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dc.contributor.authorHOR, Anis
dc.contributor.authorLEBRUN, Jean-Lou
dc.contributor.authorGERMAIN, Guénaël
dc.contributor.author
 hal.structure.identifier
MOREL, Franck
206863 Laboratoire des Arts et Métiers ParisTech d'Angers - Procédés Matériaux Durabilité [LAMPA - PMD]
dc.date.accessioned2014
dc.date.available2014
dc.date.issued2013
dc.date.submitted2014
dc.identifier.issn0167-6636
dc.identifier.urihttp://hdl.handle.net/10985/8619
dc.description.abstractA review of the different phenomenological thermo-viscoplastic constitutive models often applied to forging and machining processes is presented. Several of the most common models have been identified using a large experimental database (Hor et al., 2013). The latter consists of the tests were done in compression on cylindrical shaped specimens and in shear using hat-shaped specimens. The comparison between these different models is shown that the group of decoupled empirical constitutive models (e.g. the Johnson and Cook (1983) model), despite their simple identification procedures, are relatively limited, especially over a large range of strain rates and temperatures. Recent studies have led to the proposal of coupled empirical models. Three models in this class have also been studied. The Lurdos (2008) model shows the best accuracy but requires a large experimental database to identify its high number of parameters. After this comparison, a constitutive equation is proposed by modifying the TANH model (Calamaz et al., 2010). Coupling between the effects of strain rate and temperature is introduced. This model is easier to identify and does not require knowledge of the saturation stress. Compared to other models, it better reproduces the experimental results especially in the semi-hot and hot domains. In order to study real machining conditions, an orthogonal cutting tests is considered. The comparison between experimental test results and numerical simulations conducted using the previously identified constitutive models shows that the decoupled empirical models are not capable of reproducing the experimental observations. However, the coupled constitutive models, that take into account softening, improve the accuracy of these simulations.
dc.language.isoen
dc.publisherElsevier
dc.rightsPost-print
dc.subjectRheology
dc.subjectLarge strain rate and temperature range
dc.subject42CrMo4
dc.subject100Cr6
dc.subjectIdentification
dc.subjectNumerical simulation
dc.titleModelling, identification and application of phenomenological constitutive laws over a large strain rate and temperature range
dc.identifier.doi10.1016/j.mechmat.2013.05.002
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Angers
dc.subject.halSciences de l'ingénieur: Génie des procédés
dc.subject.halSciences de l'ingénieur: Mécanique: Mécanique des matériaux
ensam.audienceInternationale
ensam.page91-110
ensam.journalMechanics of Materials
ensam.volume64
hal.identifierhal-01068551
hal.version1
hal.statusaccept


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