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＜journal article＞
In-situ observation of ductile fracture using X-ray tomography technique

Creator
Author PID
K004938
Creator Name
Toda, Hiroyuki
戸田, 裕之
Affiliation
Affiliation Name
Department of Mechanical Engineering, Toyohashi University of Technology
豊橋技術科学大学
Creator Name
Maire, E.
Affiliation
Affiliation Name
Universite de Lyon
Creator Name
Yamauchi, S.
Affiliation
Affiliation Name
Department of Mechanical Engineering, Toyohashi University of Technology
Creator Name
Tsuruta, H.
Affiliation
Affiliation Name
Department of Mechanical Engineering, Toyohashi University of Technology
Creator Name
Hiramatsu, T.
Affiliation
Affiliation Name
Department of Mechanical Engineering, Toyohashi University of Technology
Author PID
20378243
Creator Name
Kobayashi, Masakazu
小林, 正和
Affiliation
Affiliation Name
Department of Mechanical Engineering, Toyohashi University of Technology
豊橋技術科学大学
Language
English
Publisher
Elsevier
Date
2011-03-01
Source Title
Acta materialia
Vol
59
Issue
5
First Page
1995
Last Page
2008
Publication Type
Accepted Manuscript
Access Rights
open access
Related DOI
https://doi.org/10.1016/j.actamat.2010.11.065
Related URI
https://doi.org/10.1016/j.actamat.2010.11.065
Relation
https://doi.org/10.1016/j.actamat.2010.11.065
Abstract Fast microtomography combined with local crack driving force analysis has been employed to analyze crack-tip stress/strain singularities in an aluminum alloy. The application of fast microtomography h...as made it possible to observe real crack initiation and propagation behaviors without intermediate unloading. The details of a crack and its local propagation behaviors are readily observed with this technique along with evidence of microstructure/crack interactions. After a preliminary investigation of the achieved spatial resolution, we show that conventional stationary and growing crack singularities can be quantitatively validated by deriving the local crack opening displacement. This is to our knowledge the first three-dimensional validation of conventional fracture mechanics during a real time continuous experiment that has been mainly developed via surface observations so far. We also reveal that there is a spatial transition from a stationary crack singularity to a growing crack singularity in addition to the well-known temporal transition that occurs with the onset of crack propagation. Local crack propagation behaviors are also discussed on the basis of this validation. To separate the effects of complex crack geometry from those of microstructure, we also perform an image-based numerical simulation.show more

Details

Record ID
1807807
Peer-Reviewed
Refereed
Subject Terms
Fast tomography
Crack-tip singularity
Local crack driving force
Growing crack
AA2024 aluminum alloy
ISSN
1359-6454
DOI
10.1016/j.actamat.2010.11.065
NCID
AA1106787X
Created Date 2017.05.29
Modified Date 2023.11.24