Study of texture effect on strain localization of bcc steel sheets

O34; Using elastic crystalline viscoplastic finite element (FE) annlysis, the formability of BCC steel sheets was assessed. An orientation probability assignment method in the FE modeling procedure, which can be categorized as an inhomogenized material modeling, was newly proposed. In the study, the...

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Bibliographic Details
Published in:Acta mechanica solida Sinica 2000-06, Vol.13 (2), p.95-104
Main Authors: XIE CHUNLEI, NAKAMACHI, E, DONG XIANGHUAI
Format: Article
Language:English
Subjects:
Applied sciences
Computational techniques
Elasticity. Plasticity
Exact sciences and technology
Finite-element and galerkin methods
Mathematical methods in physics
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Physics
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Summary:O34; Using elastic crystalline viscoplastic finite element (FE) annlysis, the formability of BCC steel sheets was assessed. An orientation probability assignment method in the FE modeling procedure, which can be categorized as an inhomogenized material modeling, was newly proposed. In the study, the crystal orientations of three materials, mild steel, dual phase steel and the high strength steel, were obtained by X ray diffraction and orientation distribution function (ODF) analyses. The measured ODF results have revealed clearly different textures in the sheets, featured by orientation fibers, skeleton lines and selected orientations in Euler angle space, which are closely related to the plastic anisotropy. Then, the crystal orientations were assigned to FE integration points by using this ODF data, individually. The FE analyses of the standard lim iting dome height(LDH) test show how the fiber textures affect the extent of strain localization in the forming processes. It was confirmed by comparison with experimental results that this FE code could predict the ex treme strain localization and assess the sheet formability.
ISSN:0894-9166
1860-2134