Analytical methodology for the determination of the flow curves of aluminum and steel alloys using the hydraulic bulge tests

Hamzah Alharthi, Sumit Hazra, Dorel Banabic, R. Dashwood

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

Abstract

In sheet metal forming simulation, flow curve is a vital ingredient for reliable numerical results. It is more appropriate to determine the flow curve using biaxial stress state tests such as hydraulic bulge test instead of uniaxial test because hardening proceeds to higher strains. With a uniaxial test, higher strains are extrapolated which might lead to incorrect results. The bulge test coupled with the digital image correlation (DIC) system is utilized for the determination of the stress-strain data. In the absence of DIC system, analytical methodologies were used to estimate hardening. Typically such models incorporate a correction factor to achieve correlation to experimental data. An example is the Chakrabarty and Alexander method which uses a correction factor based on the n-value. Here, the Chakrabarty and Alexander approach is modified by utilizing a correction factor based on normal anisotropy. When compared to DIC data, the modified model was found to be predictive of hardening curves for the materials under this study.
Original languageEnglish
Title of host publicationAIP Conference Proceedings
EditorsE. Cueto, F. Chinesta, E. Abisset-Chavanne
PublisherAmerican Institute of Physics
Volume1769
ISBN (Print)978-073541427-3
DOIs
Publication statusPublished - 19 Oct 2016
Externally publishedYes
EventInternational ESAFORM Conference on Material Forming - Nantes, France
Duration: 27 Apr 201629 Apr 2016
Conference number: 19
http://esaform19.ec-nantes.fr/Welcome.html

Publication series

NameAIP Conference Proceedings
PublisherAmerican Institute of Physics Inc.
Number1
Volume1769
ISSN (Print)0094-243X

Conference

ConferenceInternational ESAFORM Conference on Material Forming
Abbreviated titleESAFORM 2016
CountryFrance
CityNantes
Period27/04/1629/04/16
Internet address

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  • Cite this

    Alharthi, H., Hazra, S., Banabic, D., & Dashwood, R. (2016). Analytical methodology for the determination of the flow curves of aluminum and steel alloys using the hydraulic bulge tests. In E. Cueto, F. Chinesta, & E. Abisset-Chavanne (Eds.), AIP Conference Proceedings (Vol. 1769). [200004] (AIP Conference Proceedings; Vol. 1769, No. 1). American Institute of Physics. https://doi.org/10.1063/1.4963622