Constitutive Modelling of an Industrial Rolled Sheet for a DIN 1623 St14 (DC04) Steel
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Date
2019-09-17
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Abstract
The comprehension of the anisotropy impacts on mechanical properties of the rolled steel
sheets was investigated using a non-quadratic anisotropic yield function. In this study, experimental
and modelling determination of behavior of an industrial rolled sheets for a DIN 1623 St14 steel were
carried out. The yield stresses and Lankford r-values in uniaxial were experimentally determined but
the balanced biaxial tension stress states and rb were assumed. The parameters of the associated yield
equation, derived from the three orthotropic yield functions proposed by Hill48 and Yld2000-2d,
were determined. Predictions and the evolution of normalized yield stress and normalized Lankford
parameters (plastic strain ratio) obtained by the presented investigative are considered. In order to
describe the path of equivalent plastic behavior, the isotropic hardening function is described using
the following various empirical standard formulae based on: Hollomon, Ludwick, Swift and Voce
model.