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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/23641
Title: Effect of Anisotropic Yield Function Evolution on Estimation of Forming Limit Diagram
Authors: Bandyopadhyay K.
Basak, Shamik
Choi H.J.
Panda S.K.
Lee M.G.
Volk W.
Published in: Journal of Physics: Conference Series
36th IDDRG Conference 2017: Materials Modelling and Testing for Sheet Metal Forming
Abstract: In case of theoretical prediction of the FLD, the variations in yield stress and R-values along different material directions, were long been implemented to enhance the accuracy. Although influences of different yield models and hardening laws on formability were well addressed, anisotropic evolution of yield loci under monotonic loading with different deformation modes is yet to be explored. In the present study, Marciniak-Kuckzinsky (M-K) model was modified to incorporate the change in the shape of the initial yield function with evolution due to anisotropic hardening. Swift's hardening law along with two different anisotropic yield criteria, namely Hill48 and Yld2000-2d were implemented in the model. The Hill48 yield model was applied with non-associated flow rule to comprehend the effect of variations in both yield stress and R-values. The numerically estimated FLDs were validated after comparing with FLD evaluated through experiments. A low carbon steel was selected, and hemispherical punch stretching test was performed for FLD evaluation. Additionally, the numerically estimated FLDs were incorporated in FE simulations to predict limiting dome heights for validation purpose. Other formability performances like strain distributions over the deformed cup surface were validated with experimental results. © Published under licence by IOP Publishing Ltd.
Citation: Journal of Physics: Conference Series (2017), 896(1)
URI: https://doi.org/10.1088/1742-6596/896/1/012015
http://repository.iitr.ac.in/handle/123456789/23641
Issue Date: 2017
Publisher: Institute of Physics Publishing
Keywords: Anisotropy
Carbon
Finite element method
Forming
Hardening
Low carbon steel
Materials testing
Metal forming
Metal testing
Sheet metal
Strain
Anisotropic evolution
Anisotropic hardenings
Anisotropic yield functions
Anisotropic yields
Forming limit diagrams
Hemispherical punch stretching
Non-associated flow rule
Strain distributions
Yield stress
ISSN: 17426588
Author Scopus IDs: 7005553771
56489932500
57201370630
55213614000
26323686000
Author Affiliations: Bandyopadhyay, K., Department of Materials Science and Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 136-701, South Korea
Basak, S., Department of Mechanical Engineering, IIT Kharagpur, West-Bengal-Kharagpur, 721302, India
Choi, H.J., Department of Materials Science and Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 136-701, South Korea
Panda, S.K., Department of Mechanical Engineering, IIT Kharagpur, West-Bengal-Kharagpur, 721302, India
Lee, M.G., Department of Materials Science and Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 136-701, South Korea
Funding Details: Authors acknowledges supports received from National Research Foundation of Korea (NRF) grants funded by the Korea government (MSIP) (No. 2012R1A5A1048294) and from the Ministry of Trade, Industry and Energy (MOTIE) (No. 10063488). Ministry of Trade, Industry and Energy, MOTIE: 10063488; Ministry of Science, ICT and Future Planning, MSIP: 2012R1A5A1048294; National Research Foundation of Korea, NRF
Appears in Collections:Conference Publications [ME]

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