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A phenomenological model of creep transient was developed on the basis of well-known concepts such as the internal stress, Bailey-Orowan equation, and the continuum damage mechanics. The model described was composed of a set of rate equations which independently have physical meanings. A special emphasis was focused on how to determine the material constants without the use of non-linear regression methods. Norton's power relation of the creep rate with the stress was used to reduce the number of independent variables. The definition of creep tolerance parameter and Norton's power law constants were modified to include the effect of creep damage. Experimental results show that this model can replace the empirical expressions for creep behaviour.

Additional information

Authors: LEE B S, Korea Atomic Energy Research Institute, Taejon (KR);STAMM H, JRC Ispra (IT);NAM S W, Korea Advanced Institute of Science and Technology (KR)
Bibliographic Reference: Paper presented: Tenth International Conference on the Strength of Materials : ICSMA 10, Sendai (JP), August 21-26, 1994
Availability: Available from (1) as Paper EN 38818 ORA
Record Number: 199510204 / Last updated on: 1995-02-21
Original language: en
Available languages: en