Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Regular Article
Constitutive Modeling of Yield-Point Phenomenon in Finite Strain Elastoplasticity
Ikumu WatanabeNoritoshi Iwata
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2014 Volume 100 Issue 10 Pages 1232-1237

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Abstract

A standard elastoplastic constitutive model of metallic materials is extended to describe the stress-strain relationship including yield-point phenomenon. Based on a general framework of finite strain elastoplasticity, two constitutive models are formulated in this study. One of them is a phenomenological constitutive equation added one scaler internal variable. Another is a constitutive model based on a representative characteristic length defined as a dominant strengthening mechanism in some competing strengthening mechanisms including dislocation accumulations. The feature of these constitutive models is discussed by reproducing an experimental stress-strain relationship.

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© 2014 The Iron and Steel Institute of Japan
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