Numerical assessment of the role of anisotropy on strain localization in uniaxial tension

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Numerical assessment of the role of anisotropy on strain localization in uniaxial tension

CORALLO Luca, CAZACU Oana, VERLEYSEN Patricia

Abstract. Despite the experimental evidence of the effect of loading direction on the inclination of necking bands in uniaxial tension, theoretical and numerical studies are mainly devoted to isotropic materials. Recently, theoretical, numerical, and experimental works have put into evidence the key role of the material anisotropy on the formation of localized necking bands. In particular, Cazacu and Rodriguez (2019) [1] provided analytical expressions for the orientations of the necking bands that develop under uniaxial tension in flat specimens . It was shown that there is a switch in the orientation of main necking band from acute to obtuse, which is correlated with the anisotropy in yield stresses. In this paper, we conduct a FE study on virtual materials with the same anisotropy in Lankford coefficients but different anisotropy in yield stresses. We show that, although both materials have a very slight anisotropy in yield stresses, it strongly affects the localization behavior.

Keywords
Uniaxial Tensile Test, Necking Bands, Orthotropy

Published online 4/24/2024, 9 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: CORALLO Luca, CAZACU Oana, VERLEYSEN Patricia, Numerical assessment of the role of anisotropy on strain localization in uniaxial tension, Materials Research Proceedings, Vol. 41, pp 1080-1088, 2024

DOI: https://doi.org/10.21741/9781644903131-119

The article was published as article 119 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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