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dc.contributor.author
 hal.structure.identifier
BEN BETTAIEB, Mohamed
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
243747 Labex DAMAS
dc.contributor.author
 hal.structure.identifier
ABED-MERAIM, Farid
243747 Labex DAMAS
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
dc.date.accessioned2017
dc.date.available2018
dc.date.issued2017
dc.date.submitted2017
dc.identifier.issn0020-7403
dc.identifier.urihttp://hdl.handle.net/10985/11857
dc.description.abstractIn modern sheet metal forming processes, such as hydroforming and single point incremental forming, sheet metals are often subjected to out-of-plane compressive stresses in addition to traditional in-plane stresses. However, the effect of these out-of-plane stresses on the onset of plastic strain localization is not considered when classic necking criteria are used, as the latter are generally formulated based on the plane stress assumption. The main objective of the present investigation is to overcome this limitation by developing numerical tools and analytical relations that allow considering the influence of these compressive stresses on the prediction of localized necking. In the different tools developed, and for comparison purposes, finite strain versions of both the deformation theory of plasticity and the rigid-plastic flow theory are used to describe the mechanical behavior of the metal sheet. Furthermore, both the bifurcation theory and the initial imperfection approach are employed to predict the onset of strain localization. Various numerical predictions are reported to illustrate the effect of normal stress on the occurrence of localized necking in sheet metals. From these different results, it is clearly demonstrated that out-of-plane stresses may notably enhance sheet metal formability and, therefore, this property can be effectively used to avoid the initiation of early strain localization.
dc.language.isoen
dc.publisherElsevier
dc.rightsPost-print
dc.subjectOut-of-plane stress
dc.subjectForming limit diagrams
dc.subjectLocalized necking
dc.subjectFlow theory
dc.subjectDeformation theory
dc.subjectBifurcation analysis
dc.subjectMarciniak–Kuczynski approach
dc.titleTheoretical and numerical investigation of the impact of out-of-plane compressive stress on sheet metal formability
ensam.embargo.terms2018-03
dc.identifier.doi10.1016/j.ijmecsci.2017.05.046
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Metz
dc.subject.halSciences de l'ingénieur: Mécanique
ensam.audienceInternationale
ensam.page244-257
ensam.journalInternational Journal of Mechanical Sciences
ensam.volume130
ensam.peerReviewingOui
hal.identifierhal-01544295
hal.version1
hal.statusaccept


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