A model of anisotropy evolution of sheet metals

Fusahito Yoshida; Hiroshi Hamasaki; Takeshi Uemori

doi:10.1016/j.proeng.2014.10.100

A model of anisotropy evolution of sheet metals

Fusahito Yoshida, Hiroshi Hamasaki, Takeshi Uemori

Research output: Contribution to journal › Conference article

3 Citations (Scopus)

Abstract

Conventional plasticity models assume that shapes of yield surfaces are remain fixed throughout plastic deformation. However, some experiments show that anisotropy is changing with increasing plastic strain. This paper proposes a constitutive model that describes the evolution of anisotropy, both for the stress directionality and r-values, of sheet metals. The evolution of anisotropy is expressed by the change of the yield function as a function of the effective plastic strain. The anisotropy model is validated by comparing the experimental data on AA6022-T43 aluminium sheet (after Stoughton, T. B. and Yoon, J. W., Int J Plasticity 25 (2009) 1777-1817). This model is incorporated into the Yoshida-Uemori kinematic hardening model to describe both the Bauschinger effect and the anisotropy evolution.

Original language	English
Pages (from-to)	1216-1221
Number of pages	6
Journal	Procedia Engineering
Volume	81
DOIs	https://doi.org/10.1016/j.proeng.2014.10.100
Publication status	Published - Jan 1 2014
Externally published	Yes
Event	11th International Conference on Technology of Plasticity, ICTP 2014 - Nagoya, Japan Duration: Oct 19 2014 → Oct 24 2014

Keywords

Anisotropy evolution
Constitutive modeling
Cyclic plasticity
Sheet metals

ASJC Scopus subject areas

Engineering(all)

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10.1016/j.proeng.2014.10.100

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Yoshida, F., Hamasaki, H., & Uemori, T. (2014). A model of anisotropy evolution of sheet metals. Procedia Engineering, 81, 1216-1221. https://doi.org/10.1016/j.proeng.2014.10.100

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abstract = "Conventional plasticity models assume that shapes of yield surfaces are remain fixed throughout plastic deformation. However, some experiments show that anisotropy is changing with increasing plastic strain. This paper proposes a constitutive model that describes the evolution of anisotropy, both for the stress directionality and r-values, of sheet metals. The evolution of anisotropy is expressed by the change of the yield function as a function of the effective plastic strain. The anisotropy model is validated by comparing the experimental data on AA6022-T43 aluminium sheet (after Stoughton, T. B. and Yoon, J. W., Int J Plasticity 25 (2009) 1777-1817). This model is incorporated into the Yoshida-Uemori kinematic hardening model to describe both the Bauschinger effect and the anisotropy evolution.",

keywords = "Anisotropy evolution, Constitutive modeling, Cyclic plasticity, Sheet metals",

author = "Fusahito Yoshida and Hiroshi Hamasaki and Takeshi Uemori",

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N2 - Conventional plasticity models assume that shapes of yield surfaces are remain fixed throughout plastic deformation. However, some experiments show that anisotropy is changing with increasing plastic strain. This paper proposes a constitutive model that describes the evolution of anisotropy, both for the stress directionality and r-values, of sheet metals. The evolution of anisotropy is expressed by the change of the yield function as a function of the effective plastic strain. The anisotropy model is validated by comparing the experimental data on AA6022-T43 aluminium sheet (after Stoughton, T. B. and Yoon, J. W., Int J Plasticity 25 (2009) 1777-1817). This model is incorporated into the Yoshida-Uemori kinematic hardening model to describe both the Bauschinger effect and the anisotropy evolution.

AB - Conventional plasticity models assume that shapes of yield surfaces are remain fixed throughout plastic deformation. However, some experiments show that anisotropy is changing with increasing plastic strain. This paper proposes a constitutive model that describes the evolution of anisotropy, both for the stress directionality and r-values, of sheet metals. The evolution of anisotropy is expressed by the change of the yield function as a function of the effective plastic strain. The anisotropy model is validated by comparing the experimental data on AA6022-T43 aluminium sheet (after Stoughton, T. B. and Yoon, J. W., Int J Plasticity 25 (2009) 1777-1817). This model is incorporated into the Yoshida-Uemori kinematic hardening model to describe both the Bauschinger effect and the anisotropy evolution.

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