A dynamic discrete dislocation plasticity study of elastodynamic shielding of stationary cracks
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Accepted version
Published version
Author(s)
Gurrutxaga Lerma, B
Balint, DS
Dini, D
Sutton, AP
Type
Journal Article
Abstract
Employing Dynamic Discrete Dislocation Plasticity (D3P), an elastodynamic analysis of the
shielding of a stationary crack tip by dislocations is studied. Dislocations are generated via FrankRead
sources, and make a negligible contribution to the shielding of the crack tip, whereas dislocations
generated at the crack tip via homogeneous nucleation dominate the shielding. Their
effect is found to be highly localised around the crack, leading to a magnification of the shielding
when compared to time-independent, elastostatic predictions. The resulting attenuation of KI (t)
is computed, and is found to be directly proportional to the applied load and to √
t.
shielding of a stationary crack tip by dislocations is studied. Dislocations are generated via FrankRead
sources, and make a negligible contribution to the shielding of the crack tip, whereas dislocations
generated at the crack tip via homogeneous nucleation dominate the shielding. Their
effect is found to be highly localised around the crack, leading to a magnification of the shielding
when compared to time-independent, elastostatic predictions. The resulting attenuation of KI (t)
is computed, and is found to be directly proportional to the applied load and to √
t.
Date Issued
2016-09-09
Date Acceptance
2016-08-25
Citation
Journal of the Mechanics and Physics of Solids, 2016, 98, pp.1-11
ISSN
0022-5096
Publisher
Elsevier
Start Page
1
End Page
11
Journal / Book Title
Journal of the Mechanics and Physics of Solids
Volume
98
Copyright Statement
Creative Commons Attribution 4.0 International (CC BY 4.0)
License URL
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Engineering and Physical Sciences Research Council
Grant Number
N/A
EP/L015579/1
Subjects
Mechanical Engineering & Transports
01 Mathematical Sciences
02 Physical Sciences
09 Engineering
Publication Status
Published