SYMPOSIA PAPER Published: 01 January 1973

A Realistic Model for the Deformation Behavior of High-Temperature Materials


A materials model (constitutive equation) is developed for the purpose of obtaining greater realism in high-tempera lure fatigue analysis. Creep, relaxation, strain hardening, Bauschinger effect, cyclic shakedown, rate effects, and response to more complex loadings are some of the phenomena which this model simulates. Test data from thermal-mechanical fatigue tests verify its predictions quantitatively.

The model's form is an equation for the rate of nonelastic strain as a function of current stress, current temperature, and strain history. Its use in the design of turbine blades and vanes and other high-temperature structures is discussed. A multidimensional form is presented for application to finite element programs.

Author Information

Milled, AK
Stanford University, Stanford, Calif.
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Developed by Committee: E08
Pages: 613–624
DOI: 10.1520/STP38873S
ISBN-EB: 978-0-8031-5576-3
ISBN-13: 978-0-8031-5528-2