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Analysis and Artifact Correction for Volume Correlation Measurements Using Tomographic Images from a Laboratory X-ray Source

type de publication      article in an international journal with refereeing comitee
date de publication 2011
auteur(s) Limodin Nathalie; Rethore Julien; Adrien Jérôme; Buffière Jean-Yves; Hild François; Roux Stéphane
journal (abréviation) Experimental Mechanics (Exp Mech)
volume (numéro) 51 (6)
  
pages 959 – 970
résumé The effects of three artifacts (reconstruction, beam hardening and temperature of the X-ray tube) associated with the use of a lab tomograph are analyzed in terms of their induced biases for Digital Volume Correlation (DVC) from a series of reconstructed volumes acquired successively. The most detrimental effect is due to spurious dilatational strains induced by temperature variations in the tomograph. If they are not accounted for, any quantitative kinematic measurement is impossible for strain levels below 0.5%.
mots clés Quantitative kinematic measurements Reconstruction artifacts; Thermal expansion; X-ray computed microtomography
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