Three dimensional image correlation from X-Ray computed tomography of solid foam

Abstract : A new methodology is proposed to estimate 3D displacement fields from pairs of images obtained from X-Ray Computed Micro Tomography (XCMT). Contrary to local approaches, a global approach is followed herein that evaluates {\em continuous} displacement fields. Although any displacement basis could be considered, the procedure is specialized to finite element shape functions. The method is illustrated with the analysis of a compression test on a polypropylene solid foam (independently studied in a companion paper). A good stability of the measured displacement field is obtained for cubic element sizes ranging from $16$ voxels to $6$ voxels.
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Submitted on : Sunday, December 16, 2007 - 6:15:01 PM
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Stéphane Roux, François Hild, Philippe Viot, Dominique Bernard. Three dimensional image correlation from X-Ray computed tomography of solid foam. Composites Part A: Applied Science and Manufacturing, Elsevier, 2008, 39 (8), pp.1253-1265. ⟨10.1016/j.compositesa.2007.11.011⟩. ⟨hal-00198126⟩

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