Abstract
To analyze the displacement field in volumes imaged by X-ray tomography at several deformation states, a new approach is proposed whereby the displacement is measured down to the voxel scale and determined from a mechanically regularized system using the equilibrium gap method and additional boundary regularizations. It is then possible to compute a displacement vector for each voxel, inducing lower residuals (in terms of experimental data). As representative reconstructed volumes lead to large numbers of degrees of freedom, a dedicated GPU computational strategy has been developed and implemented. A set of volumes of size 100×170×256 voxels (i.e., more than 13 million kinematic unknowns), which corresponds to a part of a sample made of nodular graphite cast iron and tested in tension, is analyzed.
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Acknowledgments
The support of the French Agence Nationale de la Recherche through ‘RUPXCUBE’ project (ANR-09-BLAN-0009-01) is acknowledged. The tomographic images were obtained at ESRF through a grant for the experiment MA-501 on beamline ID 19. The scans used herein were obtained with the help of Drs. J.-Y. Buffière, A. Gravouil, N. Limodin, W. Ludwig, and J. Rannou.
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© 2014 The Society for Experimental Mechanics, Inc.
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Hild, F., Leclerc, H., Roux, S. (2014). Performing DVC at the Voxel Scale. In: Jin, H., Sciammarella, C., Yoshida, S., Lamberti, L. (eds) Advancement of Optical Methods in Experimental Mechanics, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00768-7_26
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DOI: https://doi.org/10.1007/978-3-319-00768-7_26
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