Identification of Anisotropic Yield Criterion Parameters from a Single Biaxial Tensile Test

Abstract:

The present work deals with the calibration strategy of yield functions used to describe the plastic anisotropic behavior of metallic sheets. In this paper, Bron and Besson yield criterion is used to model the plastic anisotropic behavior of AA5086 sheets. This yield model is flexible enough since the anisotropy is represented by 12 parameters (4 isotropic parameters and 8 anisotropic parameters in plane stress condition) in the form of two linear fourth order transformation tensors. The parameters of this anisotropic yield model have been identified from a single dedicated cross biaxial tensile test. It is shown, from finite element simulations, that the strain distribution in the center of the cruciform specimen is significantly dependent on the yield criterion. Moreover, this cross biaxial test involves a large range of strain paths in the center of the specimen. The calibration stage is performed by means of an optimization procedure minimizing the gap between experimental and numerical values of the principal strains along a specified path in the gauge area of the cruciform specimen. It is shown that the material parameters of Bron and Besson anisotropic yield model can be determined accurately by a unique biaxial tensile test.

• Periodical: Key Engineering Materials (Volumes 611-612)
• Pages: 1710-1717
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.611-612.1710
• Online since: May 2014
• Authors: Shun Ying Zhang, Lionel Leotoing, Dominique Guines*, Sandrine Thuillier
• Keywords: Biaxial Test, Material Parameter Identification, Plastic Anisotropy, Yield Criterion

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