A dynamic discrete dislocation plasticity study of elastodynamic shielding of stationary cracks

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Title: A dynamic discrete dislocation plasticity study of elastodynamic shielding of stationary cracks
Author(s): Gurrutxaga Lerma, B
Balint, DS
Dini, D
Sutton, AP
Item 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.
Publication Date: 9-Sep-2016
Date of Acceptance: 25-Aug-2016
URI: http://hdl.handle.net/10044/1/39516
DOI: https://dx.doi.org/10.1016/j.jmps.2016.08.014
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)
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering and Physical Sciences Research Council
Funder's Grant Number: N/A
EP/L015579/1
Keywords: Mechanical Engineering & Transports
01 Mathematical Sciences
02 Physical Sciences
09 Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Condensed Matter Theory
Mechanical Engineering
Physics
Faculty of Natural Sciences



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