Title
Analytical Method To Determine The Tertiary Creep Damage Constants Of The Kachanov-Rabotnov Constitutive Model
Keywords
Constitutive modeling; Creep rupture; Damage mechanics; Life prediction; Ni-based superalloy
Abstract
The classic Kachanov-Rabotnov isotropic creep damage constitutive model has been used in many situations to predict the creep deformation of high temperature components. Typically, the secondary creep behavior is determined by analytical methods; however, the tertiary creep damage constants are found using a mixture of trial and error and numerical optimization. These methods require substantial hand calculations and computational time to determine the tertiary creep damage constants. In this paper, a novel analytical method is developed to determine the tertiary creep damage constants. Comparisons between numerical optimized constants and those found using the analytical method are given for a Ni-based superalloy. Creep deformation, damage evolution, and rupture time predictions are compared. A detailed discussion of the analytical method is given. Copyright © 2010 by ASME.
Publication Date
12-1-2010
Publication Title
ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume
9
Number of Pages
177-184
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.1115/IMECE2010-39153
Copyright Status
Unknown
Socpus ID
84881415245 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84881415245
STARS Citation
Stewart, Calvin M. and Gordon, Ali P., "Analytical Method To Determine The Tertiary Creep Damage Constants Of The Kachanov-Rabotnov Constitutive Model" (2010). Scopus Export 2010-2014. 431.
https://stars.library.ucf.edu/scopus2010/431