TY - JOUR
T1 - A model of anisotropy evolution of sheet metals
AU - Yoshida, Fusahito
AU - Hamasaki, Hiroshi
AU - Uemori, Takeshi
N1 - Publisher Copyright:
© 2014 The Authors. Published by Elsevier Ltd.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
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.
KW - Anisotropy evolution
KW - Constitutive modeling
KW - Cyclic plasticity
KW - Sheet metals
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U2 - 10.1016/j.proeng.2014.10.100
DO - 10.1016/j.proeng.2014.10.100
M3 - Conference article
AN - SCOPUS:84949132504
VL - 81
SP - 1216
EP - 1221
JO - Procedia Engineering
JF - Procedia Engineering
SN - 1877-7058
T2 - 11th International Conference on Technology of Plasticity, ICTP 2014
Y2 - 19 October 2014 through 24 October 2014
ER -