Case studies of computational simulations of fatigue crack propagation using finite elements analysis tools

Infante, V and Silva, J 2011, 'Case studies of computational simulations of fatigue crack propagation using finite elements analysis tools', Engineering Failure Analysis, vol. 18, no. 2, pp. 616-624.


Document type: Journal Article
Collection: Journal Articles

Title Case studies of computational simulations of fatigue crack propagation using finite elements analysis tools
Author(s) Infante, V
Silva, J
Year 2011
Journal name Engineering Failure Analysis
Volume number 18
Issue number 2
Start page 616
End page 624
Total pages 9
Publisher Pergamon
Abstract This paper presents three case studies based on the numerical determination of the stress intensity factor (K) related with different crack front geometries due to fatigue using two commercial finite element analysis codes (ZENCRACK® and ABAQUS®). Cases 1 and 2 considered a double-U notch specimen used in high temperature fatigue testing. Stress distribution in the vicinity of the U notch has been obtained, as well as numeric solutions of K for crack front geometries with rectilinear, corner and unconventional crack front shapes. In the case of the standard crack geometries the results have been validated with classic solutions existing in literature. In the third case study, several computational simulations were carried out aiming at determining the K solution for distinct crack front positions, considering the influence of different geometric features of the specimen. Additionally, a stress triaxility parameter was used in order to confirm the stress state condition in the crack propagation region. The conclusions of this study are encouraging concerning the possibility of using ZENCRACK® as an advantageous computational tool for obtaining K solutions in the case of particular crack front geometries as obtained from fatigue experimental testing.
Subject Aerospace Engineering not elsewhere classified
Keyword(s) Stress intensity factor
Finite element analysis
Stress triaxility
Fatigue
DOI - identifier 10.1016/j.engfailanal.2010.09.027
Copyright notice © 2010 Elsevier Ltd. All rights reserved.
ISSN 1350-6307
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