A yield criterion through coupling of quadratic and non quadratic functions for anisotropic hardening with non associated flow rule

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This paper proposes a simple coupling of quadratic and non-quadratic yield functions with a non-associated flow rule to describe the evolution of yield surface (or anisotropic hardening). The non-quadratic part is an isotropic function and is supposed to control curvature of the whole model. The quadratic part takes a role to describe anisotropic hardening throughout a deformation history by employing the hardening functions of different loading conditions. The new yield model just multiplies a quadratic and non quadratic parts, and it does need neither any interpolation nor optimization at a discrete level of equivalent plastic strain. The new model is compared with several material models with four different material data in order to validate advantages of the new model in capturing anisotropic hardening and controlling its curvature of yield surface. In addition, artificial material cases are applied to the new model to study sensitivity of the model.(C) 2017 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2017-12
Language
English
Article Type
Article
Keywords

ALUMINUM-ALLOY SHEETS; NONASSOCIATED FLOW; ELEVATED-TEMPERATURES; PART 1; METALS; PLASTICITY; FORMULATION; SIMULATION; EVOLUTION; MODEL

Citation

INTERNATIONAL JOURNAL OF PLASTICITY, v.99, pp.120 - 143

ISSN
0749-6419
DOI
10.1016/j.ijplas.2017.08.007
URI
http://hdl.handle.net/10203/228433
Appears in Collection
ME-Journal Papers(저널논문)
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