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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/23590
Title: Improved formability prediction by modeling evolution of anisotropy of steel sheets
Authors: Bandyopadhyay K.
Basak, Shamik
Prasad K.S.
Lee M.-G.
Panda S.K.
Lee J.
Published in: International Journal of Solids and Structures
Abstract: Depending on the experimental observations, the Marciniak–Kuckzinki (MK) model was modified incorporating the evolution in the Yld2000-2d anisotropic yield function as a function of plastic work for two ferritic stainless steel sheets. The numerically estimated FLDs were validated with the strain limits evaluated by stretch forming experiments. Moreover, FE simulations were conducted to predict limiting dome heights (LDH) and limiting drawing ratios (LDR) by both models with and without considering the anisotropy evolutions. Additional formability performances such as surface strain distributions over the deformed cup surfaces and earing profile were also compared with experimental results. It was observed that the accuracy of predictions for formability could be significantly improved in the FE simulations when both initial and its subsequent evolution in yield function were included in the modeling. Further, microstructural analysis of parent sheets and stretch formed cups were performed to understand the effect of microstructure change on the anisotropy and formability. It was found that the preferred orientations along rolling and transverse directions changed differently with deformation. Orientation distribution function and Taylor factor maps were analyzed to confirm non-proportional evolution in stress directionality for both the materials. © 2018
Citation: International Journal of Solids and Structures, 156-157: 263-280
URI: https://doi.org/10.1016/j.ijsolstr.2018.08.024
http://repository.iitr.ac.in/handle/123456789/23590
Issue Date: 2019
Publisher: Elsevier Ltd
Keywords: Evolutionary yield function
Forming limit diagram
MK model
Sheet metal forming
Texture analysis
Yld2000-2d
ISSN: 207683
Author Scopus IDs: 7005553771
56489932500
54414702700
26323686000
55213614000
55689948000
Author Affiliations: Bandyopadhyay, K., Department of Materials Science and Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 136-701, South Korea, Department of Materials Science and Engineering and RIAM, Seoul National UniversitySeoul 08826, South Korea
Basak, S., Department of Mechanical Engineering, IIT Kharagpur, Kharagpur, West Bengal 721302, India
Prasad, K.S., Department of Mechanical Engineering, IIT Kharagpur, Kharagpur, West Bengal 721302, India
Lee, M.-G., Department of Materials Science and Engineering and RIAM, Seoul National UniversitySeoul 08826, South Korea
Panda, S.K., Department of Mechanical Engineering, IIT Kharagpur, Kharagpur, West Bengal 721302, India
Lee, J., Department of Materials Science and Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 136-701, South Korea
Funding Details: This work was supported by the Korea University Grant for the first author. Authors are also thankful to Central Research Facilities, IIT Kharagpur, India for metallographic facilities. MGL appreciates the supports from National Research Foundation of Korea (NRF grant number: 2017R1A2A2A05069619 ) and ERC center ITAF (NRF grant number: 2012R1A5A1051500 ). European Research Council, ERC: 2012R1A5A1051500; Korea University, KU; National Research Foundation of Korea, NRF: 2017R1A2A2A05069619
Corresponding Author: Lee, M.-G.; Department of Materials Science and Engineering and RIAM, South Korea; email: myounglee@snu.ac.kr
Appears in Collections:Journal Publications [ME]

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