Abstract
A combined computational–experimental framework is introduced herein to validate numerical simulations at the microscopic scale. It is exemplified for a flat specimen with central hole made of cast iron and imaged via in-situ synchrotron laminography at micrometer resolution during a tensile test. The region of interest in the reconstructed volume, which is close to the central hole, is analyzed by digital volume correlation (DVC) to measure kinematic fields. Finite element (FE) simulations, which account for the studied material microstructure, are driven by Dirichlet boundary conditions extracted from DVC measurements. Gray level residuals for DVC measurements and FE simulations are assessed for validation purposes.
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Acknowledgements
This study was performed within the COMINSIDE project funded by the French Agence Nationale de la Recherche (ANR-14-CE07-0034-02 Grant). We also acknowledge the European Synchrotron Radiation Facility for provision of beamtime at beamline ID15, experiment MA 1932. It is also a pleasure to acknowledge the support of BPI France (“DICCIT” project), and of the Carnot M.I.N.E.S institute (“CORTEX” project). M. Kuna, L. Zybell and M. Horn from IMFD, TU Freiberg are thanked for materials supply and machining as well as for scientific discussions.
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Buljac, A., Shakoor, M., Neggers, J. et al. Numerical validation framework for micromechanical simulations based on synchrotron 3D imaging. Comput Mech 59, 419–441 (2017). https://doi.org/10.1007/s00466-016-1357-0
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DOI: https://doi.org/10.1007/s00466-016-1357-0