A discrete crack dynamics model of toughening in brittle polycrystalline material by crack deflection

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Title: A discrete crack dynamics model of toughening in brittle polycrystalline material by crack deflection
Authors: Ebrahimi, M
Balint, D
Sutton, A
Dini, D
Item Type: Journal Article
Abstract: This paper focuses on the study of the effect of the interfacial strength of grain boundaries and elliptical inclusions on crack path deflection. The method is developed to channel a crack into a toughening configuration (arrays of elliptical holes and inclusions are considered) in order to obtain the optimised microstructure required to enhance fracture toughness through different mechanisms. The proposed technique is shown to reproduce experimental crack propagation paths in various configurations and is capable of capturing the effect of that variation of the GB and the inclusion interfacial strength; it provides a powerful tool to understand the interplay between microstructural features and improve materials performance.
Issue Date: 1-Jun-2019
Date of Acceptance: 11-Mar-2019
URI: http://hdl.handle.net/10044/1/67675
DOI: https://dx.doi.org/10.1016/j.engfracmech.2019.03.013
ISSN: 0013-7944
Publisher: Elsevier
Start Page: 95
End Page: 111
Journal / Book Title: Engineering Fracture Mechanics
Volume: 214
Copyright Statement: © 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Element Six Limited
Engineering & Physical Science Research Council (EPSRC)
Engineering and Physical Sciences Research Council
Funder's Grant Number: P/O 19971
EP/N025954/1
EP/L015579/1
Keywords: Science & Technology
Technology
Mechanics
Interfacial energy
Grain boundary
Discrete Crack Dynamics
FINITE-ELEMENT-METHOD
GRAIN-BOUNDARIES
GROWTH
FATIGUE
PROPAGATION
FRACTURE
INCLUSIONS
MATRIX
MD Multidisciplinary
Mechanical Engineering & Transports
Publication Status: Published
Embargo Date: 2020-03-26
Online Publication Date: 2019-03-26
Appears in Collections:Faculty of Engineering
Condensed Matter Theory
Mechanical Engineering
Physics
Faculty of Natural Sciences



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