3D X-ray Microtomography Volume Correlation to Study Fatigue Crack Growth

Authors

  • Nathalie Limodin,

    1. Laboratoire Matériaux, Ingénierie et Sciences (MATEIS), INSA-Lyon/UMR CNRS 5510 7, avenue Jean Capelle, F-69621 Villeurbanne, (France)
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  • Julien Réthoré,

    1. Laboratoire de Mécanique des Contacts et des Structures (LaMCoS) INSA-Lyon/UMR CNRS 5259, 20 avenue Albert Einstein, F-69621 Villeurbanne, (France)
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  • Jean-Yves Buffière,

    1. Laboratoire Matériaux, Ingénierie et Sciences (MATEIS), INSA-Lyon/UMR CNRS 5510 7, avenue Jean Capelle, F-69621 Villeurbanne, (France)
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  • François Hild,

    1. Laboratoire de Mécanique et Technologie (LMT-Cachan), ENS de Cachan/ CNRS-UMR 8535/Université Paris 6/PRES UniverSud Paris, 61 avenue du Président Wilson F-94235 Cachan Cedex, (France)
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  • Wolfgang Ludwig,

    1. Laboratoire Matériaux, Ingénierie et Sciences (MATEIS), INSA-Lyon/UMR CNRS 5510 7, avenue Jean Capelle, F-69621 Villeurbanne, (France)
    2. European Synchrotron Radiation Facility/Experimental Division (ESRF), BP 220 6 rue J. Horowitz, F-38043 Grenoble Cedex, (France)
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  • Johann Rannou,

    1. Laboratoire de Mécanique des Contacts et des Structures (LaMCoS) INSA-Lyon/UMR CNRS 5259, 20 avenue Albert Einstein, F-69621 Villeurbanne, (France)
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  • Stéphane Roux

    Corresponding author
    1. Laboratoire de Mécanique et Technologie (LMT-Cachan), ENS de Cachan/ CNRS-UMR 8535/Université Paris 6/PRES UniverSud Paris, 61 avenue du Président Wilson F-94235 Cachan Cedex, (France)
    • Laboratoire de Mécanique et Technologie (LMT-Cachan), ENS de Cachan/ CNRS-UMR 8535/Université Paris 6/UniverSud Paris, 61 avenue du Président Wilson F-94235 Cachan Cedex, (France).
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  • This work was funded by the CETIM Foundation grant entitled PROPAVANFIS: ‘Advanced methods for the experimental and numerical analyses of crack propagations under complex loadings.’ This work was also made possible by an ESRF grant for the experiment MA-501 on ID19 beamline.

Abstract

Global digital volume correlation is used to analyze a series of computed tomography images of a nodular graphite cast iron specimen subjected in situ to a fatigue test. From the obtained displacement field, a specific procedure is implemented to extract stress intensity factors all along the crack front. The proposed methodology allows one to measure key parameters in fatigue crack propagation directly from 3D images.

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