Analysis of Yield Criteria and Flow Curves on FLC for TWIP900 Steel
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RESEARCH PAPER
Analysis of Yield Criteria and Flow Curves on FLC for TWIP900 Steel S. Kilic 1
&
F. Ozturk 2,3 & S. Toros 4
Received: 15 October 2018 / Accepted: 13 May 2020 # The Society for Experimental Mechanics, Inc 2020
Abstract In this study, the applicability of yield criteria and flow curve models to predict forming limit curve (FLC) via the MarciniakKuczynski (M-K) model is investigated for TWIP900 steel. Forming limit characteristics of TWIP900 are determined experimentally and numerically. The yield criteria of Hill48, Barlat89, YLD2000-2d, and BBC2000 are tested and compared with each other. Results indicate that the YLD2000-2d and the BBC2000 yield criteria are found to be more accurate than the other criteria. The YLD2000 criterion has the best prediction capability with the Krupskowsky flow curve while the BBC2000 model has the best prediction with the Ludwick flow curve model. Keywords Yield criteria . Forming limit curve . TWIP steel . M-K model
Introduction Fossil fuel reserves in the world have been swiftly decreased and environmental pollution has dramatically increased. Tremendous amount of efforts have been made in many industries to reduce fuel consumption and reduce carbon dioxide emission. The automotive industry is one of the major players on the impact of environmental pollution. Recently, the automotive industry has primarily focused on fuel consumption reduction of the vehicles by lightening the structures, using hybrid systems in which both fossil fuels and electric power are used with together or electric vehicles which also decrease environmental pollution. However, the travel range of these new hybrid systems is a serious limitation and the investments and investigations on the battery technologies have been increased. The lightening of the system components in the automotive industry without sacrificing strength is one of the most important research topics for
* S. Kilic [email protected] 1
Department of Mechanical Engineering, Kırşehir Ahi Evran University, Kırşehir, Turkey
2
Turkish Aerospace Industries, Inc., Ankara, Turkey
3
Department of Mechanical Engineering, Ankara Yıldırım Beyazıt University, Ankara, Turkey
4
Department of Mechanical Engineering, Omer Halisdemir University, Niğde, Turkey
Original Equipment Manufacturers (OEMs) and scientists from past to present. The light vehicle can easily satisfy environmental regulation, restriction, and minimum emission requirements. Advanced High Strength Steels (AHSS) are a commonly used material group for the structural lightening projects since their thinner forms are able to satisfy the desired safety and formability requirements [1]. It is expected that new generation material groups like AHSS or some special non-ferrous materials in the structural lightening projects will have positive impact on carbon emissions without sacrificing safety or even increasing safety requirements. In the automotive industry, aluminium-magnesium (Al-Mg) alloys and AHSS are widely considered to reduce the weight of the vehi
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