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1771969 
Journal Article 
Dislocation theory based short crack model and its application for aircraft aluminum alloys 
Liao, Min 
2010 
Yes 
Engineering Fracture Mechanics
ISSN: 0013-7944 
77 
1 
22-36 
WOS:000274559100002 
This paper presents a study on dislocation theory based
short/small crack modeling, and its application for short crack growth life analysis on 2024-T351
aluminum specimens. The dislocation theory was applied to determine the crack tip opening
displacement (CTOD) of a microstructurally short crack by taking into account the effects of
microstructural features, such as grain size, orientation, and grain boundary. The CTOD was then
used as the parameter for calculating the short crack growth rate. In this work, an existing CTOD
model was modified for estimating the short crack life of 2024-T351 single edge notch tension
(SENT) specimens, which were tested in an Advisory Group for Aerospace Research and Development
(AGARD) program [Newman JC, Edward PR. Short-crack growth behavior in an aluminum alloy: an AGARD
cooperative test programme. AGARD-R-732, NATO, Advisory Group for Aerospace Research and
Development; 1988]. The analytical results matched the test results reasonably well. Crown
Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved. 
Dislocation theory; Short/small crack growth; CTOD (crack tip opening displacement); Aluminum; HOLSIP (Holistic Structural Integrity Process); Monte Carlo