Portal de Periódicos da CAPES

Characterization of the strain-induced plastic anisotropy of rolled sheets by using sequences of simple shear and uniaxial tensile tests

2006; Elsevier BV; Volume: 174; Issue: 1-3 Linguagem: Inglês

10.1016/j.jmatprotec.2005.04.086

1873-4774

Salima Bouvier, B. Gardey, H. Haddadi, Cristian Teodosiu,

Metallurgy and Material Forming

The characterization of the plastic behaviour of rolled metal sheets at large strains is a critical ingredient of any finite element analyse software aimed at predicting stress and strain distributions and the eventual occurrence of defects in sheet metal forming. On the other hand, due to the reduced thickness of such rolled sheets, the experimental techniques available for their characterization are scarce. Recently, however, the development of reliable simple shear tests has brought a real breakthrough in this area. The present paper shows how two-stage non-proportional loadings involving sequences of simple shear and/or uniaxial tensile deformations can be adequately used to investigate the isotropic, kinematic and distortional hardening of rolled metal sheets at moderate and finite strains. The experimental techniques and their optimization are analysed and several examples concerning currently used structural materials are provided.