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Localisation de la déformation par corrélationd'images numériques sur laine de verre crêpée

Published online by Cambridge University Press:  07 February 2007

Sandra Bergonnier ,
François Hild  and
Stéphane Roux
Sandra Bergonnier
Affiliation:
LMT-Cachan, ENS de Cachan, CNRS-UMR 8535, Université Paris 6, 61 avenue du Président Wilson, 94235 Cachan Cedex, France Laboratoire "Surface du Verre et Interfaces", UMR CNRS/Saint-Gobain 125, 39 quai Lucien Lefranc, 93303 Aubervilliers Cedex, France
François Hild
Affiliation:
LMT-Cachan, ENS de Cachan, CNRS-UMR 8535, Université Paris 6, 61 avenue du Président Wilson, 94235 Cachan Cedex, France
Stéphane Roux
Affiliation:
Laboratoire "Surface du Verre et Interfaces", UMR CNRS/Saint-Gobain 125, 39 quai Lucien Lefranc, 93303 Aubervilliers Cedex, France
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Abstract

Une approche multi-échelles de la corrélation d'images numériquesest présentée. Elle permet de résoudre précisément lesfluctuations du champ de déplacement. Cette technique de mesureest ensuite appliquée à des essais de compression et d'arrachementréalisés sur laine de verre crêpée. Les champs de déplacement etde déformation sont alors déterminés. Cette méthode révèle, lorsde la réalisation d'essais de compression, des hétérogénéités dedéformation, prémices de la localisation, bien avant le plateau decontrainte. Les essais d'arrachement permettent d'identifierl'amorçage et la propagation de fissures. La fiabilité et larésolution des champs de déplacements et de déformations sontvalidées en utilisant différents paramètres lors de l'analyse parcorrélation.

Keywords

Image correlationglass woolstrainlocalizationmultiscale analysisCorrélation d'imageslaine deverrelocalisation de la déformationanalyse multi-échelles
Type
Research Article
Information
Mechanics & Industry , Volume 7 , Issue 4 , July 2006 , pp. 383 - 391
Copyright
© AFM, EDP Sciences, 2007

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