Prediction of forming limit diagram of automotive sheet metals using a new necking criterion
PHAM Quoc Tuan, ISLAM Md Shafiqul, SIGVANT Mats, CARO Perez Lluisdownload PDF
Abstract. A theoretical model for predicting the forming limit diagram of sheet metal, named MMFC2, was recently proposed by the authors based on the modified maximum force criterion (MMFC). This study examines the application of MMFC2 for two automotive sheets, DP800 and AA6016, which are widely used in making car body parts. Uniaxial tensile and bulge tests are conducted to calibrate constitutive equations for modeling the tested materials. The developed material models are employed into different frameworks such as MMFC, MMFC2, and Marciniak-Kuczynski (MK) models to forecast the forming limit curve (FLC) of the tested materials. Their predictions are validated by comparing with an experimental one obtained from a series of Nakajima tests. It is found that the derived results of MMFC2 are comparable to that of MK model and agreed reasonably with experimental data. Less computational time is the major advantage of MMFC2 against the MK model.
Forming Limit Diagram, DP800, AA6016, MMFC2, MK Method
Published online 4/19/2023, 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: PHAM Quoc Tuan, ISLAM Md Shafiqul, SIGVANT Mats, CARO Perez Lluis, Prediction of forming limit diagram of automotive sheet metals using a new necking criterion, Materials Research Proceedings, Vol. 28, pp 705-710, 2023
The article was published as article 76 of the book Material Forming
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