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| HAL : hal-00341281, version 1 |
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| Experimental Mechanics 49, 3 (2009) 353-370 |
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| Assessment of Digital Image Correlation measurement errors: Methodology and results |
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| Michel Bornert 1Fabrice Brémand 2 |
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| GDR 2519 Collaboration(s) |
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| (2009) |
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| Optical full-field measurement methods such as Digital Image Correlation (DIC) are increasingly used in the field of experimental mechanics, but they still suffer from a lack of information about their metrological performances. To assess the performance of DIC techniques and give some practical rules for users, a collaborative work has been carried out by the Workgroup "Metrology" of the French CNRS research network 2519 "MCIMS"1. A methodology is proposed to assess the metrological performances of the image processing algorithms that constitute their main component, the knowledge of which being required for a global assessment of the whole measurement system. The study is based on displacement error assessment from synthetic speckle images. Series of synthetic reference and deformed images with random patterns have been generated, assuming a sinusoidal displacement field with various frequencies and amplitudes. Displacements are evaluated by several DIC packages based on various formulations and used in the French community. Evaluated displacements are compared with the exact imposed values and errors are statistically analyzed. Results show general trends rather independent of the implementations but strongly correlated with the assumptions of the underlying algorithms. Various error regimes are identified, for which the dependence of the uncertainty with the parameters of the algorithms, such as subset size, gray level interpolation or shape functions, is discussed. |
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| 1 : | Laboratoire de mécanique des solides (LMS) |
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CNRS : UMR7649 – Polytechnique - X – MINES ParisTech - École nationale supérieure des mines de Paris |
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| 2 : | Laboratoire de mécanique des solides (LMS) |
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CNRS : UMR6610 – Université de Poitiers |
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| 3 : | ENIT |
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ENIT |
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| 4 : | Laboratoire de Mécanique et Ingénieries (LAMI) |
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Université Blaise Pascal - Clermont-Ferrand II – Institut Français de Mécanique Avancée |
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| 5 : | Laboratoire de Mécanique et Technologie (LMT) |
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CNRS : UMR8535 – Université Pierre et Marie Curie [UPMC] - Paris VI – École normale supérieure de Cachan - ENS Cachan |
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| 6 : | Laboratoire de Tribologie et Dynamique des Systèmes (LTDS-ENSMSE) |
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CNRS – Ecole Centrale de Lyon – Ecole Nationale d'Ingénieurs de Saint Etienne – École Nationale Supérieure des Mines - Saint-Étienne |
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| 7 : | Centre de Recherche Outillages, Matériaux et Procédés (CROMeP) |
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École Nationale Supérieure des Mines - Albi-Carmaux |
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| 8 : | Visuol Technologies |
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Visuol Technologies |
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| 9 : | Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME) |
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Université de Savoie |
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| 10 : | Laboratoire de mécanique et génie civil (LMGC) |
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CNRS : UMR5508 – Université Montpellier II - Sciences et techniques |
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| ThermoMécanique des Matériaux |
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| Domaine | : | Physique/Mécanique/Mécanique des matériaux Sciences de l'ingénieur/Mécanique/Mécanique des matériaux |
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| Digital image correlation – Error assessment – Spatial resolution – Displacement resolution – Uncertainty assessment – Benchmark – Speckle pattern – Texture |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00341281, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00341281 | |
| oai:hal.archives-ouvertes.fr:hal-00341281 | |
| Contributeur : François Hild | |
| Soumis le : Lundi 24 Novembre 2008, 20:06:35 | |
| Dernière modification le : Lundi 12 Novembre 2012, 11:46:52 | |
