Voxel-Scale Digital Volume Correlation |
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Authors: | H Leclerc J-N Périé S Roux F Hild |
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Institution: | 1.Laboratoire de Mécanique et Technologie (LMT-Cachan),ENS Cachan/CNRS/UPMC/PRES UniverSud Paris,Cachan Cedex,France;2.Institut Clément Ader (ICA),Université de Toulouse, INSA, UPS, Mines Albi, ISAE,Toulouse,France |
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Abstract: | Among various correlation techniques to find the displacement field of a volume imaged by X-ray tomography at several deformation
states, a new approach is proposed where the displacement is measured down to the voxel scale and determined from a mechanically regularized system using the equilibrium gap method, and an additional boundary regularization. It is shown that even if the underlying
material behavior is not very well known, this approach leads to extremely small correlation residuals. An excellent stability
of the estimated displacement field for noisy (reconstructed) volumes is also observed. |
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