• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)
  • View Item
  • Home
  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Hardening effects on strain localization predictions in porous ductile materials using the bifurcation approach

Article dans une revue avec comité de lecture
Author
ccCHALAL, Hocine
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
ccABED-MERAIM, Farid

URI
http://hdl.handle.net/10985/9972
DOI
10.1016/j.mechmat.2015.07.012
Date
2015
Journal
Mechanics of Materials

Abstract

The localization of deformation into planar bands is often considered as the ultimate stage of strain prior to ductile fracture. In this study, ductility limits of metallic materials are predicted using the Gurson–Tvergaard–Needleman (GTN) damage model combined with the bifurcation approach. Both the GTN constitutive equations and the Rice bifurcation criterion are implemented into the finite element (FE) code ABAQUS/Standard within the framework of large plastic strains and a fully three-dimensional formulation. The current contribution focuses on the effect of strain hardening on ductility limit predictions. It is shown that the choice of void nucleation mechanism has an important influence on the sensitivity of the predicted ductility limits to strain hardening. When strain-controlled nucleation is considered, varying the hardening parameters of the fully dense matrix material has no effect on the porosity evolution and, consequently, very small impact on the predicted ductility limits. For stress-controlled nucleation, the porosity evolution is directly affected by the strain hardening characteristics, which induce a significant effect on the predicted ductility limits. This paper also discusses the use of a micromechanics-based calibration for the GTN q -parameters in the case of strain-controlled nucleation, which is also shown to allow accounting for the hardening effects on plastic strain localization.

Files in this item

Name:
LEM3_MOM_2015_CHALAL.pdf
Size:
936.6Kb
Format:
PDF
Embargoed until:
2017-11-08
View/Open

Collections

  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)

Related items

Showing items related by title, author, creator and subject.

  • Evaluation of a new solid-shell finite element on the simulation of sheet metal forming processes 
    Communication avec acte
    ccCHALAL, Hocine; SALAHOUELHADJ, Abdellah; ccABED-MERAIM, Farid (Wiley, 2012)
    In this paper, the performance of the solid-shell finite element SHB8PS is assessed in the context of sheet metal forming simulation using anisotropic elastic-plastic behavior models. This finite element technology has ...
  • Vibration modeling of sandwich structures using solid-shell finite elements 
    Communication avec acte
    KPEKY, Fessal; BOUDAOUD, Hakim; ccCHALAL, Hocine; ccABED-MERAIM, Farid; DAYA, El Mostafa (2014)
    The aim of this work is to propose a new finite element modeling for vibration of sandwich structures with soft core. Indeed, several approaches have been adopted in the literature to accurately model these types of ...
  • Dynamic response of viscoelastic multilayers structures using solid-shell finite elements 
    Conférence invitée
    KPEKY, Fessal; BOUDAOUD, Hakim; ccCHALAL, Hocine; ccABED-MERAIM, Farid; DAYA, El Mostafa (2014)
    Because vibrations often lead to noise and system dysfunction, they are therefore undesirable in many situations. One of the proposed ways developed in the literature to reduce vibrations is the use of sandwich structures ...
  • Investigation of ductility limits based on bifurcation theory coupled with continuum damage mechanics 
    Article dans une revue avec comité de lecture
    BOUKTIR, Yasser; ccCHALAL, Hocine; HADDAD, Moussa; ccABED-MERAIM, Farid (Elsevier, 2016)
    The ductility limits of an St14 steel are investigated using an elastic‒plastic‒damage model and bifurcation theory. An associative J2-flow theory of plasticity is coupled with damage within the framework of continuum ...
  • Prédiction de la localisation par une approche d’endommagement micromécanique couplée à une analyse de bifurcation : application à la mise en forme des tôles 
    Communication avec acte
    MANSOURI, Lotfi; ccCHALAL, Hocine; ccABED-MERAIM, Farid; ccBALAN, Tudor (Association Française de Mécanique, 2011)
    Le phénomène de localisation des déformations plastiques, qui apparait lors d’opérations de mise en forme des tôles, représente l’une des principales causes de rebut des pièces produites dans l’industrie. Plusieurs critères ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales