Title
Creep Crack Growth Simulation Of Ni-Base Superalloy
Keywords
Continuum damage mechanics (CDM); Crack initiation; Creep deformation; Kachanov-rabotnov; Numerical crack growth
Abstract
The purpose of this study is to develop a numerical approach to simulate the creep cracking of a Ni-base superalloy. The approach is based in continuum damage mechanics (CDM) and uses the classic Kachanov-Rabotnov constitutive equations for creep deformation and damage evolution. Creep damage takes the form of defects such as microcracks, cavities, voids, etc. A numerical crack growth algorithm is developed to predict the onset of crack initiation and the successive growth of cracks via element death in the general purpose finite element software ANSYS. In this paper, the Kachanov-Rabotnov constitutive model is implemented as a user material model in ANSYS and the numerical crack growth algorithm is developed and written in ANSYS parametric design language (APDL) command code. A study of mesh size in relation to initial flaw size and initiation time is performed. A demonstration of the proposed numerical crack growth algorithm is performed and a qualitative analysis conducted. A series of improvements and parametric studies are suggested for future work. Copyright © 2013 by ASME.
Publication Date
12-17-2013
Publication Title
Proceedings of the ASME Turbo Expo
Volume
7 A
Number of Pages
-
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.1115/GT2013-96005
Copyright Status
Unknown
Socpus ID
84890191820 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84890191820
STARS Citation
Stewart, Calvin M. and Gordon, Ali P., "Creep Crack Growth Simulation Of Ni-Base Superalloy" (2013). Scopus Export 2010-2014. 5976.
https://stars.library.ucf.edu/scopus2010/5976