J. Phys. IV France 105 (2003) 297
DOI: 10.1051/jp4:20030200

Description of anisotropic behaviour of AA3100 aluminium alloy using two recent yield criteria

D. Banabic^{1, 2}, O. Cazacu³, F. Barlat⁴, D.S. Comsa¹, S. Wagner² and K. Siegert<sup>2

1</sup>  Mechanical Technology Department, Technical University of Cluj Napoca, Cluj Napoca, Romania
²  Institute for Metal Forming Technologies, Stuttgart University, Stuttgart, Germany
³  Department of Mechanical and Aerospace Engineering, University of Florida, Shalimar, FL 32579-1163, U.S.A.
⁴  Materials Science Division, Alcoa Technical Center, 100 Technical Drive, Alcoa Center, PA 15069-0001, U.S.A.

Abstract
Biaxial tensile deformation tests were carried out on cruciform specimens of AA3100, 1. 2 mm thick sheet samples using a CNC stretch-drawing facility designed and built at the Institute for Metal Forming Technology, Stuttgart University. The beginning of plastic yield was monitored by temperature measurements according to the method of Sallat. The observed plastic anisotropy was modeled using the phenomenological descriptions developed by Banabic et al. [1] and by Cazacu and Barlat [2]. In Banabic et al. [1] the anisotropy is introduced by a means of a linear transformation of the Cauchy stress tensor applied to the material whereas Cazacu and Barlat's [2] approach is based on representation theorems of tensor functions. Comparison with data shows that the criteria can successfully describe the anisotropy of both the plastic strain ratio and yield of AA3100 aluminum thin sheets.

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