A constitutive equation for description of large-strain cyclic plasticity

Fusahito Yoshida, Takeshi Uemori

Research output: Contribution to journalArticle

Abstract

This paper presents a constitutive model of plasticity that describes the cyclic stress-strain responses at large strain. A new equation of backstress evolution is proposed for an accurate simulation of the transient Bauschinger effect. An original idea of a non-isotropic-hardening surface defined in the stress space is presented for the description of the workhardening stagnation appearing under reverse deformation, as well as the strain-range and mean-strain dependencies of cyclic hardening characteristics. The validity of this model is confirmed by comparing the cyclic stress-strain responses calculated by the model with the experimental observations on two types of steel sheets (an aluminum-killed steel and a dual-phase high strength steel of 590 MPa tensile strength).

Original languageEnglish
Pages (from-to)415-421
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume68
Issue number3
Publication statusPublished - Mar 2002
Externally publishedYes

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Constitutive equations
Plasticity
Hardening
Steel
Steel sheet
Constitutive models
Aluminum
High strength steel
Tensile strength

Keywords

  • Bauschinger effect
  • Computational mechanics
  • Constitutive equation
  • Large strain
  • Plasticity
  • Workhardening stagnation

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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AB - This paper presents a constitutive model of plasticity that describes the cyclic stress-strain responses at large strain. A new equation of backstress evolution is proposed for an accurate simulation of the transient Bauschinger effect. An original idea of a non-isotropic-hardening surface defined in the stress space is presented for the description of the workhardening stagnation appearing under reverse deformation, as well as the strain-range and mean-strain dependencies of cyclic hardening characteristics. The validity of this model is confirmed by comparing the cyclic stress-strain responses calculated by the model with the experimental observations on two types of steel sheets (an aluminum-killed steel and a dual-phase high strength steel of 590 MPa tensile strength).

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