3D CP-XFEM modelling of short crack propagation interacting with twist/tilt nickel grain boundaries
File(s)
Published version
Author(s)
Zhang, Xiaoxian
Dunne, Fionn PE
Type
Journal Article
Abstract
Short fatigue crack growth across grain boundaries of differing tilt and twist combinations has been investigated in three dimensions using coupled crystal plasticity and extended finite element methods. Crack path selection and growth rate are mechanistically determined by considering crystallographic planes containing the highest shear strain and the achievement of a critical stored energy density respectively. Tilt angle is found to have weak influence on crack growth rates approaching the grain boundary but increasing twist angle was shown to lead to higher growth rate retardation, as observed in experiments. Large twist angle was also shown to lead to multi-slip system activation as the crack tip traversed the grain boundary, potentially giving rise to multiple crack planes and hence faceted cracks. Elastic stored energy density was shown to capture observed sensitivity of crack growth rates and retardations to grain boundary tilt and twist, and in combination, thereby offering an improved metric over residual Burgers vector and geometric compatibility.
Date Issued
2022-11
Date Acceptance
2022-08-08
Citation
Journal of the Mechanics and Physics of Solids, 2022, 168
ISSN
0022-5096
Publisher
Elsevier
Journal / Book Title
Journal of the Mechanics and Physics of Solids
Volume
168
Copyright Statement
© 2022 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:000860555200008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
CRYSTAL PLASTICITY
DEFORMATION
DISLOCATION
ENERGY DENSITY
GROWTH
Materials Science
Materials Science, Multidisciplinary
Mechanics
MICROSTRUCTURE
NUCLEATION
Physical Sciences
Physics
Physics, Condensed Matter
Science & Technology
SHORT FATIGUE CRACKS
SLIP TRANSFER
Technology
TRANSMISSION
Publication Status
Published
Article Number
105028
Date Publish Online
2022-08-09