4D full-field measurements over the entire loading history: Evaluation of different temporal interpolations

Ana Vrgoč, Viktor Kosin, Clément Jailin, Benjamin Smaniotto, Zvonimir Tomičević and François Hild

Abstract

Standard Digital Volume Correlation (DVC) approaches are based on pattern matching between two reconstructed volumes acquired at different stages. Such frameworks are limited by the number of scans (due to acquisition duration), and time-dependent phenomena can generally not be captured. Projection-based Digital Volume Correlation (P-DVC) measures displacement fields from series of 2D radiographs acquired at different angles and loadings, thus resulting in richer temporal sampling (compared to standard DVC). The sought displacement field is decomposed over a basis of separated variables, namely, temporal and spatial modes. This study utilizes an alternative route in which spatial modes are con-structed via scan-wise DVC, and thus only the temporal amplitudes are sought via P-DVC. This meth-od is applied to a glass fiber mat reinforced polymer specimen containing a machined notch, subjected to in-situ cyclic tension, and imaged via X-Ray Computed Tomography. Different temporal interpolations are exploited. It is shown that utilizing only one DVC displacement field (as spatial mode) was sufficient to properly capture the complex kinematics up to specimen failure.

Key Words

fiber reinforced polymer; in-situ tests; projection-based digital volume correlation; tomography

Address

Ana Vrgoč: Laboratory of Experimental Mechanics, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10002, Zagreb, Croatia; Université Paris-Saclay, CentraleSupélec, ENS Paris-Saclay, CNRS LMPS−Laboratorie de Mécanique Paris-Saclay, Gif-sur-Yvette, France Viktor Kosin: Université Paris-Saclay, CentraleSupélec, ENS Paris-Saclay, CNRS LMPS−Laboratorie de Mécanique Paris-Saclay, Gif-sur-Yvette, France; Leibniz Universität Hannover, Institut für Angewandte Mathematik (IFAM), Hannover, Germany Clément Jailin: GE HealthCare, Buc, France Benjamin Smaniotto: Université Paris-Saclay, CentraleSupélec, ENS Paris-Saclay, CNRS LMPS−Laboratorie de Mécanique Paris-Saclay, Gif-sur-Yvette, France Zvonimir Tomičević: Laboratory of Experimental Mechanics, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10002, Zagreb, Croatia François Hild: Université Paris-Saclay, CentraleSupélec, ENS Paris-Saclay, CNRS LMPS−Laboratorie de Mécanique Paris-Saclay, Gif-sur-Yvette, France

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