Architecture-Driven Digital Volume Correlation: Application to the Analysis of In-Situ Crushing of a Polyurethane Foam

Architecture-Driven Digital Volume Correlation: Application to the Analysis of In-Situ Crushing of a Polyurethane Foam

Background Digital Volume correlation (DVC) consists in identifying the displacement fields that allow for the best possible registration of volume images of a sample captured at various loading stages. With cellular materials, the use of DVC faces an intrinsic limit: in the absence of an exploitabl...

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Bibliographic Details
Published in:Experimental mechanics Vol. 63; no. 5; pp. 897 - 913
Main Authors: Rouwane, A., Doumalin, P., Bouclier, R., Passieux, J.C., Périé, J.N.
Format: Journal Article
Language:English
Published: New York Springer US 01-06-2023
Springer Nature B.V
Society for Experimental Mechanics
Subjects:
Bending
Biomedical Engineering and Bioengineering
Characterization and Evaluation of Materials
Control
Deformation mechanisms
Dynamical Systems
Engineering
Engineering Sciences
Field tests
Finite element method
Kinematics
Lasers
Optical Devices
Optics
Photonics
Polyurethane foam
Regularization
Research Paper
Solid Mechanics
Speckle patterns
Struts
Vibration
Multigrid image registration
Digital volume correlation (DVC)
X-ray microtomography
Cellular materials
Image-based mechanical modeling
Mechanical regularization
Polyurethane foam
Digital Volume Correlation (DVC)
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Summary:Background Digital Volume correlation (DVC) consists in identifying the displacement fields that allow for the best possible registration of volume images of a sample captured at various loading stages. With cellular materials, the use of DVC faces an intrinsic limit: in the absence of an exploitable texture on (or in) the struts or cell walls, the available speckle pattern will unavoidably be formed by the material architecture itself. This leads to the inability of classical DVC techniques to measure kinematics below the cellular scale, i.e. at the sub-cellular or micro scales. Objectives Here, we extend a newly developed architecture-driven DIC technique [ 1 ] for the measurement of 3D displacement fields in real cellular materials at the scale of the architecture. Methods The proposed solution consists in assisting DVC by a weak elastic regularization using, as support, an automatic finite-element image-based mechanical model. Results Complex (locally buckling) kinematics of a polyurethane foam under compression are accurately measured during an in-situ test. The method is essential to evidence the class of dominance (stretching versus bending) of the foam. Conclusion The proposed method allows to confirm that the foam used is bending-dominated, which is not possible with a classical mesoscopic DVC approach. This method is a good candidate for the analysis of complex local deformation mechanisms at the architecture scale.
ISSN:0014-4851
1741-2765
DOI:10.1007/s11340-023-00957-8