On the mechanistic driving force for short fatigue crack path
File(s)
Published version
Author(s)
Long, Daniel J
Dunne, Fionn PE
Type
Journal Article
Abstract
The growth of fatigue cracks at the microstructural level is significant for many engineering industries. The multifarious nature of crack propagation at microstructure length scales necessitates the use of advanced modelling techniques to predict fatigue life accurately. A key contributor to this is the path of the crack, which also remains challenging to predict; the maximum slip criterion has been used widely in the literature but is not fully adequate. This paper tests the hypothesis that for short crystallographic cracks, there is some other factor responsible for guiding their extension on a particular plane. With this, using a crystal plasticity finite element modelling framework, two new energy-based methods are developed: a microstructure-sensitive maximum energy release rate criterion, and a maximum normal stored energy density criterion. Results demonstrate, for the two cases studied, both methods offer a significant improvement over the maximum slip criterion when applied to real microstructures. In particular, the maximum normal stored energy method gives closest agreement with experiments, while maximum energy release rate offers new insights into a mechanism for crack bifurcation.
Date Issued
2023-10
Date Acceptance
2023-06-19
Citation
Journal of the Mechanics and Physics of Solids, 2023, 179
ISSN
0022-5096
Publisher
Elsevier
Journal / Book Title
Journal of the Mechanics and Physics of Solids
Volume
179
Copyright Statement
© 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/).
(http://creativecommons.org/licenses/by/4.0/).
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001032364900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
BEHAVIOR
CRYSTAL-PLASTICITY
CYCLIC DEFORMATION
GROWTH
Materials Science
Materials Science, Multidisciplinary
Mechanics
Physical Sciences
Physics
Physics, Condensed Matter
PROPAGATION
Science & Technology
Technology
TIP
Publication Status
Published
Article Number
105368
Date Publish Online
2023-06-24