Forming limit prediction by an evolving non-quadratic yield criterion considering the anisotropic hardening and r-value evolution

Junhe Lian*, Sebastian Münstermann

*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

The constitutive model development has been driven to a very accurate and fine-resolution description of the material behaviour responding to various environmental variable changes. The evolving features of the anisotropic behaviour during deformation, therefore, has drawn particular attention due to its possible impacts on the sheet metal forming industry. An evolving non-associated Hill48 (enHill48) model was recently proposed and applied to the forming limit prediction by coupling with the modified maximum force criterion. On the one hand, the study showed the significance to include the anisotropic evolution for accurate forming limit prediction. On the other hand, it also illustrated that the enHill48 model introduced an instability region that suddenly decreases the formability. Therefore, in this study, an alternative model that is based on the associated flow rule and provides similar anisotropic predictive capability is extended to chapter the evolving effects and further applied to the forming limit prediction. The final results are compared with experimental data as well as the results by enHill48 model.

Original languageEnglish
Title of host publicationProceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018
PublisherAmerican Institute of Physics
Volume1960
ISBN (Electronic)9780735416635
DOIs
Publication statusPublished - 2 May 2018
MoE publication typeA4 Article in a conference publication
EventInternational ESAFORM Conference on Material Forming - Palermo, Italy
Duration: 23 Apr 201825 Apr 2018
Conference number: 21

Conference

ConferenceInternational ESAFORM Conference on Material Forming
Abbreviated titleESAFORM
CountryItaly
CityPalermo
Period23/04/201825/04/2018

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