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Title: Influence of anisotropy evolution on strain path independent failure limits
Authors: Bandyopadhyay K.
Basak, Shamik
Lee M.G.
Lee M.-G.
Kim D.
Song J.H.
Kim J.H.
Published in: IOP Conference Series: Materials Science and Engineering
39th International Deep-Drawing Research Group Conference, IDDRG 2020
Abstract: Stress based forming limit diagram (SFLD) and polar effective plastic strain (PEPS FLD) diagram are two techniques reported to be independent of strain path change. Thus, these techniques are capable of predicting failure in pre-strained sheet metal samples. Therefore, in this study evolution in anisotropy properties of sheet metals were considered in terms of evolution in yield shape during conversion of conventional strain based forming limit diagram (FLD) to SFLD and PEPS-FLD. The evolution in anisotropic properties were modelled as a function of effective plastic strain depending on which the anisotropic coefficients of non-quadratic yield model Yld2000-2d were calculated. Further, to analyse the strain path change effect, metal sheets of extra deep drawing quality steels were first deformed under biaxial condition in Marciniak in-plane stretch forming setup. The pre-strained samples were subsequently deformed with hemispherical punch till the necking appears. For failure prediction, finite element modelling of the complete procedure was performed considering evolution in the yield shape. Finally, both the failure criteria were implemented for failure prediction. Implementation of the evolution in yield function in finite element analysis and failure criteria provided better results. © 2020 Published under licence by IOP Publishing Ltd.
Citation: IOP Conference Series: Materials Science and Engineering (2020), 967(1)
Issue Date: 2020
Publisher: IOP Publishing Ltd
ISSN: 17578981
Author Scopus IDs: 7005553771
Author Affiliations: Bandyopadhyay, K., Department of Mechanical Engineering, IIT Bhilai, Raipur, 492015, India
Basak, S., Department of Material Science and Engineering, Seoul National University, Seoul, 08826, South Korea
Lee, M.G., Department of Material Science and Engineering, Seoul National University, Seoul, 08826, South Korea
Appears in Collections:Conference Publications [ME]

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