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A simple way to use X-ray micro-tomography to infer elastic properties of heterogeneous materials: application to sedimentary rocks

  • Pierre-Louis ValdenaireEmail author
  • Jonathan Perrin
  • Olivier Grauby
  • Franz-Josef Ulm
  • Roland J. M. Pellenq
Composites & nanocomposites
  • 42 Downloads

Abstract

Macroscopic mechanical properties of materials depend directly on their microstructure. Microscopy, and more specifically tomography, is a key method for studying microstructures. Here, we propose a simple way to use an X-ray tomogram to infer local elastic properties. We distinguish between two scenarios of microstructure images. In the first scenario, the material is composed by very apparent phases so the image can be easily segmented into a set of subspaces with homogenous properties. In the second scenario, the image, as that of sedimentary rocks, contains poorly contrasted phases, including strong intra-phase heterogeneities. For this case, we propose an alternative to segmentation techniques in order to factor in material heterogeneities. To do this, we use the local X-ray attenuation to define elastic moduli. Then, we compute up-scaled elastic moduli by solving the mechanical equilibrium. Finally, we confirm our method by comparing the up-scaled elastic moduli to indentation experiments performed at the same scale.

Notes

Acknowledgements

Financial support was provided by foundation AMU. The authors also thank Carl Zeiss X-ray microscopy for generously conducting the imaging work at their facilities. P.-L. Valdenaire thanks Shell Game Changer program for support.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.MultiScale Material Science for Energy and Environment, MIT-CNRS-AMU Joint Laboratory/MIT Energy InitiativeMassachusetts Institute of TechnologyCambridgeUSA
  2. 2.Division ExpériencesSynchrotron SoleilGif-sur-YvetteFrance
  3. 3.CNRS-UMR 7325 CINaM (Centre Interdisciplinaire de Nanoscience de Marseille)Aix-Marseille UniversitéMarseille Cedex 9France
  4. 4.Department of Civil and Environmental EngineeringMassachusetts Institute of TechnologyCambridgeUSA

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