An examination of local strain fields evolution in ductile cast iron through micromechanical simulations based on 3D imaging - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Theoretical, Computational and Applied Mechanics Année : 2022

An examination of local strain fields evolution in ductile cast iron through micromechanical simulations based on 3D imaging

Résumé

Microscopic digital volume correlation (DVC) and finite element precoalescence strain evaluations are compared for two nodular cast iron specimens. Displacement fields from \textit{in-situ} 3D synchrotron laminography images are obtained by DVC. Subsequently the microstructure is explicitely meshed from the images considering nodules as voids. Boundary conditions are applied from the DVC measurement. Image segmentation-related uncertainties are taken into account and observed to be negligible with respect to the differences between strain levels. Macroscopic as well as local strain levels in coalescing ligaments between voids nucleated at large graphite nodules are compared. Macroscopic strain levels are consistently predicted. A very good agreement is observed for one of the specimens, while the strain levels for the second specimen presents some discrepancies. Limitations of the modeling and numerical framework are discussed in light of these differences. A discussion of the use of strain as coalescence indicator is initiated.
Fichier principal
Vignette du fichier
JTCAM2022.pdf (3.9 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03626799 , version 1 (12-07-2022)

Licence

Paternité

Identifiants

Citer

Victor-Manuel Trejo-Navas, Ante Buljac, François Hild, Thilo F. Morgeneyer, Marc Bernacki, et al.. An examination of local strain fields evolution in ductile cast iron through micromechanical simulations based on 3D imaging. Journal of Theoretical, Computational and Applied Mechanics, 2022, pp.1-18. ⟨10.46298/jtcam.7501⟩. ⟨hal-03626799⟩
131 Consultations
28 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More