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dc.contributor.author
 hal.structure.identifier
ROSSI, Marco
85714 Laboratoire de Mécanique et Procédés de Fabrication [LMPF]
dc.contributor.author
 hal.structure.identifier
PIERRON, Fabrice
85714 Laboratoire de Mécanique et Procédés de Fabrication [LMPF]
dc.date.accessioned2012
dc.date.available2012
dc.date.issued2012
dc.identifier.citationComputational Mechanics, vol. 49, n° 1, p. 53-71
dc.identifier.urihttp://hdl.handle.net/10985/6524
dc.description.abstractThe aim of this paper is to provide a general procedure to extract the constitutive parameters of a plasticity model starting from displacement measurements and using the Virtual Fields Method. This is a classical inverse problem which has been already investigated in the literature, however several new features are developed here. First of all the procedure applies to a general three-dimensional displacement eld which leads to large plastic deformations, no assumptions are made such as plane stress or plane strain although only pressure-independent plasticity is considered. Moreover the equilibrium equation is written in terms of the deviatoric stress tensor that can be directly computed from the strain eld without iterations. Thanks to this, the identi cation routine is much faster compared to other inverse methods such as nite element updating. The proposed method can be a valid tool to study complex phenomena which involve severe plastic deformation and where the state of stress is completely triaxial, e.g. strain localization or necking occurrence. The procedure has been validated using a three dimensional displacement eld obtained from a simulated experiment. The main potentialities as well as a rst sensitivity study on the inuence of measurement errors are illustrated.
dc.language.isoen_US
dc.publisherSpringer Link
dc.rightsPre-print
dc.subjectConstitutive modelling
dc.subjectInelastic and nite deformation
dc.subjectInverse methods
dc.subjectNumerical algorithms
dc.titleIdentification of plastic constitutive parameters at large deformations from three dimensional displacement elds
dc.identifier.doi10.1007/s00466-011-0627-0
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Châlons-en-Champagne
dc.subject.halSciences de l'ingénieur: Mécanique
hal.identifierhal-00749836
hal.version1
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