Multiscale displacement field measurement using digital image correlation: Application to the identification of elastic properties - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Experimental Mechanics Année : 2015

Multiscale displacement field measurement using digital image correlation: Application to the identification of elastic properties

Florian Bugarin
Christoph David
  • Fonction : Auteur
  • PersonId : 952973
Jean-Noël Périé

Résumé

As any Digital Image Correlation (DIC) method, Finite-Element(FE) based DIC methods lead to uncertainties which are related to the spatial resolution (in pixel / element). To overcome the tricky and well-know compromise between spatial resolution and uncertainty, a multiscale approach to FE-DIC is proposed. Additional near-field images are used to improve locally the resolution of the measurement for a given measurement mesh. An automatic and accurate estimation of the nearfield / farfield transformation is obtained by a dedicated DIC based method, in order to bridge precisely the measurement performed at both scales. This multiscale measurement is then associated to a multiscale Finite Element Model Updating (FEMU) identification technique. After being validated on synthetic test cases, the method is applied to a tensile test carried out on an open-hole specimen made of glass / epoxy laminate. The four in-plane orthotropic elastic parameters are identified at different levels of loading. Results shows that the multi-scale approach greatly improves the uncertainty of both the measured displacement and the identified material parameters.
Fichier principal
Vignette du fichier
Passieux_etal_LocalGlobal-DIC_EM.pdf (4.43 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00949038 , version 1 (19-02-2014)

Identifiants

Citer

Jean-Charles Passieux, Florian Bugarin, Christoph David, Jean-Noël Périé, Laurent Robert. Multiscale displacement field measurement using digital image correlation: Application to the identification of elastic properties. Experimental Mechanics, 2015, 55 (1), pp.121-137. ⟨10.1007/s11340-014-9872-4⟩. ⟨hal-00949038⟩
512 Consultations
825 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More