Investigation on the ductile fracture of a high-strength dual-phase steel with anisotropic damage mechanics model

Zinan Li, Wenqi Liu, Fuhui Shen, Sebastian Münstermann, Junhe Lian*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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Abstract

In this study, a hybrid experimental and numerical investigation is implemented to characterize the plasticity and ductile fracture behavior of a high-strength dual-phase steel. Uniaxial tensile tests are conducted along the three typical directions of rolled sheet metals for the anisotropic plastic behavior, while the hydraulic bulge test is applied for the flow behavior under equiaxial biaxial tension. Further tensile tests are conducted on various featured dog-bone specimens to study the fracture behavior of the material from the uniaxial to plane-strain tension. On the numerical side, the evolving non-associated Hill48 (enHill48) plasticity model considering anisotropic hardening and plastic strain ratio evolution is employed to describe the anisotropic plastic deformation. The extended enHill48 model with damage and fracture formulation is further calibrated and validated in the study to describe the ductile fracture behavior of the steel under various stress states. Through a comparison of the results based on the evolving anisotropic model with the isotropic Mises model, it is concluded that even for materials that show only minor initial plastic anisotropy, it could develop a nonnegligible influence on the large plastic deformation and the prediction of both deformation and fracture shows
profound improvement with the evolving anisotropic plasticity model.
Original languageEnglish
Title of host publicationProceedings of the 24th International ESAFORM Conference on Material Forming
Number of pages10
ISBN (Electronic)978-2-87019-303-7
DOIs
Publication statusPublished - 1 Apr 2021
MoE publication typeA4 Article in a conference publication
EventInternational ESAFORM Conference on Material Forming - Virtual, Liége, Belgium
Duration: 1 Apr 202130 Apr 2021
Conference number: 24

Conference

ConferenceInternational ESAFORM Conference on Material Forming
Country/TerritoryBelgium
CityLiége
Period01/04/202130/04/2021

Keywords

  • Anisotrophy
  • Dectile Fracture
  • Dual-phase Steel
  • Damage
  • Evolving Plasticity Model

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