:10.1115/1.3264278 History: Received August 13, 1982; Revised April 26, 1983; Online November 05, 2009


A summary is given of the constitutive equations that have been developed for use in design assessments of elevated temperature components of liquid metal fast breeder reactors. The discussion addresses representations of short-term (plastic) and long-term (creep) inelastic material responses. Attention is given to improved representations of the interactions between plastic and creep deformations. Most of the discussion is in terms of constitutive equations that make use of the concept of separating the total strain into elastic, plastic, and creep portions. Additionally, some discussion is given of progress being made toward establishing design equations based on unified measures of inelastic strain that do not distinguish different strain portions.

Copyright © 1983 by ASME
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